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. 20, 2002
Filed:
Jan. 11, 1999
David J. Streett, Lewisville, TX (US);
Alcatel USA Sourcing, L.P., Plano, TX (US);
Abstract
An apparatus for adjusting the phase difference of a first clock signal ( ) and a second clock ( ) is disclosed. The apparatus includes a phase indicator ( ) which receives a first clock signal ( ) and a second clock signal ( ) and determines a phase relationship. A microprocessor ( ) outputs a digital value related to the phase relationship. An analog to digital converter ( ) receives the digital value and outputs an analog value based on the digital signal. After that a voltage controlled constant current source ( ) receives the analog value and outputs a constant current source proportional to the analog value. Finally, a phase lock loop circuit ( ) receives the constant current source and adjusts the phase relationship.