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:
Nov. 06, 2012
Filed:
Sep. 20, 2010
Cheng Hung Lee, Hsinchu, TW;
Chung-yi Wu, Taipei, TW;
Hsu-shun Chen, Toufen Town, TW;
Chung-ji LU, Fongyuan, TW;
Cheng Hung Lee, Hsinchu, TW;
Chung-Yi Wu, Taipei, TW;
Hsu-Shun Chen, Toufen Town, TW;
Chung-Ji Lu, Fongyuan, TW;
Abstract
An SRAM includes circuitry configured for the SRAM to operate at different operation modes using different voltage levels wherein the voltage level and thus the supply current leakage is regulated based on the operation mode. For example, the SRAM, in a normal operation mode, consumes power as other SRAMs. In a deep sleep mode the supply voltage (e.g., VDDI) for the bit cell in the SRAM macro is lowered by about 20-40% of the SRAM supply voltage (e.g., VDD), sufficient to retain the data in the bit cell. When access to the SRAM is not needed, the SRAM operates in the sleep mode, consuming little or no power.