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Associate Professor Torsten Lehmann

Associate Professor Torsten Lehmann

Associate Professor
Engineering
Electrical Engineering and Telecommunications

Dr Torsten Lehmann is Associate Professor in Microelectronics with the School of Electrical Engineering and Telecommunications. His research interests include:

  • Solid-state circuits and systems
  • CMOS circuits at cryogenic temperature
  • Ultra low-power CMOS design
  • Bio-medical microelectronics
  • Cochlear implants and vision prostheses
  • High-performance analogue circuits in deep sub-micron CMOS
Phone
+61 2 9385 5374
E-mail
t.lehmann@unsw.edu.au
Location
School of Electrical Engineering and Telecommunications (Building G17) Room 343
  • Book Chapters | 2022
    Lehmann T; Jung LH; Suaning GJ; Lovell NH, 2022, 'Visual Stimulation Systems', in Handbook of Biochips: Integrated Circuits and Systems for Biology and Medicine, pp. 517 - 539,
    Book Chapters | 2019
    Lehmann T; Aluthwala P; Parameswaran S, 2019, 'Digitally enhanced digital-to-analogue converters', in Digitally Enhanced Mixed Signal Systems, pp. 227 - 254
    Book Chapters | 2018
    Lehmann T; van Schaik A, 2018, 'Implantable hearing interfaces', in Living Machines: A Handbook of Research in Biomimetic and Biohybrid Systems, pp. 520 - 525,
    Book Chapters | 2017
    McEwan A; Gargiulo GD; Fornusek C; Lehmann T, 2017, 'Bioelectronics', in Encyclopedia of Computer Science and Technology, CRC Press, pp. 172 - 185,
    Book Chapters | 2015
    Lehmann T; Jung LH; Suaning GJ; Lovell NH, 2015, 'Visual Stimulation Systems', in Handbook of Biochips, Springer New York, pp. 1 - 23,
    Book Chapters | 2007
    Lovell NH; Hallum LE; Chen SC; Dokos S; Preston P; Green RA; Poole-Warren LA, 2007, 'Advances in Retinal Neuroprosthetics', in Metin Akay (ed.), Handbook of Neural Engineering, IEEE Press, Piscataway, New Jersey, USA, pp. 337 - 356
  • Journal articles | 2024
    Ladouceur F; Al Abed A; Lehmann T; Almasri RM; Firth J; Lovell NH, 2024, 'All optical neural interfaces', Applied Optics, 63, pp. D21 - D27,
    Journal articles | 2023
    Almasri RM; Ladouceur F; Mawad D; Esrafilzadeh D; Firth J; Lehmann T; Poole-Warren LA; Lovell NH; Al Abed A, 2023, 'Emerging trends in the development of flexible optrode arrays for electrophysiology', APL Bioengineering, 7,
    Journal articles | 2023
    Wei Y; Wang H; Al Abed A; Almasri RM; Lei X; Firth J; Silvestri L; Ladouceur F; Lehmann T; Lovell NH, 2023, 'A Bi-Directional Detection and Stimulation Optrode System With Charge Balancing for Neural Applications', Journal of Lightwave Technology, 41, pp. 4463 - 4472,
    Journal articles | 2022
    Al Abed A; Wei Y; Almasri RM; Lei X; Wang H; Firth J; Chen Y; Gouailhardou N; Silvestri L; Lehmann T; Ladouceur F; Lovell NH, 2022, 'Liquid crystal electro-optical transducers for electrophysiology sensing applications', Journal of Neural Engineering, 19,
    Journal articles | 2022
    Almasri RM; Abed AA; Wei Y; Wang H; Firth J; Poole-Warren LA; Ladouceur F; Lehmann T; Lovell NH, 2022, 'Impedance Properties of Multi-Optrode Biopotential Sensing Arrays', IEEE Transactions on Biomedical Engineering, 69, pp. 1674 - 1684,
    Journal articles | 2021
    Wei Y; Lehmann T; Silvestri L; Wang H; Ladouceur F, 2021, 'Photodiode working in zero-mode: Detecting light power change with DC rejection and AC amplification', Optics Express, 29, pp. 18915 - 18931,
    Journal articles | 2019
    Irfansyah AN; Lehmann T; Jenkins J; Tong T; Hamilton TJ, 2019, 'A resistive DAC for a multi-stage sigma-delta modulator DAC with dynamic element matching', Analog Integrated Circuits and Signal Processing, 98, pp. 109 - 123,
    Journal articles | 2018
    Cook AJ; Ng B; Gargiulo GD; Hindmarsh D; Pitney M; Lehmann T; Hamilton TJ, 2018, 'Instantaneous VO2 from a wearable device', Medical Engineering and Physics, 52, pp. 41 - 48,
    Journal articles | 2018
    George L; Lehmann T; Hamilton TJ, 2018, 'A reconfigurable dual-output buck-boost switched-capacitor converter using adaptive gain and discrete frequency scaling control', Microelectronics Journal, 73, pp. 59 - 74,
    Journal articles | 2017
    Aluthwala PD; Weste N; Adams A; Lehmann T; Parameswaran S, 2017, 'Partial dynamic element matching technique for digital-to-analog converters used for digital harmonic-cancelling sine-wave synthesis', IEEE Transactions on Circuits and Systems I: Regular Papers, 64, pp. 296 - 309,
    Journal articles | 2017
    Nicholson AP; Irfansyah AN; Jenkins J; Hamilton TJ; Lehmann T, 2017, 'A statistical design approach using fixed and variable width transconductors for positive-feedback gain-enhancement OTAs', IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 25, pp. 1966 - 1977,
    Journal articles | 2017
    Rahman MT; Lehmann T, 2017, 'A Self-Calibrated Cryogenic Current Cell for 4.2 K Current Steering D/A Converters', IEEE Transactions on Circuits and Systems II: Express Briefs, 64, pp. 1152 - 1156,
