Method of and apparatus for limiting the free running frequency

Details Method of and apparatus for limiting the free running frequency Method of and apparatus for limiting the free running frequency

1993-03-22

1995-02-14

Nelli, Raymond A.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

H03L 700

Patent

active

053898974

ABSTRACT:
A method of and apparatus for limiting the output voltage of a voltage controlled oscillator in a phase-locked loop circuit to a frequency below the maximum input frequency of a divider stage in the phase-locked loop circuit. That frequency is limited by limiting the input voltage of the voltage control oscillator to a voltage less than the maximum allowable input voltage. Thus, the free running frequency of the voltage control oscillator is reduced proportionately to the amount the voltage is limited below its maximum voltage. The voltage is limited by connecting a Zener diode between ground and the output of a low pass filter that provides a voltage to the voltage controlled oscillator.

REFERENCES:
patent: 5124670 (1992-06-01), Lawton
patent: 5124671 (1992-06-01), Srivastava
patent: 5138281 (1992-08-01), Boudewijns
patent: 5184091 (1993-02-01), Srivastava
patent: 5208555 (1993-05-01), Graham et al.
patent: 5257294 (1993-10-01), Pinto et al.
patent: 5294894 (1994-03-01), Gebara

Affiliated with

Also associated with

Rating

Method of and apparatus for limiting the free running frequency does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of and apparatus for limiting the free running frequency , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and apparatus for limiting the free running frequency will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-290233