A 1.8µW 1µV-offset capacitively-coupled chopper instrumentation amplifier in 65nm CMOS. - Qinwen Fan; Fabio Sebastiano; Johan H. Huijsing; Kofi A. A. Makinwa (ESSCIRC, 2010)

A 21nV/√Hz chopper-stabilized multipath current-feedback instrumentation amplifier with 2µV offset. - Qinwen Fan; Johan H. Huijsing; Kofi A. A. Makinwa (ISSCC, 2010)

A 1.8 μ W 60 nV √ Hz Capacitively-Coupled Chopper Instrumentation Amplifier in 65 nm CMOS for Wireless Sensor Nodes. - Qinwen Fan; Fabio Sebastiano; Johan H. Huijsing; Kofi A. A. Makinwa (IEEE J. Solid State Circuits, 2011)

A capacitively-coupled chopper operational amplifier with 3μV Offset and outside-the-rail capability. - Qinwen Fan; Johan H. Huijsing; Kofi A. A. Makinwa (ESSCIRC, 2012)

Measurement and analysis of input current noise in chopper amplifiers. - Jiawei Xu 001; Qinwen Fan; Johan H. Huijsing; Chris Van Hoof; Refet Firat Yazicioglu; Kofi A. A. Makinwa (ESSCIRC, 2012)

A capacitively coupled chopper instrumentation amplifier with a ±30V common-mode range, 160dB CMRR and 5μV offset. - Qinwen Fan; Johan H. Huijsing; Kofi A. A. Makinwa (ISSCC, 2012)

A 21 nV/√ Hz Chopper-Stabilized Multi-Path Current-Feedback Instrumentation Amplifier With 2 µ V Offset. - Qinwen Fan; Johan H. Huijsing; Kofi A. A. Makinwa (IEEE J. Solid State Circuits, 2012)

A multi-path chopper-stabilized capacitively coupled operational amplifier with 20V-input-common-mode range and 3µV offset. - Qinwen Fan; Johan H. Huijsing; Kofi A. A. Makinwa (ISSCC, 2013)

Measurement and Analysis of Current Noise in Chopper Amplifiers. - Jiawei Xu 001; Qinwen Fan; Johan H. Huijsing; Chris Van Hoof; Refet Firat Yazicioglu; Kofi A. A. Makinwa (IEEE J. Solid State Circuits, 2013)

5.2 A 110dB SNR ADC with ±30V input common-mode range and 8μV Offset for current sensing applications. - Long Xu 004; Burak Gonen; Qinwen Fan; Johan H. Huijsing; Kofi A. A. Makinwa (ISSCC, 2015)

Capacitively-coupled Chopper Instrumentation Amplifiers: An Overview. - Qinwen Fan; Kofi A. A. Makinwa (IEEE SENSORS, 2018)

23.4 A 28W -108.9dB/-102.2dB THD/THD+N Hybrid ΔΣ-PWM Class-D Audio Amplifier with 91% Peak Efficiency and Reduced EMI Emission. - Shoubhik Karmakar; Huajun Zhang 001; Robert H. M. van Veldhoven; Lucien J. Breems; Marco Berkhout; Qinwen Fan; Kofi A. A. Makinwa (ISSCC, 2020)

A -107.8 dB THD+N Low-EMI Multi-Level Class-D Audio Amplifier. - Huajun Zhang 001; Shoubhik Karmakar; Lucien J. Breems; Quino Sandifort; Marco Berkhout; Kofi A. A. Makinwa; Qinwen Fan (VLSI Circuits, 2020)

A 28-W, -102.2-dB THD+N Class-D Amplifier Using a Hybrid ΔΣM-PWM Scheme. - Shoubhik Karmakar; Huajun Zhang 001; Robert H. M. van Veldhoven; Lucien J. Breems; Marco Berkhout; Qinwen Fan; Kofi A. A. Makinwa (IEEE J. Solid State Circuits, 2020)

A -109.1 dB/-98 dB THD/THD+N Chopper Class-D Amplifier with >83.7 dB PSRR Over the Entire Audio Band. - Huajun Zhang 001; Nuriel Rozsa; Marco Berkhout; Qinwen Fan (ESSCIRC, 2021)

A 25A Hybrid Magnetic Current Sensor with 64mA Resolution, 1.8MHz Bandwidth, and a Gain Drift Compensation Scheme. - Amirhossein Jouyaeian; Qinwen Fan; Mario Motz; Udo Ausserlechner; Kofi A. A. Makinwa (ISSCC, 2021)

A -121.5 dB THD Class-D Audio Amplifier with 49 dB Suppression of LC Filter Nonlinearity and Robust to +/-30% LC Filter Spread. - Huajun Zhang 001; Marco Berkhout; Kofi A. A. Makinwa; Qinwen Fan (VLSI Circuits, 2021)

A High-Linearity and Low-EMI Multilevel Class-D Amplifier. - Huajun Zhang 001; Shoubhik Karmakar; Lucien J. Breems; Quino Sandifort; Marco Berkhout; Kofi A. A. Makinwa; Qinwen Fan (IEEE J. Solid State Circuits, 2021)

