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An Interface Circuit for Capacitive Sensors
Tadashi NAGASAWA Kenzo WATANABE
IEICE TRANSACTIONS (1976-1990)
Publication Date: 1987/11/25
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
Full Text: PDF>>
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.