A Photodiode Sensor Readout Circuit Utilizing a Differential Current Mirror for Dark Current Cancellation

  • Haejun Noh Chungbuk National University
  • Woojin Kim Chungbuk National University
  • HYUNTAK JEON Chungbuk National University
DOI: https://doi.org/10.23075/jicas.2024.10.4.007
Keywords: Photodiode sensor interface ICs, Dark current cancellation, Current mirrors

Abstract

This paper proposes a differential current mirror circuit with built-in dark current cancellation for photodiode applications. The photodiode sensor, modeled with a diode and a parasitic capacitor, generates a current signal that is directed through two current mirrors. The signals from each current mirror are then differentially outputted. Thanks to the proposed differential current mirrors, the only high frequency signal current can be transferred to output port effectively. The proposed sensor interface ICs were implemented using the PDK of the DB Hitek process and achieved a dark current cancellation ratio of 40 dB at reconfigurable frequency.

Author Biographies

Haejun Noh, Chungbuk National University

Haejun Noh received the B.S. degrees in electronics engineering from Chungbuk National University, Cheongju, Korea, in 2024.

He is working as a master student in Chungbuk National University and his research interests include power management and sensor interface ICs.

Woojin Kim, Chungbuk National University

Woojin Kim received the B.S. degrees in electronics engineering from Chungbuk National University, Cheongju, Korea, in 2024.

He is working as a master student in Chungbuk National University and his research interests include power management and sensor interface ICs.

HYUNTAK JEON, Chungbuk National University

Hyuntak Jeon received the B.S. degree in electronic and electrical engineering from Hongik University, Seoul, South Korea, in 2015, and the M.S. and Ph.D. degrees in electrical engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea, in 2017 and 2021, respectively.

He was a Senior Researcher with the Agency for Defense Development (ADD), Daejeon, from 2021 to 2022. In 2022, he joined the School of Semiconductor Engineering, Chungbuk National University, Cheongju, South Korea, where he is currently an Assistant Professor. His research interests include mixed-signal and power management IC design.

Homepage : https://sites.google.com/view/amp-lab/

Published
2024-10-01
How to Cite
Noh, H., Kim, W., & JEON, H. (2024). A Photodiode Sensor Readout Circuit Utilizing a Differential Current Mirror for Dark Current Cancellation. Journal of Integrated Circuits and Systems, 10(4). https://doi.org/10.23075/jicas.2024.10.4.007
Issue
Vol 10 No 4 (2024)
Section
Articles