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.:

US 9070433 B1

PDF
Full Text
Expired
Date of Patent:
Jun. 30, 2015

Filed:

Mar. 11, 2014
Applicant:

International Business Machines Corporation, Armonk, NY (US);

Inventors:

Paul A. Bunce, Poughkeepsie, NY (US);

Yuen H. Chan, Poughkeepsie, NY (US);

John D. Davis, Maybrook, NY (US);

Diana M. Henderson, Poughkeepsie, NY (US);

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01); G11C 5/14 (2006.01); G11C 11/419 (2006.01);
U.S. Cl.
CPC ...
G11C 5/147 (2013.01); G11C 11/419 (2013.01);
Abstract

A technique to generate timing control for an SRAM circuit operating with dual power supplies is provided. A voltage signal is generated by a programmable local clock buffer that receives power from a first voltage level. The voltage signal is shifted higher by a level shifter that receives power from both the first voltage level and a second voltage level. The voltage signal is delayed by a delay clock chopper circuit that receives power from the second voltage level. The delay clock chopper circuit includes a programmable pulse width variation (PWVAR) circuit that varies the pulse width of the voltage signal. The PWVAR circuit receives power from the second voltage level. The voltage signal drives a global bitline of the SRAM. The voltage signal has timing sensitive to both the first and second voltage levels. The voltage signal has its pulse width sensitive to the second voltage level.


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Bunce, Paul. (2015). Sram supply voltage global bitline precharge pulse (U.S. Patent No. 9070433). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9070433

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