Automatic frequency control circuit

Details Automatic frequency control circuit Automatic frequency control circuit

1981-06-26

1983-05-24

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

331 20, H04N 504

Patent

active

043853200

ABSTRACT:
An automatic frequency control (AFC) circuit is disclosed which comprises an oscillating circuit for generating repetitive pulses, a generator for generating comparison signals having a slope portion in response to the repetitive pulses, and a phase comparison circuit which compares the comparison signals, and synchronous (sync) signals and based on the comparison supplies control signals to the oscillating circuit. The AF circuit further comprises a limiting circuit connected between the comparison signal generator and the phase comparison circuit which limits the maximum and minimum levels of the comparison signals to predetermined levels, and thereby predeterminedly limits the control range of the AFC circuit.

REFERENCES:
patent: 3764744 (1973-10-01), Van Hattum et al.

Affiliated with

Also associated with

Rating

Automatic frequency control circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic frequency control circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic frequency control circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2148183