Signal translating circuit for variable area capacitive pressure

Details Signal translating circuit for variable area capacitive pressure Signal translating circuit for variable area capacitive pressure

1976-12-27

1978-08-01

Miller, Jr., Stanley D.

Oscillators

Relaxation oscillators

331 65, 361290, G01M 2700, H03F 100

Patent

active

041045955

ABSTRACT:
An electrical circuit translates the capacitance change of a variable area capacitive transducer into a d-c voltage change. The transducer has two electrodes, and the surface of one electrode is anodized or otherwise provided with a dielectric layer. One of the two electrodes is nonlinear, having an apex point nearer the other electrode than the remainder of the electrode surface. As a force is applied to the deformable one of the two electrodes, there is a change in the effective contact area between the electrodes in accordance with the applied pressure, producing a resultant change in capacitance. The signal translating circuit produces a d-c output signal which varies as a function of the transducer capacitance change.

REFERENCES:
patent: 1884229 (1932-10-01), Rawls
patent: 3249933 (1966-05-01), Vosteen
patent: 3729991 (1973-05-01), Hardway, Jr.
patent: 3912988 (1975-10-01), Levesque et al.

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