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. 20, 2012
Filed:
Jun. 13, 2011
Daniel Shimizu, Sunnyvale, CA (US);
Chi-shung David Wang, Sunnyvale, CA (US);
Qi Chen, Sunnyvale, CA (US);
Daniel Shimizu, Sunnyvale, CA (US);
Chi-Shung David Wang, Sunnyvale, CA (US);
Qi Chen, Sunnyvale, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
Embodiments of a dynamic leakage control circuit for use with graphics processor circuitry are described. The dynamic leakage control circuit selectively enables back biasing of the transistors comprising the graphics processor circuits during particular modes of operation. The back biasing levels are controlled by two separate power rails. A first power rail is coupled to an existing power supply and the second power rail is coupled to a separate adjustable voltage regulator. A separate voltage regulator may also be provided for the first power rail. A hardware-based state machine or software process is programmed to detect the occurrence of one or more modes of operation and adjust the voltage regulators for the first and second power rails to either enable or disable the back biasing state of the circuit, or alter the threshold voltage of the circuit within a specified voltage range.