Select Publications

Conference Papers

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, http://dx.doi.org/10.1109/NorCAS58970.2023.10305459

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, http://dx.doi.org/10.1109/MWSCAS48704.2020.9184530

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 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, http://dx.doi.org/10.1117/12.2540053

Lehmann T, 2019, 'Cryogenic support circuits and systems for silicon quantum computers', in Proceedings - IEEE International Symposium on Circuits and Systems, http://dx.doi.org/10.1109/ISCAS.2019.8702413

Silvestri L; Al Abed A; Revol ECM; Firth J; Wei Y; Wang H; Gouailhardou N; Lehmann T; Lovell NH; Ladouceur F, 2019, 'First biopotential recordings from a liquid crystal optrode', in Progress in Biomedical Optics and Imaging - Proceedings of SPIE, http://dx.doi.org/10.1117/12.2544087

Yang E; Lehmann T, 2019, 'High gain operational amplifiers in 22 nm CMOS', in Proceedings - IEEE International Symposium on Circuits and Systems, http://dx.doi.org/10.1109/ISCAS.2019.8702381

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, http://dx.doi.org/10.1109/MWSCAS.2017.8053146

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, http://dx.doi.org/10.1109/ISCAS.2016.7538973

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, http://dx.doi.org/10.1109/LASCAS.2016.7451043

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, http://dx.doi.org/10.1109/EMBC.2015.7319400

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, http://dx.doi.org/10.1109/NEWCAS.2015.7182065

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

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, http://dx.doi.org/10.1109/APCCAS.2014.7032753

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, http://dx.doi.org/10.1109/APCCAS.2014.7032850

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, http://dx.doi.org/10.1109/BioCAS.2014.6981711

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, http://dx.doi.org/10.1109/NEWCAS.2014.6934083

Rahman MT; Lehmann T, 2014, 'A 10 bit cryogenic CMOS D/A converter', in Midwest Symposium on Circuits and Systems, pp. 9 - 12, http://dx.doi.org/10.1109/MWSCAS.2014.6908339

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, http://dx.doi.org/10.1109/MWSCAS.2014.6908380

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, http://dx.doi.org/10.1109/MWSCAS.2014.6908548

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, http://dx.doi.org/10.1109/ISCAS.2014.6865584

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, http://dx.doi.org/10.1109/RADAR.2013.6651979

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, http://dx.doi.org/10.1109/TENCONSpring.2013.6584427

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, http://dx.doi.org/10.1109/ISCAS.2013.6572222

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, http://dx.doi.org/10.1109/MWSCAS.2013.6674813

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, http://dx.doi.org/10.1109/MWSCAS.2013.6674611

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, http://dx.doi.org/10.1109/MWSCAS.2013.6674651

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, http://dx.doi.org/10.1109/MWSCAS.2013.6674809

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, http://dx.doi.org/10.1109/MWSCAS.2013.6674642

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, http://dx.doi.org/10.1109/MWSCAS.2013.6674810

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, http://dx.doi.org/10.1109/MWSCAS.2013.6674752

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, http://dx.doi.org/10.1109/ICECS.2012.6463550

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, http://dx.doi.org/10.1109/APCCAS.2012.6419126

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, http://dx.doi.org/10.1109/APCCAS.2012.6419043

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, http://dx.doi.org/10.1109/APCCAS.2012.6419034

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, http://dx.doi.org/10.1109/EMBC.2012.6346601

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, http://dx.doi.org/10.1109/MWSCAS.2012.6292218

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, http://dx.doi.org/10.1109/ISCAS.2012.6271681

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, http://dx.doi.org/10.1109/IEMBS.2011.6090253

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, http://dx.doi.org/10.1109/IEMBS.2011.6091662

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

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

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, http://dx.doi.org/10.1109/MWSCAS.2011.6026524

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, http://dx.doi.org/10.1109/MWSCAS.2011.6026522

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, http://dx.doi.org/10.1109/MWSCAS.2011.6026452

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, http://dx.doi.org/10.1109/MWSCAS.2011.6026405

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, http://dx.doi.org/10.1109/MWSCAS.2011.6026470

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, http://dx.doi.org/10.1109/ISCAS.2011.5937695

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, http://dx.doi.org/10.1109/APCCAS.2010.5774978

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, http://dx.doi.org/10.1109/BIOCAS.2010.5709612

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, http://dx.doi.org/10.1109/BIOCAS.2010.5709606


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