Title :
A low power switching power supply for self-clocked systems
Author :
Wei, Gu-Yeon ; Horowitz, Mark
Author_Institution :
Comput. Syst. Lab., Stanford Univ., CA, USA
Abstract :
This paper presents a digital power supply controller for variable frequency and voltage circuits. By using a ring oscillator as a method of predicting circuit performance, the regulated voltage is set to the minimum required to operate at a reference frequency which maximizes energy efficiency. Our initial test silicon, implemented with a fixed frequency controller is analyzed and reveals that the controller´s power consumption is a major limitation for such a design. To make the controller power dissipation scale with the CV2f power of the load, we introduce a new architecture with variable frequency control, which allows the controller´s supply and frequency to scale along with the load device
Keywords :
CMOS digital integrated circuits; clocks; delays; integrated circuit design; power supply circuits; voltage regulators; digital CMOS circuits; digital power supply controller; energy efficiency; fixed frequency controller; low power switching power supply; regulated voltage; ring oscillator; self-clocked systems; variable frequency control; Circuit optimization; Circuit testing; Digital control; Energy efficiency; Frequency; Power supplies; Ring oscillators; Silicon; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Low Power Electronics and Design, 1996., International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-3571-6
DOI :
10.1109/LPE.1996.547531
