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:
Feb. 03, 1987
Filed:
Feb. 04, 1985
William C Hughes, Scotia, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Method and apparatus are disclosed for providing a local oscillator signal which is in phase and frequency synchronism with a carrier signal wherein the frequency of the carrier is a constant multiple of the frequency of a reference waveform. A phase detector detects the phase of the local oscillator relative to the carrier and provides a signal to a microprocessor indicative of this phase. The microprocessor provides the local oscillator and responds to a reference waveform threshold detector to determine the number of local oscillator pulses provided during one cycle of the reference and to maintain this number to equal the constant multiple. The microprocessor further responds to the phase detector to adjust the phase of the local oscillator and thereby maintain phase synchronism with the carrier.