Publications

Key Journals

1.H. Zhang, M. Berkhout, K. A. A. Makinwa and Q. Fan, "A 120.9-dB DR Digital-Input Capacitively Coupled Chopper Class-D Audio Amplifier," in IEEE Journal of Solid-State Circuits, vol. 58, no. 12, pp. 3470-3480, Dec. 2023, doi: 10.1109/JSSC.2023.3318731. (Invited paper)

2.A. Jouyaeian, Q. Fan, U. Ausserlechner, M. Motz and K. A. A. Makinwa, "A Hybrid Magnetic Current Sensor With a Dual Differential DC Servo Loop," in IEEE Journal of Solid-State Circuits, vol. 58, no. 12, pp. 3442-3449, Dec. 2023, doi: 10.1109/JSSC.2023.3307471. (Invited paper)

3.A. Jouyaeian, Q. Fan, R. Zamparette, U. Ausserlechner, M. Motz and K. A. A. Makinwa, "A Hybrid Magnetic Current Sensor With a Multiplexed Ripple-Reduction Loop," in IEEE Journal of Solid-State Circuits, vol. 58, no. 10, pp. 2874-2882, Oct. 2023, doi: 10.1109/JSSC.2023.3273389.

4.H. Zhang, M. Berkhout, K. A. A. Makinwa and Q. Fan, "A 121.4-dB DR Capacitively Coupled Chopper Class-D Audio Amplifier," in IEEE Journal of Solid-State Circuits, vol. 57, no. 12, pp. 3736-3745, Dec. 2022, doi: 10.1109/JSSC.2022.3207907. (Invited paper)

5.S. Karmakar, M. Berkhout, K. A. A. Makinwa and Q. Fan, "A −91 dB THD+N, Class-D Piezoelectric Speaker Driver Using Dual Voltage/Current Feedback for Resistor-Less LC Resonance Damping," in IEEE Journal of Solid-State Circuits, vol. 57, no. 12, pp. 3726-3735, Dec. 2022, doi: 10.1109/JSSC.2022.3207386. (Invited paper)

6.H. Zhang, N. N. M. Rozsa, M. Berkhout and Q. Fan, "A Chopper Class-D Amplifier for PSRR Improvement Over the Entire Audio Band," in IEEE Journal of Solid-State Circuits, vol. 57, no. 7, pp. 2035-2044, July 2022, doi: 10.1109/JSSC.2022.3161136. (Invited paper)

7.H. Zhang, M. Berkhout, K. A.A. Makinwa and Q. Fan, "A -121.5-dB THD Class-D Audio Amplifier With 49-dB LC Filter Nonlinearity Suppression," in IEEE Journal of Solid-State Circuits (JSSC), doi: 10.1109/JSSC.2021.3125526. (Invited paper)

8.H. Zhang, S. Karmakar, L. J. Breems, Q. Sandifort, M. Berkhout, K. A.A. Makinwa, Q. Fan, “A High-Linearity and Low-EMI Multilevel Class-D Amplifier,” in IEEE Journal of Solid-State Circuits (JSSC), vol. 56, no. 4, pp. 1176-1185, April 2021, doi: 10.1109/JSSC.2020.3043815. (Invited paper)

9.S. Karmakar, H. Zhang, R. van Veldhoven, L. J. Breems, M. Berkhout, Q. Fan, K. A.A. Makinwa, “A 28-W,− 102.2-dB THD+ N Class-D Amplifier Using a Hybrid ΔΣM-PWM Scheme,” in IEEE Journal of Solid-State Circuits (JSSC), vol. 55, no. 12, pp. 3146-3156, Dec. 2020, doi: 10.1109/JSSC.2020.3023874. (Invited paper)

10.J. Xu, Q. Fan, J. H. Huijsing, C. Van Hoof, R. F. Yazicioglu and K. A. A. Makinwa, "Measurement and Analysis of Current Noise in Chopper Amplifiers," in IEEE Journal of Solid-State Circuits, vol. 48, no. 7, pp. 1575-1584, July 2013. (Invited paper)

