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:
Apr. 29, 2014
Filed:
Sep. 28, 2012
Applicant:
Xilinx, Inc., San Jose, CA (US);
Inventors:
Wayne Fang, Pleasanton, CA (US);
Parag Upadhyaya, Los Gatos, CA (US);
Assignee:
Xilinx, Inc., San Jose, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus comprises a lock-loop circuit including an oscillator, a frequency detector, a charge pump, and a regulator. The regulator is coupled to provide a regulated signal to the oscillator to control frequency. The oscillator and the frequency detector are coupled to receive a reference clock signal. The reference clock signal is coupled to the oscillator to suppress noise in the oscillator by pulse injection. The frequency detector is coupled to receive an oscillator output from the oscillator.