04023116 is referenced by 24 patents and cites 3 patents.

A phase-locked loop frequency synthesizer is described not having the uncontrolled modulation of its output normally associated with such a synthesizer due to a detection dead band inherent in the phase/frequency comparator which is a principal part thereof. The frequency synthesizer includes, as is conventional, a reference oscillator and an oscillator for generating the synthesizer output. The comparator is also included as is conventional to detect unwanted deviations of the phase and frequency of the synthesizer output so they can be corrected. In order to compensate for the inability of the comparator to detect small unwanted deviations, a pulse generator is added to the synthesizer to apply what is, in effect, an intentional periodic phase error signal greater than the dead band difference. This causes the phase of the desired output to be corrected in a controlled manner which will prevent undesired frequency modulation of its output.

Title
Phase-locked loop frequency synthesizer
Application Number
5/703394
Publication Number
4023116
Application Date
July 8, 1976
Publication Date
May 10, 1977
Inventor
Eric G Breeze
Los Altos
CA, US
Charles H Alford
Santa Clara
CA, US
Peter H Alfke
Los Altos Hills
CA, US
Agent
Norman E Reitz
Henry K Woodward
Alan H MacPherson
Assignee
Fairchild Camera and Instrument Corporation
CA, US
IPC
H03B 3/04
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