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:
Oct. 06, 2009
Filed:
Dec. 12, 2006
Applicants:
Nitin Agarwal, Noida, IN;
Kallol Chatterjee, Noida, IN;
Inventors:
Nitin Agarwal, Noida, IN;
Kallol Chatterjee, Noida, IN;
Assignee:
STMicroelectronics Pvt. Ltd., Greater Noida, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A phase locked loop (PLL) circuit includes circuitry for preventing an erroneous condition in charge pump operation. The PLL circuit is modified by adding delay elements for connection between the phase frequency detector and the charge pump. A digital logic circuit is also included to provide the clock signals for the loop filter wherein the clock signals have rising edges corresponding to an earlier occurring rising edge of either of the output signals from the phase-frequency detector.