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. 07, 2002
Filed:
Aug. 17, 2000
Tzi-Hsiung Shu, San Jose, CA (US);
Vanguard International Semiconductor Corporation, Hsin-Chu, TW;
Abstract
A duty cycle correcting circuit is described having a first capacitor connected between a first node and a reference node and a second capacitor connected between a second node and the reference node. When the duty cycle of the output clock signal is greater than 50% the voltage across the second capacitor decreases thereby increasing the charging rate of the first capacitor, decreasing the discharging rate of the first capacitor, and restoring the output duty cycle to 50%. When the duty cycle of the output clock signal is less than 50% the voltage across the second capacitor increases thereby decreasing the charging rate of the first capacitor, increasing the discharging rate of the first capacitor, any restoring output duty cycle to 50%.