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. 28, 2012
Filed:
Aug. 02, 2010
Guosheng Wu, Chengdu, CN;
Yong Quan, Chengdu, CN;
Guosheng Wu, Chengdu, CN;
Yong Quan, Chengdu, CN;
IPGoal Microelectronics (SiChuan) Co., Ltd., High-Tech Incubation Park, Chengdu, Sichuan Province, CN;
Abstract
A duty cycle correction method includes detecting independently a relative delay time of two input differential signals; equating the sum of two relative delay time with the cycle of the input differential signals; and adjusting the two delay time to the same value. A corresponding implementation circuit includes two time delay units; two relative phase detectors connecting simultaneously with each of the two time delay units; a charge pump connecting with the output of each of the two relative phase detectors, with its output connecting to the two time delay units in order to form a loop; and a synthesis output unit connecting with both the time delay units, thereby generating output signals. The adjusting range of duty cycle becomes much wider. The implementation circuit is absolutely symmetrical, so a duty cycle with high accuracy can be obtain.