Process-temperature-frequency adaptive voltage scaled SRAM system for power reduction

High-performance Low-power static random access memories (SRAMs) are required in many battery-powered applications. This paper presents a process temperature frequency (PTF) adaptive voltage scale technique to reduce power. In the self-adaption phase, the optimal supply voltage is chose automatically according to PTF. So a significant reduction in power consumption can be achieved. Moreover, SRAMs can be accessed normally when they are in the self-adaption phase. Simulation results illustrate that saved power is more than 60% when supply voltage is changed from 1.2V to 0.7V. The optimal supply voltage is dependent on different process corners, temperatures and operating frequencies.