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:
Jul. 09, 2013
Filed:
Jul. 28, 2011
Applicant:
Ming-chien Huang, New Taipei, TW;
Inventor:
Ming-Chien Huang, New Taipei, TW;
Assignee:
Elite Semiconductor Memory Technology Inc., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01); G11C 8/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for controlling operations of a delay locked loop (DLL) of a dynamic random access memory (DRAM) is provided herein. A phase detector of the DLL compares an external clock signal with a feedback clock signal to generate a first control signal. A delay line circuit of the DLL delays the external clock signal according to the first control signal. A detector of the DRAM detects variations of the first control signal to determine a length of an enable period of an enable signal. The delay line circuit and the output buffer are active only during the enable period when the DRAM is in a standby mode.