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과도 응답 해석을 이용한 광센서 TIA 피드백 커패시턴스의 정밀도 향상 방법

Enhancing Precision of Feedback Capacitance in Optical Sensor TIAs using Transient Response Analysis

  • 기동한 ;
  • 최은석 ;
  • 이민웅 ;
  • 이남호 ;
  • 조성익
  • Dong-Han Ki (Dept. of Electronics Engineering, Jeonbuk National University) ;
  • Eun-Seok Choi (Dept. of Electronics Engineering, Jeonbuk National University) ;
  • Min-Woong Lee (Korea Atomic Energy Research Institute) ;
  • Nam-Ho Lee (Korea Atomic Energy Research Institute) ;
  • Seong-Ik Cho (Dept. of Electronics Engineering, Jeonbuk National University)
  • 투고 : 2024.08.07
  • 심사 : 2024.09.01
  • 발행 : 2024.09.30

초록

광센서에 사용되는 TIA(트랜스임피던스 증폭기)는 포토다이오드의 기생 커패시터로 인해 안정성 문제, 대역폭 제한 등의 문제가 발생할 수 있다. 이 문제는 일반적으로 피드백 커패시터를 통하여 해결되며, 피드백 커패시턴스의 선택은 안정성에 결정적인 영향을 미친다. 기존에는 피드백 시스템 해석을 통하여 커패시턴스의 값을 결정하였는데, 이는 정확한 값을 결정하기 힘든 단점이 존재한다. 본 논문에서는 과도 응답 해석을 통한 정확한 피드백 커패시턴스 값의 결정 방법을 제시하며, 시뮬레이션을 통해 비교 검증하였다.

Transimpedance Amplifiers (TIAs) used in optical sensors can experience stability issues and bandwidth limitations due to the parasitic capacitance of photodiodes. These issues are typically resolved by incorporating a feedback capacitor, and the selection of this capacitor is crucial for stability. Traditionally, the value of the feedback capacitance has been determined through feedback system analysis, which has limitations in accurately determining the optimal value. This paper proposes a method for accurately determining the feedback capacitance value through transient response analysis and validates this approach through simulation comparisons.

키워드

과제정보

This work was supported by the KAERI institutional R&D program (Project No. 523420-23).

참고문헌

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