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:
Mar. 22, 2011
Filed:
Jun. 28, 2007
Applicant:
Kwang-jin NA, Gyeonggi-do, KR;
Inventor:
Kwang-Jin Na, Gyeonggi-do, KR;
Assignee:
Hynix Semiconductor Inc., Gyeonggi-do, KR;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 7/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A DLL circuit includes a clock selection control unit configured to generate a clock selection signal on the basis of a phase difference between a reference clock and a feedback clock and, after the clock selection signal is generated, to generate an initialization signal. A delay control unit, when the initialization signal is enabled, transfers an initial voltage to be generated by dividing an external power supply voltage to a delay unit as a control voltage, and controls a delay operation of a delay reference clock to be selected on the basis of the clock selection signal.