Adaptive voltage control for SRAM

Details Adaptive voltage control for SRAM Adaptive voltage control for SRAM

2011-05-03

2011-05-03

Pham, Ly D (Department: 2827)

Static information storage and retrieval

Systems using particular element

Flip-flop

C365S201000, C703S013000, C703S023000, C714S721000

Reexamination Certificate

active

07936589

ABSTRACT:
The present invention pertains to semiconductor memory devices, and particularly to a system and method for adaptively setting the operating voltages for SRAM for both Vtrip and SNM to reduce power while maintaining functionality and performance, based on modeling and characterizing a test structure. One embodiment comprises an SRAM array, a test structure that characterizes one or more parameters that are predictive of the SRAM functionality and outputs data of the parameters, a test controller that reads the parameters and identifies an operating voltage that satisfies predetermined yield criteria, and a voltage controller to set an operating voltage for the SRAM array based on the identified operating voltage. One method sets an operating voltage for an SRAM by reading test structure data of the parameters, analyzing the data to identify an operating voltage that satisfies predetermined yield criteria, and setting the operating voltage for the SRAM based on the identified operating voltage.

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