    Journal articles | 2016
    George L; Gargiulo GD; Lehmann T; Hamilton TJ, 2016, 'A 0.04 mm2 Buck-Boost DC-DC Converter for Biomedical Implants Using Adaptive Gain and Discrete Frequency Scaling Control', IEEE Transactions on Biomedical Circuits and Systems, 10, pp. 668 - 678,
    Journal articles | 2016
    Irfansyah AN; Nicholson AP; Iberzanov A; Jenkins J; Lehmann T; Hamilton TJ, 2016, 'Automatic tuning of digitally-controllable positive-feedback OTAs in continuous-time sigma–delta modulators', Analog Integrated Circuits and Signal Processing, 89, pp. 469 - 483,
    Journal articles | 2016
    Nicholson AP; Iberzanov A; Jenkins J; Hamilton TJ; Lehmann T, 2016, 'A Statistical Design Approach for a Digitally Programmable Mismatch-Tolerant High-Speed Nauta Structure Differential OTA in 65-nm CMOS', IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 24, pp. 2899 - 2910,
    Journal articles | 2016
    Rahman MT; Lehmann T, 2016, 'A cryogenic DAC operating down to 4.2 K', Cryogenics, 75, pp. 47 - 55,
    Journal articles | 2015
    Cook AJ; Gargiulo GD; Lehmann T; Hamilton TJ, 2015, 'Open platform, eight-channel, portable bio-potential and activity data logger for wearable medical device development', Electronics Letters, 51, pp. 1641 - 1643,
    Journal articles | 2015
    George L; Gargiulo GD; Lehmann T; Hamilton TJ, 2015, 'Concept design for a 1-lead wearable/implantable ECG front-end: Power management', Sensors (Switzerland), 15, pp. 29297 - 29315,
    Journal articles | 2014
    Chun H; Yang Y; Lehmann T, 2014, 'Safety ensuring retinal prosthesis with precise charge balance and low power consumption', IEEE Transactions on Biomedical Circuits and Systems, 8, pp. 108 - 118,
    Journal articles | 2014
    Das K; Lehmann T; Dzurak AS, 2014, 'Sub-nanoampere one-shot single electron transistor readout electrometry below 10 kelvin', IEEE Transactions on Circuits and Systems I: Regular Papers, 61, pp. 2816 - 2824,
    Journal articles | 2014
    Das K; Lehmann T, 2014, 'Effect of deep cryogenic temperature on silicon-on-insulator CMOS mismatch: A circuit designer's perspective', Cryogenics, 62, pp. 84 - 93,
    Journal articles | 2014
    Das K; Lehmann T, 2014, 'Simple front-end interfacing circuit for lowvoltage microelectronics', Electronics Letters, 50, pp. 349 - 351,
    Journal articles | 2014
    Lehmann T, 2014, 'Design of fast low-power floating high-voltage level-shifters', Electronics Letters, 50, pp. 202 - 204,
    Journal articles | 2013
    Afshar S; Cohen GK; Wang RM; Van Schaik A; Tapson J; Lehmann T; Hamilton TJ, 2013, 'The ripple pond: Enabling spiking networks to see', Frontiers in Neuroscience,
    Journal articles | 2013
    Jung LH; Shany N; Emperle A; Lehmann T; Byrnes-Preston P; Lovell NH; Suaning GJ, 2013, 'Design of safe two-wire interface-driven chip-scale neurostimulator for visual prosthesis', IEEE Journal of Solid-State Circuits, 48, pp. 2217 - 2229,
    Journal articles | 2013
    Yang Y; Chun H; Lehmann T, 2013, 'Dual-stacked current recycling linear regulators with 48% power saving for biomedical implants', IEEE Transactions on Circuits and Systems I: Regular Papers, 60, pp. 1946 - 1958,
    Journal articles | 2012
    Lehmann T; Chun H; Yang Y, 2012, 'Power Saving Circuit Design Techniques For Implantable Neuro-Stimulators', Journal of Circuits Systems and Computers, 21, pp. 1240016-2 - 1240016-14,
    Journal articles | 2011
    Moghe Y; Lehmann T; Piessens T, 2011, 'Nanosecond Delay Floating High Voltage Level Shifters in a 0.35um HV-CMOS Technology', IEEE Journal of Solid - State Circuits, 46, pp. 485 - 497,
    Journal articles | 2010
    Ekanayake SR; Lehmann T; Dzurak A; Clark RG; Brawley , 2010, 'Characterization of SOS-CMOS FETs at Low Temperatures for the Design of Integrated Circuits for Quantum Bit Control and Readout', IEEE Transactions on Electron Devices, 57, pp. 539 - 547,
    Journal articles | 2009
    Dommel NB; Wong YT; Lehmann T; Dodds CW; Suaning GJ; Lovell NH, 2009, 'A CMOS retinal neurostimulator capable of focused, simultaneous stimulation', Journal of neural engineering, 6, pp. 1 - 10
    Journal articles | 2007
    Wong YT; Dommel N; Preston P; Hallum LE; Lehmann T; Lovell NH; Suaning GJ, 2007, 'Retinal neurostimulator for a multifocal vision prosthesis', IEEE Transactions on Neural Systems and Rehabilitation Engineering, 15, pp. 425 - 434,
    Journal articles | 2007
    Wong YT; Dommel NB; Preston P; Hallum LE; Lehmann T; Lovell NH; Suaning GJ, 2007, 'Retinal neurostimulator for a multifocal vision prosthesis', IEEE Transactions on Neural Systems and Rehabilitation Engineering, 15, pp. 425 - 434
    Journal articles | 2005
    Lehmann T; Kwok CY; Hasan T, 2005, 'On-chip high voltage charge pump in standard low voltage CMOS process', Electronics Letters, 41, pp. 840 - 842
  • Conference Papers | 2023
