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:
Jun. 17, 2008
Filed:
Dec. 02, 2004
Applicants:
Gary Giust, Santa Clara, CA (US);
Chwei-po Chew, Cupertino, CA (US);
Sung-ki Min, Cupertino, CA (US);
Inventors:
Gary Giust, Santa Clara, CA (US);
Chwei-Po Chew, Cupertino, CA (US);
Sung-Ki Min, Cupertino, CA (US);
Assignee:
Cypress Semiconductor Corp., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L /97 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lock-aid circuit and method is applied to a phase lock loop (PLL) having a voltage controlled oscillator (VCO), wherein the lock aid is coupled with the input of the VCO. In one example, the lock aid includes a Schmitt trigger having an output, a switch having an output and an input coupled to the output of the Schmitt trigger, and a voltage controlled current source coupled with the output of the switch.