Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1987-07-06
1989-02-21
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324 60C, G01R 1152, G01R 2726
Patent
active
048068462
ABSTRACT:
A relatively simple circuit for implementing a low-cost, low power, highly accurate capacitance-to-voltage converter by which to measure the unknown capacitance of a capacitor. The circuit is characterized by the ability to eliminate error due to stray capacitance sources. The circuit is implemented by a crystal controlled clock generator which produces multi-phase clock signals to control the operation of a pair of series connected field effect transistors and a buffer amplifier. The field effect transistors are alternately switched on and off to periodically charge and discharge the capacitor under measurement between a source of reference potential and the inverting input terminal of a precision operational amplifier. The output voltage of the operational amplifier tracks the capacitance of the capacitor under measurement, such that an accurate indication of its capacitance is obtained by merely reading the output of the operational amplifier.
REFERENCES:
patent: 4149231 (1979-04-01), Bukosky et al.
patent: 4251767 (1981-02-01), Montana
patent: 4459541 (1984-07-01), Fielden et al.
Eisenzopf Reinhard J.
Fischer Morland C.
Miele Anthony L.
LandOfFree
High accuracy direct reading capacitance-to-voltage converter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High accuracy direct reading capacitance-to-voltage converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High accuracy direct reading capacitance-to-voltage converter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1524794