    Yang R; Chen Y; Ladouceur F; Lovell NH; Abed AA; Lehmann T, 2023, 'Active Noise Cancelling Method for An Electro-Optical Detection System', in 2023 IEEE Nordic Circuits and Systems Conference, NorCAS 2023 - Proceedings,
    Conference Papers | 2020
    Silvestri L; Al Abed A; Revol ECM; Firth J; Wei Y; Wang H; Gouailhardou N; Lehmann T; Lovell NH; Ladouceur F, 2020, 'First biopotential recordings from a liquid crystal optrode', in Madsen SJ; Yang VXD; Thakor NV (eds.), Progress in Biomedical Optics and Imaging - Proceedings of SPIE, SPIE, the international society for optics and photonics, CA, San Francisco, pp. 1122505-1122505-4, presented at Clinical and Translational Neurophotonics 2020, CA, San Francisco, 01 February 2020 - 06 February 2020,
    Conference Papers | 2020
    Yang E; Lehmann T, 2020, 'On-Chip Digitally Controlled Operational Amplifier Characterisation Circuit without Additional Pins', in Midwest Symposium on Circuits and Systems, pp. 998 - 1002,
    Conference Papers | 2019
    Lehmann T, 2019, 'Cryogenic support circuits and systems for silicon quantum computers', in Proceedings - IEEE International Symposium on Circuits and Systems,
    Conference Papers | 2019
    Wei Y; Al Abed A; Gouailhardou N; Wang H; Lei X; Ladouceur F; Lehmann T; Lovell NH; Silvestri L, 2019, 'Optically measuring nerve activity based on an electro-optical detection system', in Goldys EM; Gibson BC (ed.), Proceedings of SPIE - The International Society for Optical Engineering. Biophotonics Australasia 2019, Society of Photo-optical Instrumentation Engineers, Melbourne, presented at ANZCOP, Melbourne, 08 December 2019 - 12 December 2019,
    Conference Papers | 2019
    Yang E; Lehmann T, 2019, 'High gain operational amplifiers in 22 nm CMOS', in Proceedings - IEEE International Symposium on Circuits and Systems,
    Patents | 2018
    Lehmann T; Lovell N; Jung L; Byrnes-Preston P; Suaning G; von Bock W, 2018, Method of power and data transfer in implantable electronic devices, Patent No. 2485801,
    Conference Papers | 2017
    Pham L; Irfansyah AN; Hamilton TJ; Lehmann T, 2017, 'The effect of source resistance on the linearity of Nauta structure OTA', in Midwest Symposium on Circuits and Systems, pp. 1208 - 1211,
    Conference Papers | 2016
    Aluthwala P; Weste N; Adams A; Lehmann T; Parameswaran S, 2016, 'The effect of amplitude resolution and mismatch on a digital-to-analog converter used for digital harmonic-cancelling sine-wave synthesis', in Proceedings - IEEE International Symposium on Circuits and Systems, IEEE, Montreal, CANADA, pp. 2018 - 2021, presented at IEEE International Symposium on Circuits and Systems (ISCAS), Montreal, CANADA, 22 May 2016 - 25 May 2016,
    Patents | 2016
    Lehmann T; Suaning G; Byrnes-Preston P, 2016, Method of Power and Data Transfer in Implantable Electronic Devices, Australia, Patent No. 2010306068
    Conference Papers | 2016
    Phoon DKH; Lehmann T; Hamilton TJ; Jenkins J, 2016, 'Hybrid dual-mode low voltage dropout regulator with infinite impulse response digital filters', in LASCAS 2016 - 7th IEEE Latin American Symposium on Circuits and Systems, R9 IEEE CASS Flagship Conference, Santa Catarina Florianopolis, SC, Brazil, pp. 195 - 198, presented at 2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS), Santa Catarina Florianopolis, SC, Brazil, 28 February 2016 - 02 March 2016,
    Conference Papers | 2015
    Alex AZ; Lehmann T, 2015, 'High-voltage tolerant switch configuration using standard 3.3-V 0.5-μm silicon-on-sapphire CMOS transistors', in IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS, pp. 591 - 594,
    Conference Papers | 2015
    Aluthwala PD; Lehmann T; Parameswaran S, 2015, 'Design of a Digital Harmonic-Cancelling Sine-Wave Synthesizer with 100 MHz Output Frequency, 43.5 dB SFDR, and 2.26 mW Power', in Proceedings - IEEE International Symposium on Circuits and Systems, Institute of Electrical and Electronics Engineers, Lisbon, Portugal, presented at International Symposium on Circuits and Systems, Lisbon, Portugal, 24 May 2015 - 27 May 2015
    Conference Papers | 2015
    Cook AJ; Gargiulo GD; Cook R; Ng B; Hindmarsh D; Lehmann T; Hamilton TJ, 2015, 'A novel method for non-invasive respiration monitoring', in Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS, pp. 4524 - 4527,
    Conference Papers | 2015
    Iberzanov A; Nicholson A; Jenkins J; Lehmann T; Hamilton TJ, 2015, 'Calibration of the Nauta structure differential OTA', in IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS, pp. 189 - 192,
    Conference Papers | 2015
    Irfansyah AN; Nicholson A; Jenkins J; Hamilton TJ; Lehmann T, 2015, 'Subthreshold operation of Nauta's operational transconductance amplifier', in Conference Proceedings - 13th IEEE International NEW Circuits and Systems Conference, NEWCAS 2015,
    Conference Papers | 2014