A -91 dB THD+N Resistor-Less Class-D Piezoelectric Speaker Driver Using a Dual Voltage/ Current Feedback for LC Resonance Damping. - Shoubhik Karmakar; Marco Berkhout; Kofi A. A. Makinwa; Qinwen Fan (ISSCC, 2022)

A 121.4dB DR, -109.8dB THD+N Capacitively-Coupled Chopper Class-D Audio Amplifier. - Huajun Zhang 001; Marco Berkhout; Kofi A. A. Makinwa; Qinwen Fan (ISSCC, 2022)

A -91 dB THD+N, Class-D Piezoelectric Speaker Driver Using Dual Voltage/Current Feedback for Resistor-Less LC Resonance Damping. - Shoubhik Karmakar; Marco Berkhout; Kofi A. A. Makinwa; Qinwen Fan (IEEE J. Solid State Circuits, 2022)

A -121.5-dB THD Class-D Audio Amplifier With 49-dB LC Filter Nonlinearity Suppression. - Huajun Zhang 001; Marco Berkhout; Kofi A. A. Makinwa; Qinwen Fan (IEEE J. Solid State Circuits, 2022)

A 121.4-dB DR Capacitively Coupled Chopper Class-D Audio Amplifier. - Huajun Zhang 001; Marco Berkhout; Kofi A. A. Makinwa; Qinwen Fan (IEEE J. Solid State Circuits, 2022)

A Chopper Class-D Amplifier for PSRR Improvement Over the Entire Audio Band. - Huajun Zhang 001; Nuriel N. M. Rozsa; Marco Berkhout; Qinwen Fan (IEEE J. Solid State Circuits, 2022)

A 51A Hybrid Magnetic Current Sensor with a Dual Differential DC Servo Loop and 43mArms Resolution in a 5MHz Bandwidth. - Amirhossein Jouvaeian; Qinwen Fan; Mario Motz; Udo Ausserlechner; Kofi A. A. Makinwa (ISSCC, 2023)

A 120.9dB DR, -111.2dB THD+N Digital-Input Capacitively-Coupled Chopper Class-D Audio Amplifier. - Huajun Zhang 001; Marco Berkhout; Kofi A. A. Makinwa; Qinwen Fan (ISSCC, 2023)

A Class-D Piezoelectric Speaker Driver Using A Quadrature Feedback Chopping Scheme achieving 29dB Large-Signal THD+N Improvement. - Shoubhik Karmakar; Huajun Zhang 001; Marco Berkhout; Qinwen Fan (VLSI Technology and Circuits, 2023)

A Hybrid Magnetic Current Sensor With a Multiplexed Ripple-Reduction Loop. - Amirhossein Jouyaeian; Qinwen Fan; Roger Luis Brito Zamparette; Udo Ausserlechner; Mario Motz; Kofi A. A. Makinwa (IEEE J. Solid State Circuits, 2023)

A Hybrid Magnetic Current Sensor With a Dual Differential DC Servo Loop. - Amirhossein Jouyaeian; Qinwen Fan; Udo Ausserlechner; Mario Motz; Kofi A. A. Makinwa (IEEE J. Solid State Circuits, 2023)

A 120.9-dB DR Digital-Input Capacitively Coupled Chopper Class-D Audio Amplifier. - Huajun Zhang 001; Marco Berkhout; Kofi A. A. Makinwa; Qinwen Fan (IEEE J. Solid State Circuits, 2023)

21.3 A -106.3dB THD+N Feedback-After-LC Class-D Audio Amplifier Employing Current Feedback to Enable 530kHz LC-Filter Cut-Off Frequency. - Huajun Zhang 001; Haochun Fan; Miao Zhang; Marco Berkhout; Qinwen Fan (ISSCC, 2024)

21.1 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. - Huajun Zhang 001; Mingshuang Zhang; Mengying Chen; Arthur Admiraal; Miao Zhang; Marco Berkhout; Qinwen Fan (ISSCC, 2024)

A 121.7-dB DR and -109.0-dB THD+N Filterless Digital-Input Class-D Amplifier With an HV IDAC Using Tri-Level Unit Cells. - Huajun Zhang 001; Mingshuang Zhang; Mengying Chen; Arthur Admiraal; Miao Zhang; Marco Berkhout; Qinwen Fan (IEEE J. Solid State Circuits, 2024)

A Fully-Dynamic Capacitive Touch Sensor with Tri-Level Energy Recycling and Compressive Sensing Technique Achieving 1513 Hz Framerate and 10.66 pJ/Step Energy Efficiency. - Xiangdong Feng; Zhiyu Wang; Haoyang Li; Jiaqing Li; Guanglong Wu; Wei Wang; Weijin Lin; Xin Hu; Weixiao Wang; Zhong Tang; Yuyan Liu; Qinwen Fan; et al. (CICC, 2025)

3.4: A CMOS Operational Amplifier Achieving ±5.8µV 3σ Offset and ±88nV/°C 3σ Offset Drift Using an on-Chip Heater-Based Self-Trimming Technique. - Aodong Zhang; Mingtao Zhan; Mengying Chen; Yi Zhong; Lu Jie 001; Nan Sun 001; Qinwen Fan (ISSCC, 2025)