Title :
Fast voltage control scheme with adaptive voltage control steps and temporary reference voltage overshoots for dynamic voltage and frequency scaling
Author :
Ikenaga, Yoshifumi ; Nomura, Masahiro ; Nakazawa, Yoetsu ; Hayashi, Yoshihiro
Author_Institution :
LSI Fundamental Res. Lab., NEC Electron. Corp., Sagamihara
Abstract :
We have developed a voltage control scheme to reduce control time using a delay monitor and step-by-step supply-voltage control. With this scheme, voltage control steps are adaptively controlled, and there are temporary overshoots in the reference voltage. Experimental results with a 65-nm CMOS device indicate that the adaptive voltage control steps successfully reduce the voltage control time by about 35 % over that with fixed step. Simulation results indicate that temporary reference voltage overshoots reduce control time by more than 50%. The combination of these schemes is also effective for control time reduction.
Keywords :
CMOS integrated circuits; adaptive control; power aware computing; voltage control; adaptive voltage control; dynamic voltage scaling; fast voltage control scheme; frequency scaling; size 65 micron; temporary reference voltage; Adaptive control; Circuits; Clocks; Delay effects; Dynamic voltage scaling; Frequency; Monitoring; Programmable control; Regulators; Voltage control; CMOS; dynamic voltage and frequency scaling (DVFS); regulator;
Conference_Titel :
Solid-State Circuits Conference, 2008. A-SSCC '08. IEEE Asian
Conference_Location :
Fukuoka
Print_ISBN :
978-1-4244-2604-1
Electronic_ISBN :
978-1-4244-2605-8
DOI :
10.1109/ASSCC.2008.4708734