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. 04, 1997
Filed:
Nov. 30, 1995
Anthony Kevin Brown, Kanata, Ontario, CA;
Other;
Abstract
A microwave multiphase detector for demultiplexing and regenerating data from an incoming data stream includes N data channels and has a data rate R. For recovering data corresponding to a channel M, a detecting unit receives the data stream, detects a sampling phase corresponding to a data transition on channel M and generates a phase width modulated (pwm) pulse, phase modulated with the sampling phase. A digital to analog (D/A) conversion unit converts the pwm pulse to a contributing control voltage and a data regeneration unit provides a recovered data bit for channel (M). The detector is supplied with N variants of a local clock signal with a rate R/N, each variant being phase displaced with .+-.360.degree./N from the adjacent variants. A counterbalancing unit is also provided for each channel, such that if a pwm pulse is indeed generated, the contributing voltage for that pulse is compensated for with a balance pulse of opposed amplitude. In this way, the sampling phase corresponding to the respective M data channel may be adjusted by varying the ratio between the amplitudes of the pwm pulse and the balance pulse.