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:
May. 22, 2007
Filed:
Aug. 11, 2005
Ibrahim Yayla, Delmar, CA (US);
Ibrahim Yayla, Delmar, CA (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
A delay-locked loop ('DLL') having reduced susceptibility to false lock. The DLL includes a delay path coupled to delay an input signal. The delay path includes two or more variable delay cells coupled in series and a feedback node coupled to an output of one of the variable delay cells. An inverter is coupled to receive the input signal and to output an inverted signal. A feedback circuit is coupled to receive the inverted signal from the inverter and to receive a feedback signal from the feedback node. The feedback circuit monitors a phase difference between the inverted signal and the feedback signal to generate a delay control signal in response to the phase difference to adjust a variable delay of the delay path.