Frequency-to-current conversion circuit

Details Frequency-to-current conversion circuit Frequency-to-current conversion circuit

1978-12-07

1980-09-30

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307270, H03K 108

Patent

active

042257964

ABSTRACT:
A frequency-to-current conversion circuit comprises a charge/discharge circuit for charging or discharging with a first constant current in synchronism with each cycle of an input pulse signal having a varying frequency, a voltage comparison circuit for detecting a predetermined voltage attained by the charge/discharge circuit at the expiration of a predetermined time interval dependent on the value of the first constant current from the beginning of the charge or discharge, and an output circuit for receiving the output signal of the voltage comparison circuit as well as the input pulse signal to generate a second constant current during the predetermined time interval in synchronism with each cycle of the input pulse signal.

REFERENCES:
patent: 3836853 (1974-09-01), Cracraft et al.
patent: 4015145 (1977-03-01), Stewart
patent: 4031414 (1977-06-01), Giles et al.

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