    Aluthwala P; Weste N; Adams A; Lehmann T; Parameswaran S, 2014, 'A simple digital architecture for a harmonic-cancelling sine-wave synthesizer', in Proceedings - IEEE International Symposium on Circuits and Systems, pp. 2113 - 2116,
    Conference Papers | 2014
    George L; Lehmann T; Hamilton TJ, 2014, 'A reconfigurable buck-boost switched capacitor converter architecture for multiple, distributed on-chip load applications', in 2014 IEEE 12th International New Circuits and Systems Conference, NEWCAS 2014, pp. 464 - 467,
    Conference Papers | 2014
    Irfansyah AN; Pham L; Nicholson A; Lehmann T; Jenkins J; Hamilton TJ, 2014, 'Nauta OTA in a second-order continuous-time delta-sigma modulator', in Midwest Symposium on Circuits and Systems, pp. 849 - 852,
    Conference Papers | 2014
    Nicholson A; Jenkins J; Van Schaik A; Hamilton TJ; Lehmann T, 2014, 'A digital to transconductance converter for nauta structure op-amps in 65nm CMOS', in Midwest Symposium on Circuits and Systems, pp. 173 - 176,
    Conference Papers | 2014
    Rahman MT; Lehmann T, 2014, 'A 10 bit cryogenic CMOS D/A converter', in Midwest Symposium on Circuits and Systems, pp. 9 - 12,
    Conference Papers | 2014
    Suaning GJ; Lovell NH; Lehmann T, 2014, 'Neuromodulation of the retina from the suprachoroidal space: The Phoenix 99 implant', in IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings, pp. 256 - 259,
    Preprints | 2013
    Afshar S; Cohen G; Wang R; van Schaik A; Tapson J; Lehmann T; Hamilton TJ, 2013, The Ripple Pond: Enabling Spiking Networks to See, ,
    Conference Papers | 2013
    Alex ; Lehmann T, 2013, 'High current driving charge pumps in distributed biomedical implants using silicon-on-sapphire technology', in Proc Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, IEEE, Columbus, OH, pp. 960 - 963, presented at Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, Columbus, OH, 04 August 2013 - 07 August 2013,
    Conference Papers | 2013
    Cooney T; Lehmann T; Parkinson K; Middleton R; Hall CD, 2013, 'Transmit/receive module for L-band phased array synthetic aperture radar with polarisation control', in 2013 International Conference on Radar - Beyond Orthodoxy: New Paradigms in Radar, RADAR 2013, pp. 167 - 172,
    Conference Papers | 2013
    Das K; Lehmann T; Rodrigues C, 2013, 'Accurate Sensor Readout Circuitry for Reliability Measurement of Hermetically Sealed Chip-Scale Biomedical Implants', in Proc Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, IEEE, Columbus, OH, pp. 325 - 328, presented at Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, Columbus, OH, 04 August 2013 - 07 August 2013,
    Conference Papers | 2013
    Das K; Lehmann T, 2013, 'Mismatch insensitive automatic tuning control for the single electron transistor readout circuit', in Proc Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, IEEE, Columbus, OH, pp. 728 - 731, presented at Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, Columbus, OH, 04 August 2013 - 07 August 2013,
    Conference Papers | 2013
    Irfansyah ; Lehmann T; Jenkins ; Hamilton , 2013, 'Design strategy for enhanced output impedance current-steering DAC in sigma-delta converters', in Proc Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, IEEE, Columbus, OH, pp. 289 - 292, presented at Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, Columbus, OH, 04 August 2013 - 07 August 2013,
    Conference Papers | 2013
    Irfansyah AN; Lehmann T; Jenkins J; Hamilton TJ, 2013, 'Analysis and design considerations of systematic nonlinearity for sigma-delta current-steering DAC', in IEEE 2013 Tencon - Spring, TENCONSpring 2013 - Conference Proceedings, pp. 108 - 111,
    Conference Papers | 2013
    Li X; Lehmann T, 2013, 'Design and simulation of an inductive link using fully integrated receiver coil in biomedical implants', in Proc Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, IEEE, Columbus, OH, pp. 956 - 959, presented at Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, Columbus, OH, 04 August 2013 - 07 August 2013,
    Conference Papers | 2013
    Nicholson A; Jenkins J; Irfansyah AN; Politi N; Van Schaik A; Hamilton TJ; Lehmann T, 2013, 'A 0.3mm2 10-b 100MS/s pipelined ADC using Nauta structure op-amps in 180nm CMOS', in Proceedings - IEEE International Symposium on Circuits and Systems, pp. 1833 - 1836,
    Conference Papers | 2013
    Rodgigues C; Alex ; Lehmann T, 2013, 'A 7.8V neurostimulator based on cascoded low-voltage Silicon-on-Sapphire MOS transistors', in Proc Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, IEEE, Columbus, OH, pp. 165 - 168, presented at Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, Columbus, OH, 04 August 2013 - 07 August 2013,
    Conference Papers | 2013
    Rodgigues C; Lehmann T; Das ; Suaning , 2013, 'A 2.6V Silicon-on Sapphire CMOS current imbalance sensing circuit for neurostimulation applications', in Proc Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, IEEE, Columbus, OH, pp. 971 - 974, presented at Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on, Columbus, OH, 04 August 2013 - 07 August 2013,
