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:
Aug. 06, 1991
Filed:
Jun. 11, 1990
Bruno P Motte, Nijmegen, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A synchronizing circuit including an oscillator, a phase discriminator having a first input coupled to an input terminal of the circuit for receiving an incoming synchronizing signal, a second input for receiving a signal derived from the oscillator and an output for applying a control signal to a control input of the oscillator for controlling the frequency and/or the phase of the oscillator signal. To ensure that the action of the circuit is not disturbed when no signal is present at the input terminal of the circuit, the circuit includes an auxiliary circuit for reducing the difference between the signal at the output of the phase discriminator and a reference, the auxiliary circuit being active in response to a synchronizing signal detector at the output of the phase discriminator in the absence of the incoming synchronizing signal and inactive in the opposite case.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile