Analog to frequency convertor

Details Analog to frequency convertor Analog to frequency convertor

1977-08-15

1978-11-07

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307261, 307271, 307362, 328128, H03K 1302

Patent

active

041248210

ABSTRACT:
An analog to frequency convertor for developing an output signal of frequency proportional to a measuring current or voltage by the charge quantity compensation method, comprising an integrator, a threshold switch downstream thereof, a compensating charge transmitter which supplies a constant compensating charge to a capacitor of the integrator each time the threshold switch responds, and a control circuit to generate a periodic digital polarity signal which controls the polarity of the measuring current or voltage and of the compensating charge transmitter and always changes its logic value at the same level of the output voltage of the integrator.

REFERENCES:
patent: 3256426 (1966-06-01), Roth et al.
patent: 3541320 (1970-11-01), Beall
patent: 3639843 (1972-02-01), Schmidhauser
patent: 3989961 (1976-11-01), Masreliez

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