11.Q. Fan, F. Sebastiano, J. H. Huijsing, K. A.A. Makinwa, “A 1.8 W 60 nV/√Hz Capacitively-Coupled Chopper Instrumentation Ampliﬁer in 65 nm CMOS for Wireless Sensor Nodes”, in IEEE Journal of Solid-State Circuits (JSSC), Vol. 47, No. 2, pp 464-475, Feb. 2011, doi: 10.1109/JSSC.2011.2143610. (Invited paper)

12.Q. Fan, J. H. Huijsing, K. A.A. Makinwa, “A 21nV/√Hz Chopper-Stabilized Multi-path Current-Feedback Instrumentation Amplifier with 2µV Offset”, in IEEE Journal of Solid-State Circuits (JSSC), vol. 47, no. 2, pp. 464-475, Feb. 2012, doi: 10.1109/JSSC.2011.2175269.

Key Conference Papers

1.Huajun Zhang, Haochun Fan, Miao Zhang, Marco Berkhout, Qinwen Fan, “A -106.3dB THD+N Feedback-After-LC Class-D Audio Amplifier Employing Current Feedback to Enable 530kHz LC-Filter Cut-Off Frequency,” IEEE International Solid-State Circuits Conference (ISSCC), 2024

2.Huajun Zhang, Mingshuang Zhang, Mengying Chen, Arthur Admiraal, Miao Zhang, Marco Berkhout, Qinwen Fan, “A 121.7dB DR and -109.0dB THD+N Filterless Digital-Input Class-D Amplifier with an HV Multibit IDAC Using Tri-level Output and Employing a Transition-Rate-Balanced Bidirectional RTDEM Scheme,” IEEE International Solid-State Circuits Conference (ISSCC), 2024

3.S. Karmakar, H. Zhang, M. Berkhout and Q. Fan, "A Class-D Piezoelectric Speaker Driver Using A Quadrature Feedback Chopping Scheme achieving 29dB Large-Signal THD+N Improvement," 2023 IEEE Symposium on VLSI Technology and Circuit, Kyoto, Japan, 2023, pp. 1-2. doi: 10.23919/VLSITechnologyandCir57934.2023.10185166.

4.M. Chen, H. Zhang and Q. Fan, "A 155W −95.6 dB THD+N GaN-based Class-D Audio Amplifier With LC Filter Nonlinearity Compensation," 2023 IEEE Applied Power Electronics Conference and Exposition (APEC), Orlando, FL, USA, 2023, pp. 1207-1210, doi: 10.1109/APEC43580.2023.10131323.

5.H. Zhang, M. Berkhout, K. A. A. Makinwa and Q. Fan, "3.1 A 120.9dB DR, -111.2dB THD+N Digital-Input Capacitively-Coupled Chopper Class-D Audio Amplifier," 2023 IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, 2023, pp. 54-56, doi: 10.1109/ISSCC42615.2023.10067400.

6.A. Jouyaeian, Q. Fan, M. Motz, U. Ausserlechner and K. A. A. Makinwa, "23.3 A 51A Hybrid Magnetic Current Sensor with a Dual Differential DC Servo Loop and 43mArms Resolution in a 5MHz Bandwidth," 2023 IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, 2023, pp. 22-24, doi: 10.1109/ISSCC42615.2023.10067677.

7.Huajun Zhang, Marco Berkhout, Kofi A. A. Makinwa and Qinwen Fan, " A 121.4 dB DR -109.8 dB THD+N Capacitively-Coupled Chopper Class-D Audio Amplifier," IEEE International Solid-State Circuits Conference (ISSCC), 2022, pp. 484-485.

8.Shoubhik Kamarkar, Marco Berkhout, Kofi A.A. Makinwa and Qinwen Fan, “A -91 dB THD+N, Resistor-Less Class-D Piezoelectric Speaker Driver using a Dual Voltage/ Current Feedback for LC Resonance Damping,” IEEE International Solid-State Circuits Conference (ISSCC), 2021, pp. 488-489.

