By Associate Professor Torsten Lehmann

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, 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, 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, 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

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

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