Stable wide deviation linear voltage controlled frequency genera

Details Stable wide deviation linear voltage controlled frequency genera Stable wide deviation linear voltage controlled frequency genera

1975-09-29

1977-05-10

Kominski, John

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

328155, 331 16, H03B 304

Patent

active

040231143

ABSTRACT:
A stable, wide-deviation linear voltage controlled frequency generator including a conventional voltage controlled oscillator (VCO) in a control loop which linearizes the output frequency of the VCO. The control loop includes a crystal oscillator and a digital frequency discriminator. The digital frequency discriminator compares the frequency of the VCO output signal with a stable fixed frequency signal from the crystal oscillator to generate a feedback control signal for the VCO. A novel digital frequency discriminator comprising a digital one shot and a low pass filter is disclosed.

REFERENCES:
patent: 3753141 (1973-08-01), Van Elk

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