9.Huajun Zhang, Nuriel Rosza, Marco Berkhout, and Qinwen Fan, “A −109.1 dB/−98 dB THD/THD+N chopper class-D amplifier with >83.7 dB PSRR over the entire audio band,” IEEE European Solid-State Circuits Conference (ESSCIRC), 2021, pp. 395-398, doi: 10.1109/ESSCIRC53450.2021.9567786. (Best Student Paper Award 2022)

10.Huajun Zhang, Marco Berkhout, Kofi Makinwa and Qinwen Fan, "A −121.5 dB THD Class-D Audio Amplifier with 49 dB Suppression of LC Filter Nonlinearity and Robust to +/−30% LC Filter Spread," 2021 Symposium on VLSI Circuits, 2021, pp. 1-2, doi: 10.23919/VLSICircuits52068.2021.9492441.

11.Amirhossein Jouyaeian, Qinwen Fan, Mario Motz, Udo Ausserlechner, Kofi A. A. Makinwa, “A 25A Hybrid Magnetic Current Sensor with 64mA Resolution, 1.8MHz Bandwidth, and a Gain Drift Compensation Scheme,” 2021 IEEE International Solid-State Circuits Conference (ISSCC), 2021, pp. 82-84, doi: 10.1109/ISSCC42613.2021.9365767.

12.Huajun Zhang, Shoubhik Karmakar, Lucien Breems, Quino Sandifort, Marco Berkhout, Kofi Makinwa, Qinwen Fan, “A− 107.8 dB THD+ N Low-EMI Multi-Level Class-D Audio Amplifier,” 2020 IEEE Symposium on VLSI Circuits, 2020, pp. 1-2, doi: 10.1109/VLSICircuits18222.2020.9162793.

13.Shoubhik Karmakar, Huajun Zhang, Robert Van Veldhoven, Lucien Breems, Marco Berkhout, Qinwen Fan, Kofi AA Makinwa, “A 28W -108.9dB/-102.2dB THD/THD+N Hybrid ∆Σ-PWM Class-D Audio Amplifier with 91% Peak Efficiency and Reduced EMI Emission,” 2020 IEEE International Solid-State Circuits Conference (ISSCC), 2020, pp. 350-352, doi: 10.1109/ISSCC19947.2020.9063001.

14.Arthur C. de Oliveira, Thomas V. P. Schut, Jarno Groenesteijn, Qinwen Fan, Remco J. Wiegerink and Kofi A. A. Makinwa, "A MEMS Coriolis Mass Flow Sensing System with Combined Drive and Sense Interface," 2019 IEEE SENSORS, 2019, pp. 1-4, doi: 10.1109/SENSORS43011.2019.8956695.

15.Qinwen Fan and Kofi A.A. Makinwa, "Capacitively-coupled Chopper Instrumentation Amplifiers: An Overview," 2018 IEEE SENSORS, 2018, pp. 1-4, doi: 10.1109/ICSENS.2018.8589958. (Invited paper)

16.Long Xu, Burak Gönen, Qinwen Fan, Johan H. Huijsing and Kofi A. A. Makinwa, "A 110dB SNR ADC with ±30V input common-mode range and 8μV Offset for current sensing applications," 2015 IEEE International Solid-State Circuits Conference - (ISSCC) Digest of Technical Papers, 2015, pp. 1-3, doi: 10.1109/ISSCC.2015.7062940.

17.Qinwen Fan, Johan H. Huijsing, Kofi A.A. Makinwa, “A Multi-path Chopper-stabilized Capacitively Coupled operational Amplifier with 20V-input-common-mode Range and 3µV Offset”, 2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2013, pp. 176-177, doi: 10.1109/ISSCC.2013.6487688.

