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:
Sep. 16, 2014
Filed:
Nov. 01, 2011
Edward M. Mccombs, Austin, TX (US);
Stephen C. Horne, Austin, TX (US);
Alexander E. Runas, Austin, TX (US);
Daniel C. Chow, Austin, TX (US);
Edward M. McCombs, Austin, TX (US);
Stephen C. Horne, Austin, TX (US);
Alexander E. Runas, Austin, TX (US);
Daniel C. Chow, Austin, TX (US);
Apple Inc., Cupertino, CA (US);
Abstract
A memory includes a wordline driver having reduced leakage. The memory includes a storage array coupled to a first voltage supply, and a number of wordline driver units each including a driver inverter. During a low power mode, the voltage of the voltage supply coupled to the wordline circuit is reduced or removed, while the voltage of the voltage supply coupled to the storage array is kept at least at a retention voltage. In addition a p-type transistor is coupled between the array voltage supply and an input to the wordline driver inverter, thereby keeping the output of the wordline driver inverter at a low logic level to prevent inadvertent wordline firing.