Digital frequency discriminator

Details Digital frequency discriminator Digital frequency discriminator

1986-03-06

1987-04-07

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

328134, 329107, 329126, 375 82, H03D 300, H03K 906

Patent

active

046564314

ABSTRACT:
An incoming signal is received and processed through a discriminator function. A reference signal is generated corresponding to the incoming signal. First and second difference signals, corresponding to the frequency difference between the reference signal and the incoming signal are generated, each having a unique phase. A direction signal is generated from the first and second difference signals to indicate if the incoming signal frequency is greater than or less than the reference signal frequency. Pulses are generated which relate to the difference in frequency between the reference signal and the incoming signal, and a recovery circuit is used for recovering modulation from the generated pulses and the direction signal.

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patent: 4325030 (1980-03-01), Colamonico
patent: 4387351 (1980-12-01), Furiga et al.
patent: 4594563 (1986-06-01), Williams

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