A Switched-Capacitor Capacitance Measurement Circuit with the Vernier Scale

Kazuyuki KONDO  Kenzo WATANABE  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E76-A   No.7   pp.1139-1142
Publication Date: 1993/07/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section of Letters Selected from the 1993 IEICE Spring Conference)
Category: 
Keyword: 
switched-capacitor circuits,  capacitance measurement,  A-D conversion,  interpolation,  

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Summary: 
To improve measurement accuracy and speed, a switched-capacitor capacitance measurement circuit with the vernier scale is developed. Its process consists of a coarse measurement by charge-balancing A-D conversion and a fine measurement by single-slope A-D conversion. a prototype using discrete components confirms the principles of operation.