    Conference Papers | 2012
    Chun H; Yang Y; Lehmann T, 2012, 'Required matching accuracy of biphasic current pulse in multi-channel current mode bipolar stimulation for safety', in Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS, Institute of Electrical and Electronics Engineers Inc., Piscataway, USA, pp. 3025 - 3028, presented at 2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) Engineering in Medicine and Biology Society (EMBC), San Diego, California, USA, 28 August 2012 - 01 September 2012,
    Conference Papers | 2012
    George L; Lehmann T; Hamilton TJ, 2012, 'A reconfigurable buck-boost switched capacitor converter with adaptive gain and discrete frequency scaling control', Institute of Electrical and Electronics Engineers Inc., Seville, Spain, pp. 869 - 872, presented at 2012 19th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Seville, Spain, 09 December 2012 - 12 December 2012,
    Conference Papers | 2012
    George L; Lehmann T; Hamilton TJ, 2012, 'A synchronous buck-boost converter on a Silicon-On-Sapphire 0.5µm process', in IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS, Institute of Electrical and Electronics Engineers Inc., Kaohsiung, Taiwan, pp. 348 - 351, presented at 2012 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), Kaohsiung, Taiwan, 02 December 2012 - 05 December 2012,
    Conference Papers | 2012
    Lehmann T; Jung LH; Moghe YV; Chun H; Yang Y; Asish A, 2012, 'Low-power circuit structures for chip-scale stimulating implants', in IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS, Institute of Electrical and Electronics Engineers Inc., Kaohsiung, Taiwan, pp. 312 - 315, presented at 2012 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), Kaohsiung, Taiwan, 02 December 2012 - 05 December 2012,
    Conference Papers | 2012
    Nicholson APA; Jenkins J; van Schaik A; Hamilton TJ; Lehmann T, 2012, 'A 1.2V 2-bit phase interpolator for 65nm CMOS', in ISCAS 2012 - 2012 IEEE International Symposium on Circuits and Systems Proceedings, IEEE, Seoul, Korea, pp. 2039 - 2042, presented at 2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012, Seoul, Korea, 20 May 2012 - 23 May 2012,
    Conference Papers | 2012
    Politi AN; Jenkins J; van Schaik A; Lehmann T; Hamilton TJ, 2012, 'A method for measuring switching frequency using complex asynchronous logic circuits', in IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS, Institute of Electrical and Electronics Engineers Inc., Kaohsiung, Taiwan, pp. 679 - 682, presented at 2012 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), Kaohsiung, Taiwan, 02 December 2012 - 05 December 2012,
    Conference Papers | 2012
    Rahman MT; Lehmann T, 2012, 'Towards the implementation of a cryogenic D/A converter for silicon quantum computer controller', in 2012 IEEE 55th International Midwest Symposium on Circuits and Systems, MWSCAS 2012, Institute of Electrical and Electronics Engineers Inc, Piscataway, NJ, United States, pp. 1108 - 1111, presented at 2012 IEEE 55th International Midwest Symposium on Circuits and Systems, MWSCAS 2012, Boise, ID, United States, 05 August 2012 - 08 August 2012,
    Conference Papers | 2011
    Asish A; Lehmann T, 2011, 'Highly Efficient AC Power Transfer in Distributed Biomedical Implants Using Silicon-On-Sapphire Technology', in 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011, IEEE, Piscataway, NJ, United States, pp. Article number: 6026452, presented at 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011, Seoul, Korea, 07 August 2011 - 10 August 2011,
    Conference Papers | 2011
    Das K; Lehmann T, 2011, 'Low Power Fast Cryogenic CMOS Circuit for Digital Readout of Single Electron Transistor', in 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011, IEEE, Piscataway, NJ, United States, pp. Article number: 6026405, presented at 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011, Seoul, Korea, 07 August 2011 - 10 August 2011,
    Conference Papers | 2011
    Guenther T; Mintri A; Lim W; Jung LH; Lehmann T; Lovell NH; Suaning GJ, 2011, 'Laser-micromachined, Chip-scaled Ceramic Carriers for Implantable Neurostimulators', in Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS, IEEE, Piscataway, NJ, United States, pp. 1085 - 1088, presented at 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2011, Boston, Massachusetts USA, 30 August 2011 - 03 September 2011
    Conference Papers | 2011
    Guenther T; Mintri A; Lim WW; Jung LH; Lehmann T; Lovell NH; Suaning GJ, 2011, 'Laser-micromachined, chip-scaled ceramic carriers for implantable neurostimulators', in Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS, pp. 1085 - 1088,
    Conference Papers | 2011
