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:
Jan. 11, 2011
Filed:
Apr. 16, 2010
Young-hoon OH, Kyoungki-do, KR;
Young-Hoon Oh, Kyoungki-do, KR;
Hynix Semiconductor Inc., , KR;
Abstract
A delay locked loop (DLL) of a semiconductor device has a relatively small area and low current consumption while having a function of correcting a duty ratio. The semiconductor device includes a split unit configured to receive and split a reference clock to output a first clock corresponding to a first edge of the reference clock and a second clock corresponding to a second edge, a voltage generation unit configured to generate a first voltage corresponding to a duty ratio of the first clock and a second voltage corresponding to a duty ratio of the second clock, a voltage comparison unit configured to compare levels of the first and second voltages with each other, and a clock delay unit configured to receive one of the first and second clocks to delay the received clock of which delay amount is determined in response to an output signal of the voltage comparison unit.