The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 1977
Filed:
Jan. 26, 1976
Bruce J Rogers, Collegeville, PA (US);
Sperry Rand Corporation, New York, NY (US);
Abstract
A phase locked oscillator comprising a phase comparator, filter and voltage controlled oscillator coupled in conventional manner to form the forward path of the phase locked loop and a counter and logic circuit coupled to form the feedback path. An input pulse stream is applied to a monostable flip flop which responds to each input pulse to produce a pulse of predetermined length that is applied to one input of the phase comparator. The counter is coupled to receive the oscillator output pulses for counting repetitively to a predetermined count. The logic circuit responds to first and second counts in the predetermined count for respectively generating and terminating a reference pulse in response to each input pulse. The reference pulse is applied to the other input of the phase comparator which in turn provides an output signal indicative of the time displacement between each input pulse and its associated reference pulse to control the oscillator to run at a harmonic frequency of the input pulse stream.