An Interface Circuit for Capacitive Sensors

Tadashi NAGASAWA  Kenzo WATANABE  

Publication
IEICE TRANSACTIONS (1976-1990)   Vol.E70   No.11   pp.1049-1050
Publication Date: 1987/11/25
Online ISSN: 
DOI: 
Print ISSN: 0000-0000
Type of Manuscript: Special Section LETTER (Special Issue: Papers from 1987 National Conference on Semicondutor Devices and Materials IEICE)
Category: Circuits and Systems
Keyword: 


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Summary: 
An active circuit for detecting a small capacitance change accurately with a minimum number of components is presented for interfacing a capacitive sensor with a digital system. No component trimming is required and the sensitivity to circuit constants is minimum. Thus, it meets all the requirements for the on-chip interface.