Transducer for converting a varying analog current signal to a b

Details Transducer for converting a varying analog current signal to a b Transducer for converting a varying analog current signal to a b

1977-10-11

1979-05-08

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 61R, 73 37, 361283, G01R 2726

Patent

active

041538730

ABSTRACT:
A digital output capacitive transducer wherein two capacitors are used, one providing a reference current and the other providing a varying signal current. The signal current is obtained from an oscillator through a capacitor, which varies in capacitance as a function of the parameter to be measured. The reference current offsets the signal current to attain a known relationship between the sampled parameter and the signal current. The circuit has a small number of components and operates on a relatively low voltage with an accurate digital output.

REFERENCES:
patent: 2371395 (1945-03-01), Keeling, Jr.
patent: 3325727 (1967-06-01), Haas
patent: 3497801 (1970-02-01), Clower et al.
patent: 4001813 (1977-01-01), Kosakowski

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