학술논문
증폭기 공유 기법을 이용한 저전력 저잡음 용량형 센서용 신호 처리 IC
Low Noise and Low Power IC Using Opamp Sharing Technique for Capacitive Micro-Sensor Sensing Platform
Low Noise and Low Power IC Using Opamp Sharing Technique for Capacitive Micro-Sensor Sensing Platform
Document Type
Article
Author
박윤종 / Yunjong Park; 김철영 / Choul-young Kim; 정방철 / Bang Chul Jung; 유호영 / Hoyoung Yoo; 고형호 / Hyoungho Ko
Source
센서학회지 / JOURNAL OF SENSOR SCIENCE AND TECHNOLOGY. Jan 31, 2017 26(1):60
Subject
Language
Korean
ISSN
1225-5475
Abstract
This paper describes the low noise and low power IC using the opamp sharing technique for the capacitive micro-sensor sensing platform. The proposed IC reduces noise using correlated double sampling (CDS) and reduces power consumption using the opamp sharing technique. The IC is designed to be fully programmable, and can be digitally controlled by serial peripheral interface (SPI). The power consumption and the integrated input referred noise are 1.02 mW from a 3.3 V supply voltage and 0.164 aFRMS with a bandwidth of 400Hz. The capacitive sensitivity, the input-output linearity and the figure of merits (FoM) are 2.5 mV/fF, 2.46 %FSO, and 8.4, respectively.