Wide range digital phase/frequency detector

Details Wide range digital phase/frequency detector Wide range digital phase/frequency detector

1989-05-15

1989-11-28

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328110, 328162, 307511, H03K 906, H03D 1300

Patent

active

048840351

ABSTRACT:
A digital phase/frequency detector circuit in a phase locked loop comprises a logic gate interconnected with a pair of bistable devices clocked respectively by input and reference digital signals to generate a square wave having a duty ratio corresponding to the phase/frequency difference between the two signals. The duty ratio of the square wave sweeps repetitively between minimum and maximum values as the phase/frequency difference changes monotonically. The square wave is integrated to obtain a repetitive sawtooth. To increase the range, circuitry is provided to provide a constant level signal when the peak of a sawtooth is approached and to reset the bistable devices to provide a multiple of the earlier range.

REFERENCES:
patent: 4264866 (1981-04-01), Benes
patent: 4267514 (1979-01-01), Kimsey
patent: 4277754 (1979-10-01), Minakuchi
patent: 4333055 (1979-11-01), Crackel
patent: 4599570 (1982-07-01), Cloke

Affiliated with

Also associated with

Rating

Wide range digital phase/frequency detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wide range digital phase/frequency detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide range digital phase/frequency detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-584698