Frequency discriminator

Details Frequency discriminator Frequency discriminator

1981-08-25

1984-01-17

Zazworsky, John

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

307519, 328141, 329110, 329140, H03D 306

Patent

active

044266227

ABSTRACT:
A new type of frequency discriminator in which the signal is applied to a ir of channels, one of which includes a frequency pass circuit which may comprise a parallel resonant circuit, and the other a frequency stop circuit which may comprise a resonant trap. The channels also include means to differentially shift the phases of the signals therein by 90.degree.. The two channel outputs are applied to an analog multiplier and the dc value of the output thereof is the discriminator output.

REFERENCES:
patent: 2844720 (1958-07-01), Gilbert
patent: 3546609 (1970-12-01), Boyajian
patent: 4359694 (1982-11-01), Suenaga
patent: 4375618 (1983-03-01), Jett, Jr.

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