18.Qinwen Fan, Johan H. Huijsing, Kofi A.A. Makinwa, “A Capacitively-coupled Chopper operational Amplifier with 3µV Offset and outside-the-rail Capability”, 2012 Proceedings of European Solid-State Circuits Conference (ESSCIRC), 2012, pp. 73-76, doi: 10.1109/ESSCIRC.2012.6341259.

19.Qinwen Fan, Johan H. Huijsing, Kofi A.A. Makinwa, “A Capacitively-Coupled Chopper Instrumentation Amplifier with a ±30V Common-Mode Range, 160dB CMRR and 5µV Offset”, 2012 IEEE International Solid-State Circuits Conference (ISSCC), 2012, pp. 374-376, doi: 10.1109/ISSCC.2012.6177045.

20.Jiawei Xu, Qinwen Fan, Johan H. Huijsing, Chris Van Hoof, R. F. Yazicioglu and Kofi A. A. Makinwa, "Measurement and analysis of input current noise in chopper amplifiers," 2012 Proceedings of European Solid-State Circuits Conference (ESSCIRC), 2012, pp. 81-84, doi: 10.1109/ESSCIRC.2012.6341261.

21.Qinwen Fan, Fabio Sebastiano, Johan H. Huijsing, Kofi A.A. Makinwa, “A 1.8µW 1µV-Offset Capacitively-Coupled Chopper Instrumentation Amplifier in 65nm CMOS”, 2010 Proceedings of European Solid-State Circuits Conference (ESSCIRC), 2010, pp. 170-173, doi: 10.1109/ESSCIRC.2010.5619902.

22.Qinwen Fan, Johan H. Huijsing, Kofi A.A. Makinwa, “A 21nV/√Hz Chopper-Stabilized Multi-path Current-Feedback Instrumentation Amplifier with 2µV Offset”, 2010 IEEE International Solid-State Circuits Conference - (ISSCC), 2010, pp. 80-81, doi: 10.1109/ISSCC.2010.5434041.

23.Qinwen Fan, F. Sebastiano, H. Huijsing and K. Makinwa, "A 2.1 μW area-efficient capacitively-coupled chopper instrumentation amplifier for ECG applications in 65 nm CMOS," 2010 IEEE Asian Solid-State Circuits Conference (ASSCC), 2010, pp. 1-4, doi: 10.1109/ASSCC.2010.5716624.

Books and book chapters

1.Qinwen Fan, Johan H Huisjing, Kofi A.A. Makinwa, “Capacitively-coupled chopper amplifiers”, Springer, 2017.

2.Qinwen Fan, Kofi A.A. Makinwa, Johan H Huisjing, “Advances in low-offset opamps”, invited book chapter in Efficient sensor interfaces, advanced amplifiers and low power RF systems, p 187-199, 2016.

3.Huajun Zhang, Marco Berkhout, Kofi Makinwa, Qinwen Fan, “Capacitively-Coupled Class-D Audio Amplifiers”, invited book chapter in Efficient sensor interfaces, advanced amplifiers and low power RF systems, to be published 2024

Patents

Johan H. Huijsing, Qinwen Fan, Kofi A. A. Makinwa, D. Fu, J. Wu, L. Zhou, “Fast-settling capacitive-coupled amplifiers”, U.S. Patent 9,294,049. (Valorized, MAX40204,MAX44284,MAX44285)

Johan H. Huijsing, Qinwen Fan, Kofi A. A. Makinwa, “Fully capacitive coupled input choppers”, U.S. Patent 9,143,092. (Valorized, MAX40204,MAX44284,MAX44285)

Matthew Al Disi, Qinwen Fan, Stoyan Nihtianov, “Readout circuit for pixelized electron detector” European patent application: EP 3 961 268 A1

Amirhossein Jouyaeian, Qinwen Fan, Kofi Makinwa, Mario Motz “Apparatuses and methods for electrical current sensing” (U.S. patent 2020P04956U)

Jieyu Liao, Qinwen Fan, “A maximum power level estimation circuit for a photovoltaic system”, NL Patent, Pending.