    Jung LH; Lehmann T; Suaning GJ; Lovell NH, 2011, 'A Semi-static Threshold-triggered Delay Element for Low Power Applications', in 2011 IEEE International Symposium of Circuits and Systems, ISCAS 2011, IEEE, Piscataway, NJ, United States, pp. 833 - 836, presented at 2011 IEEE International Symposium of Circuits and Systems, ISCAS 2011, Rio de Janeiro, Brazil, 15 May 2011 - 18 May 2011,
    Conference Papers | 2011
    Jung LH; Shany N; Lehmann T; Preston P; Lovell NH; Suaning GJ, 2011, 'Towards a Chip Scale Neurostimulator: System Architecture of a Current-Driven 98 Channel Neurostimulator via a Two-Wire Interface', in Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS, IEEE, Piscataway, NJ, United States, pp. 6737 - 6740, presented at 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2011, Boston, Massachusetts USA, 30 August 2011 - 03 September 2011
    Conference Papers | 2011
    Jung LH; Shany N; Lehmann T; Preston P; Lovell NH; Suaning GJ, 2011, 'Towards a chip scale neurostimulator: System architecture of a current-driven 98 channel neurostimulator via a two-wire interface', in Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS, pp. 6737 - 6740,
    Conference Papers | 2011
    Lehmann T; Chun H; Yang Y, 2011, 'Power Saving Design Techniques for Implantable Neuro-stimulators', in 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011, IEEE, Piscataway, NJ, United States, pp. Article number: 6026470, presented at 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011, Seoul, Korea, 07 August 2011 - 10 August 2011,
    Conference Papers | 2011
    Yang Y; Lehmann T; Chun H, 2011, 'Design of Reliable Current Recycling Linear Regulators for Biomedical Implants', in 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011, IEEE, Piscataway, NJ, United States, pp. Article number: 6026522, presented at 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011, Seoul, Korea, 07 August 2011 - 10 August 2011,
    Conference Papers | 2011
    Yang Y; Lehmann T, 2011, 'Design of Multiple-Stacked Current Recycling Linear Regulators for Biomedical Implants', in 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011, IEEE, Piscataway, NJ, United States, pp. Article number:6026524, presented at 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011, Seoul, Korea, 07 August 2011 - 10 August 2011,
    Conference Papers | 2010
    Chun H; Lehmann T; Yang Y, 2010, 'Implantable Stimulator for Bipolar Stimulation Without Charge Balancing Circuits', in Proceedings of the 2010 IEEE Biomedical Circuits and Systems Conference, IEEE, Piscataway, NJ, USA, pp. 202 - 205, presented at 2010 IEEE Biomedical Circuits and Systems Conference, Paphos, Cyprus, 03 November 2010 - 05 November 2010,
    Conference Papers | 2010
    Chun H; Lehmann T, 2010, 'A Power Efficient Programmable Gain Boosting Current Mirror for Biomedical Electronics', in Proceedings of the 2010 IEEE Biomedical Circuits and Systems Conference, IEEE, Piscataway, NJ, USA, pp. 226 - 229, presented at 2010 IEEE Biomedical Circuits and Systems Conference, Paphos, Cyprus, 03 November 2010 - 05 November 2010,
    Conference Papers | 2010
    Chun H; Lehmann T, 2010, 'CMOS Current Reference Generator Using Integrated Resistors', in 2010 International Conference on Electronics and Information Engineering, IEEE, Piscataway, NJ, USA, presented at International Conference on Electronics and Information Engineering, Kyoto, Japan, 01 August 2010 - 03 August 2010,
    Conference Papers | 2010
    Das K; Lehmann T; Rahman MT, 2010, '4.2K CMOS Circuit Design For Digital Readout Of Single Electron Transistor Electrometry', in 2010 53rd IEEE International Midwest Symposium on Circuits and Systems, IEEE, Piscataway, NJ, USA, presented at 53rd IEEE International Midwest Symposium on Circuits and Systems, Seattle, WA, USA, 01 August 2010 - 04 August 2010,
    Conference Papers | 2010
    Das K; Lehmann T, 2010, 'SOS current mirror matching at 4K: A brief study', in 2010 IEEE International Symposium on Circuits and Systems. ISCAS 2010, IEEE, Piscataway, NJ, USA, presented at IEEE International Symposium on Circuits and Systems, Paris, France, 30 May 2010 - 02 June 2010,
    Conference Papers | 2010
    George L; Lehmann T; Hamilton TJ, 2010, 'Reusable Power Supply ICs for E-Waste Reduction in Mobile Consumer Electronics', GSTF, Singapore, pp. 17 - 24, presented at Annual International Conference on Green Information Technology, Singapore
    Conference Papers | 2010
    Lehmann T; Chun H; Preston P; Suaning GJ, 2010, 'Current-limited passive charge recovery for implantable neuro-stimulators: Power savings, modelling and characterisation', IEEE, USA, presented at IEEE International Symposium on Circuits and Systems, Paris, France, 30 May 2010 - 02 June 2010
    Conference Papers | 2010
    Lehmann T; Hamilton TJ, 2010, 'Integrated circuits towards reducing e-waste: future design directions', in 2010 International Conference on Green Circuits and Systems (ICGCS 2010), IEEE, Piscataway, NJ, USA, presented at International Conference on Green Circuits and Systems, Shanghai, China, 21 June 2010 - 23 June 2010,
