Displacement converting circuit arrangement

Details Displacement converting circuit arrangement Displacement converting circuit arrangement

1981-03-31

1983-06-21

Robinson, Thomas A.

Communications: electrical

Continuously variable indicating

With particular transmitter

7386252, 324 60R, G08C 1910, G06G 720

Patent

active

043896464

ABSTRACT:
A displacement converting circuit arrangement comprising first and second capacitors in the form of a paired structure, at least one of the capacitors having a capacitance which is varied in response to a mechanical displacement. Means are provided for deriving first and second currents respectively proportional to the capacitances of the first and second capacitors, means for maintaining at least one of the DC currents corresponding to at least one capacitor having a variable capacitance at a fixed amount, and means for producing an output current corresponding to the difference between the DC currents, so that the output current indicates the amount of the mechanical displacement. Operation stability is improved by the simplified circuit arrangement, with consequent reduction in error and circuit failure. The movable electrode for varying the capacitance can withstand a heavy load.

REFERENCES:
patent: 3646538 (1972-02-01), Frick
patent: 4250490 (1981-02-01), Dahlke

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