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. 26, 2013
Filed:
Apr. 25, 2012
Chad A. Adams, Byron, MN (US);
Sharon H. Cesky, Rochester, MN (US);
Elizabeth L. Gerhard, Rochester, MN (US);
Jeffrey M. Scherer, Rochester, MN (US);
Chad A. Adams, Byron, MN (US);
Sharon H. Cesky, Rochester, MN (US);
Elizabeth L. Gerhard, Rochester, MN (US);
Jeffrey M. Scherer, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and circuit for implementing write assist for Static Random Access Memory (SRAM) arrays, and a design structure on which the subject circuit resides are provided. The circuit includes a write driver including a common bit line supply node, and a common bit line source node. The circuit includes voltage boost circuitry that temporarily boosts the common bit line supply node above supply voltage and temporarily boosts the common bit line source node below source voltage through isolation devices for applying the boosted source and supply voltages to a selected SRAM cell during a write operation. Splitting the boost differential between the common bit lines decreases an overall device voltage differential for providing substantially enhanced reliability of the SRAM array.