By Associate Professor Torsten Lehmann

Book Chapters

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, http://dx.doi.org/10.1007/978-1-4614-3447-4_5

Lehmann T; Aluthwala P; Parameswaran S, 2019, 'Digitally enhanced digital-to-analogue converters', in Digitally Enhanced Mixed Signal Systems, pp. 227 - 254

Lehmann T; van Schaik A, 2018, 'Implantable hearing interfaces', in Living Machines: A Handbook of Research in Biomimetic and Biohybrid Systems, pp. 520 - 525, http://dx.doi.org/10.1093/oso/9780199674923.003.0054

McEwan A; Gargiulo GD; Fornusek C; Lehmann T, 2017, 'Bioelectronics', in Encyclopedia of Computer Science and Technology, CRC Press, pp. 172 - 185, http://dx.doi.org/10.1201/9781315115894-22

Lehmann T; Jung LH; Suaning GJ; Lovell NH, 2015, 'Visual Stimulation Systems', in Handbook of Biochips, Springer Nature, pp. 1 - 23, http://dx.doi.org/10.1007/978-1-4614-6623-9_5-1

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

Ladouceur F; Al Abed A; Lehmann T; Almasri RM; Firth J; Lovell NH, 2024, 'All optical neural interfaces', Applied Optics, 63, pp. D21 - D27, http://dx.doi.org/10.1364/AO.512480

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, pp. 031503, http://dx.doi.org/10.1063/5.0153753

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, http://dx.doi.org/10.1109/JLT.2023.3250827

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, pp. 056031, http://dx.doi.org/10.1088/1741-2552/ac8ed6

Almasri RM; Abed AA; Wei Y; Wang H; Firth J; Poole-Warren LA; Ladouceur F; Lehmann T; Lovell NH; Al Abed A, 2022, 'Impedance Properties of Multi-Optrode Biopotential Sensing Arrays', IEEE Transactions on Biomedical Engineering, 69, pp. 1674 - 1684, http://dx.doi.org/10.1109/TBME.2021.3126849

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, http://dx.doi.org/10.1364/OE.426503

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, http://dx.doi.org/10.1007/s10470-018-1240-3

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, http://dx.doi.org/10.1016/j.mejo.2018.01.004

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, http://dx.doi.org/10.1016/j.medengphy.2017.12.008

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, http://dx.doi.org/10.1109/TCSII.2016.2631489

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, http://dx.doi.org/10.1109/TVLSI.2017.2657885

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, http://dx.doi.org/10.1109/TCSI.2016.2613938

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, http://dx.doi.org/10.1007/s10470-016-0820-3

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, http://dx.doi.org/10.1109/TVLSI.2016.2526048

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, http://dx.doi.org/10.1109/TBCAS.2015.2480035

Rahman MT; Lehmann T, 2016, 'A cryogenic DAC operating down to 4.2 K', Cryogenics, 75, pp. 47 - 55, http://dx.doi.org/10.1016/j.cryogenics.2016.02.003

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, http://dx.doi.org/10.3390/s151129297

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, http://dx.doi.org/10.1049/el.2015.2764

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, http://dx.doi.org/10.1109/TCSI.2014.2321196

Das K; Lehmann T, 2014, 'Simple front-end interfacing circuit for lowvoltage microelectronics', Electronics Letters, 50, pp. 349 - 351, http://dx.doi.org/10.1049/el.2013.3523

Lehmann T, 2014, 'Design of fast low-power floating high-voltage level-shifters', Electronics Letters, 50, pp. 202 - 204, http://dx.doi.org/10.1049/el.2013.2270

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, http://dx.doi.org/10.1016/j.cryogenics.2014.04.014

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, http://dx.doi.org/10.1109/TBCAS.2013.2257171

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, http://dx.doi.org/10.3389/fnins.2013.00212

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, http://dx.doi.org/10.1109/JSSC.2013.2264136

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, http://dx.doi.org/10.1109/TCSI.2012.2226489

Visca E; Gisin S; Hoesli I; Lehmann T; Granado C; Troeger C, 2012, 'O721 MATERNAL COLONIZATION WITH GROUP B STREPTOCOCCI AND CORD BLOOD DONATION', International Journal of Gynecology & Obstetrics, 119, pp. s514 - s514, http://dx.doi.org/10.1016/s0020-7292(12)61151-5

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, http://dx.doi.org/10.1142/S0218126612400166

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, http://dx.doi.org/10.1109/JSSC.2010.2091322

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, http://dx.doi.org/10.1109/TED.2009.2037381

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

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, http://dx.doi.org/10.1109/TNSRE.2007.903958

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

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

Nielsen JH; Lehmann T, 2003, 'An Implantable CMOS Amplifier for Nerve Signals', Analog Integrated Circuits and Signal Processing, 36, pp. 153 - 164, http://dx.doi.org/10.1023/a:1024422319674

LEHMANN T; CASSIA M, 2002, '1 V OTA USING CURRENT DRIVEN BULK CIRCUITS', Journal of Circuits System and Computers, 11, pp. 81 - 91, http://dx.doi.org/10.1142/s0218126602000252

Lehmann T; Cassia M, 2001, '1-V Power Supply CMOS Cascode Amplifier', IEEE Journal of Solid-State Circuits, 36, pp. 1082, http://dx.doi.org/10.1109/4.933464

Lehmann T; Woodburn R, 1999, 'Biologically-Inspired On-Chip Learning in Pulsed Neural Networks', Analog Integrated Circuits and Signal Processing, 18, pp. 117 - 131, http://dx.doi.org/10.1023/a:1008398919379

Lehmann T, 1998, 'Using current steering logic in mixedanalogue-digital circuits', Electronics Letters, 34, pp. 1660 - 1661, http://dx.doi.org/10.1049/el:19981177

Lehmann T, 1998, 'Classical conditioning with pulsed integrated neural networks: circuits and system', IEEE Transactions on Circuits and Systems I Regular Papers, 45, pp. 720 - 728, http://dx.doi.org/10.1109/82.686691

Lehmann T; Bruun E; Dietrich C, 1996, 'Mixed analog/digital matrix-vector multiplier for neural network synapses', Analog Integrated Circuits and Signal Processing, 9, pp. 55 - 63, http://dx.doi.org/10.1007/bf00158852

LEHMANN T, 1993, 'A HARDWARE EFFICIENT CASCADABLE CHIP SET FOR ANN'S WITH ON-CHIP BACKPROPAGATION', International Journal of Neural Systems, 4, pp. 351 - 358, http://dx.doi.org/10.1142/s0129065793000298

Lansner JA; Lehmann T, 1993, 'An analog CMOS chip set for neural networks with arbitrary topologies', IEEE Transactions on Neural Networks and Learning Systems, 4, pp. 441 - 444, http://dx.doi.org/10.1109/72.217186

Conference Papers

Xing Y; Lehmann T, 2026, 'A 3V High Gain Three-Stage Fully Differential Operational Amplifier in Flexible TFT Technology', in 2026 IEEE 17th Latin American Symposium on Circuits and Systems Lascas 2026 Proceedings, http://dx.doi.org/10.1109/LASCAS67804.2026.11457121

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