    Conference Papers | 2010
    Rahman MT; Lehmann T, 2010, 'A cryogenic D/A converter with novel charge injection reduction technique for silicon quantum computer controller circuit', in Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010, Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ, United States, pp. 1151 - 1154, presented at 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010, Kuala Lumpur, Malaysia, 06 December 2010 - 09 December 2010,
    Conference Papers | 2010
    Yang Y; Lehmann T, 2010, 'Current recycling in linear regulators for biomedical implants', in 2010 53rd IEEE International Midwest Symposium on Circuits and Systems, IEEE, Piscataway, NJ, USA, presented at 53rd IEEE International Midwest Symposium on Circuits and Systems, Seattle, WA, USA, 01 August 2010 - 04 August 2010,
    Conference Papers | 2009
    Kim C; Lehmann T; Nooshabadi SV, 2009, 'An Ultra-Wideband transceiver for biotelemetry systems - art. no. 67980A', in Proceedings of SPIE Volume 7503, SPIE, Washington, USA, presented at 20th International Conference on Optical Fibre Sensors, Edinburgh, United Kingdom, 05 October 2009
    Conference Papers | 2008
    Ekanayake SR; Lehmann T; Dzurak A; Clark RG, 2008, 'Qubit control-pulse generator circuits for operation at cryogenic temperatures', in Proc. 8th IEEE International Conference on Nanotechnology, Texas USA, pp. 472 - 474, presented at 8th IEEE International Conference on Nanotechnology, Texas USA, 18 August 2008 - 21 August 2008
    Conference Papers | 2008
    Irfansyah AN; Lehmann T; Nooshabadi SV, 2008, 'Comparison framework for low swing on-chip interconnect circuits', in Proceedings of SPIE Volume 7503, SPIE, Washington, USA, presented at SPIE 2008, Orlando, Florida, USA, 17 March 2008 - 19 March 2008,
    Conference Papers | 2008
    Irfansyah AN; Lehmann T; Nooshabadi SV, 2008, 'Energy delay optimization methodology for current-mode signaling for on-chip interconnects', in Proceedings - 2008 IEEE International Conference on Integrated Circuit Design and Technology, ICICDT, presented at IEEE International Conference on Integrated Circuit Design and Technology, ICICDT 2008, 02 June 2008 - 04 June 2008
    Conference Papers | 2008
    Kim C; Lehmann T; Nooshabadi SV, 2008, 'A 15pJ/pulse all-digital UWB pulse generator with pulse tuning capability', in 2008 IEEE International 51st Midwest Symposium on Circuits and Systems, MWSCAS, presented at IEEE International 51st Midwest Symposium on Circuits and Systems, MWSCAS 2008, 10 August 2008 - 13 August 2008
    Conference Papers | 2008
    Kim C; Lehmann T; Nooshabadi SV, 2008, 'An ultra-wideband transceiver for biotelemetry systems', in Proceedings of SPIE Volume 7503, SPIE, Washington, USA, presented at SPIE 2008, Orlando, Florida, USA, 17 March 2008 - 19 March 2008,
    Conference Papers | 2008
    Kim C; Nooshabadi SV; Lehmann T, 2008, 'An UWB system for wireless endoscope', in Feature extraction using an AM-FM model for gait pattern classification, Baltimore, presented at IEEE Biomedical Circuits and Systems Conference, Baltimore, 20 November 2008 - 22 November 2008
    Conference Papers | 2008
    Lehmann T; Lovell NH; Suaning GJ; Preston P; Wong YT; Dommel NB; Jung L; Moghe YV; Das K, 2008, 'Implant electronics for intraocular epiretinal neuro-stimulators', in 2008 IEEE international symposium on circuits and systems, Seattle, Washington, USA, presented at IEEE international symposium on circuits and systems 2008, Seattle, Washington, USA, 18 May 2008 - 21 May 2008
    Conference Papers | 2008
    Moghe YV; Lehmann T, 2008, 'A novel safety system concept and implementation for implantable stimulators: A universal DC tissue leakage current detector', in 2008 IEEE international symposium on circuits and systems, Seattle, Washington, USA, presented at IEEE international symposium on circuits and systems 2008, Seattle, Washington, USA, 18 May 2008 - 21 May 2008
    Conference Papers | 2007
    Ekanayake SR; Lehmann T; Dzurak AS; Clark RG, 2007, 'Quantum bit controller and observer circuits in SOS-CMOS technology for gigahertz low-temperature operation', in 2007 7TH IEEE CONFERENCE ON NANOTECHNOLOGY, VOL 1-3, IEEE, PEOPLES R CHINA, Hong Kong, pp. 1294 - +, presented at 7th IEEE Conference on Nanotechnology, PEOPLES R CHINA, Hong Kong, 02 August 2007 - 05 August 2007,
    Conference Papers | 2007
    Ekanayake SR; Lehmann T; Dzurak AS; Clark RG, 2007, 'Quantum bit controller and observer circuits in SOS-CMOS technology for gigahertz low-temperature operation', in 2007 7th IEEE International Conference on Nanotechnology - IEEE-NANO 2007, Proceedings, pp. 1283 - 1287,
    Conference Papers | 2007
