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. 16, 2007
Filed:
Jun. 29, 2006
Hyun Woo Lee, Kyoungki-do, KR;
Hyun Woo Lee, Kyoungki-do, KR;
Hynix Semiconducter Inc., Kyoungki-do, KR;
Abstract
Enclosed is a duty cycle correction device for correcting a duty cycle of a clock signal output from a delay locked loop (DLL) device by using a phase mixer. The duty cycle correction device comprises: a mixer for receiving a first clock signal and a second clock signal and outputting a first signal; a phase splitter for receiving the first signal and outputting a third clock signal by delaying the first signal and a fourth clock signal by delaying and inverting the first signal; a duty detection unit for receiving the third and fourth clock signals and detecting a difference between their duty cycles; a combination unit for outputting a second signal; and a shift register for outputting a control signal to adjust a mixing ratio of the first and second clock signals in response to the second signal.