Frequency discriminator

Details Frequency discriminator Frequency discriminator

1992-05-29

1994-01-04

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307529, 328140, H03D 300, H03K 906

Patent

active

052763684

ABSTRACT:
A frequency discriminator is provided which comprises a phase shifter for shifting a phase of an IF signal, a multiplier for analogically multiplying the IF signal and an output signal of the phase shifter and outputting the resultant signal thus obtained as a differential current, a circuit for forming a differential current of a differential output current of the multiplier, an inverter circuit to be driven by the differential current thus formed, and a low-pass filter for integrating an output signal of the inverter circuit. As the circuit for forming the differential current thereof, a current mirror circuit is preferably used. Thus, a quadrature-type frequency discriminator can be realized on a C-MOS integrated circuit.

REFERENCES:
patent: 4119919 (1978-10-01), Sugawara
patent: 4426622 (1984-01-01), Rittenbach
patent: 4451792 (1984-05-01), Gay
patent: 4775843 (1988-10-01), Wilcox

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