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:
Nov. 05, 1991
Filed:
Dec. 12, 1989
Glenn A Arbanas, Salt Lake City, UT (US);
Jeffery M Thornock, Layton, UT (US);
Christopher R Keate, Chandler, AZ (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
A novel high-speed bit synchronizer circuit comprises a phase detector having two phase detecting loops, each adapted to generate a partial error voltage signal which is summed together to provide a single phase voltage error signal which is employed to control a VCO in the return branch of both phase detecting loops. Each phase detecting loop comprises a comparator coupled to the input data stream and to a reference voltage to provide two outputs. An electronic switch is coupled to the output of each comparator and each switch has its partial error voltage output coupled through a summing circuit to the VCO, thus completing two phase detecting loops each adapted to generate a partial phase error signal indicative of the phase error between the input data stream and the recovered clock output of the VCO.