    Irfansyah AN; Lehmann T; Nooshabadi S, 2007, 'Energy optimization for current-mode signaling in high-speed on-chip interconnects', in 2007 International Conference on Intelligent and Advanced Systems, ICIAS 2007, pp. 1306 - 1311,
    Conference Papers | 2007
    Jung LH; Byrnes-Preston P; Hessler R; Lehmann T; Suaning GJ; Lovell NH, 2007, 'A dual band wireless power and FSK data telemetry for biomedical implants', in Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings, pp. 6596 - 6599,
    Conference Papers | 2007
    Jung LH; Byrnes-Preston P; Hessler R; Lehmann T; Suaning GJ; Lovell NH, 2007, 'A dual band wireless power and FSK data telemetry for biomedical implants.', in Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, pp. 6597 - 6600
    Conference Papers | 2007
    Jung LH; Byrnes-Preston PJ; Hessler R; Lehmann T; Suaning GJ; Lovell NH, 2007, 'A dual band wireless power and FSK data telemetry for biomedical implants', in >, Honolulu, Hawaii, presented at IEEE Symposium on Computational Intelligence in Defence and Security Applications, Honolulu, Hawaii, 01 April 2007 - 04 April 2007,
    Conference Papers | 2007
    Kim C; Lehmann T; Nooshabadi SV; Nevat I, 2007, 'An ultra-wideband transceiver architecture for wireless endoscope', in 2007 International Symposium on Communications and Information Technologies (ISCIT 2007), Sydney, presented at International Symposium on Communications and Information Technologies (ISCIT 2007) 2007, Sydney, 16 October 2007 - 19 October 2007
    Conference Papers | 2007
    Lehmann T; Renneberg CP, 2007, 'Analog circuits for thermistor linearization with chebyshev-optimal linearity error', in European Conference on Circuit Theory and Design, Sevilla, presented at European Conference on Circuit Theory and Design 2007, Sevilla, 26 August 2007 - 30 August 2007
    Conference Papers | 2007
    Lehmann T; Wheatley D, 2007, 'Electrically evoked compound action potential (ECAP) stimulus-artefact (SA) blanking low-power low-noise CMOS amplifier', in Mid-West Symposium on Circuits and Systems, Montreal, Canada, pp. 41 - 44, presented at Mid-West Symposium on Circuits and Systems, Montreal, Canada, 05 August 2007 - 08 August 2007
    Conference Papers | 2006
    Dommel N; Wong YT; Lehmann T; Byrnes-Preston P; Lovell NH; Suaning GJ, 2006, 'Microelectronic retinal prosthesis: II. Use of high-voltage CMOS in retinal neurostimulators.', in Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, pp. 4651 - 4654
    Conference Papers | 2006
    Dommel N; Wong YT; Preston PJ; Lehmann T; Lovell NH; Suaning GJ, 2006, 'The design and testing of an epi-retinal vision prosthesis neurostimulator capable of concurrent parallel stimulation.', in Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, pp. 4700 - 4709
    Conference Papers | 2006
    Dommel NB; Wong YT; Lehmann T; Byrnes-Preston PJ; Lovell NH; Suaning GJ, 2006, 'Microelectronic Retinal Prosthesis: II. Use of High-Voltage CMOS in Retinal Neurostimulators', in 28th IEEE EMBS Annual International Conference, New York City, New York, presented at 28th IEEE EMBS Annual International Conference, New York City, New York, 30 August 2006 - 03 September 2006
    Conference Papers | 2006
    Wong YT; Dommel N; Preston PJ; Lehmann T; Lovell NH; Suaning GJ, 2006, 'Microelectronic retinal prosthesis: I. A neurostimulator for the concurrent activation of multiple electrodes.', in Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, pp. 4647 - 4650
    Conference Papers | 2005
    Dommel NB; Suaning GJ; Preston P; Lehmann T; Lovell NH, 2005, 'In-vitro testing of simultaneous charge injection and recovery in a retinal neuroprosthesis', in 27th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2005), IEEE, United States, presented at 27th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC`05), Shanghai, China, 01 September 2005 - 04 September 2005
    Conference Papers | 2005
    Lehmann T; Hasan T; Kwok CY, 2005, 'A 5V Charge Pump in a standard 1.8-V 0.18-um CMOS process', in IEEE International Symposium on Circuits and Systems (ISCAS 2005), Kobe, Japan, presented at IEEE International Symposium on Circuits and Systems 2005, Kobe, Japan, 23 May 2005 - 26 May 2005
    Conference Papers | 2005
    Lehmann T; Moghe Y, 2005, 'On-Chip Active Power Rectifiers for Biomedical Applications', in IEEE International Symposium on Circuits and Systems (ISCAS 2005), Kobe, Japan, presented at IEEE International Symposium on Circuits and Systems 2005, Kobe, Japan, 23 May 2005 - 26 May 2005
    Conference Papers | 2005
    Lovell NH; Dokos S; Preston P; Lehmann T; Dommel NB; Lin AZ; Wong YT; Opie N; Hallum LE; Chen SC; Suaning GJ, 2005, 'A retinal neuroprosthesis design based on simultaneous current injection', in 3rd Annual International IEEE EMBS Special Topic Conference on Microtechnologies in Medicine and Biology, Kahuku, Hawaii, presented at 3rd Annual International IEEE EMBS Special Topic Conference on Microtechnologies in Medicine and Biology, Kahuku, Hawaii, 12 May 2005 - 15 May 2005