A dynamic voltage scaled microprocessor system

A microprocessor system is presented in which the supply voltage and clock frequency can be dynamically varied so that the system can deliver high throughput when required while significantly extending battery life during the low speed periods. The system consists of a dc-dc switching regulator, an...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2000-11, Vol.35 (11), p.1571-1580
Main Authors: Burd, T.D., Pering, T.A., Stratakos, A.J., Brodersen, R.W.
Format: Article
Language:English
Subjects:
Batteries
Battery
Clocks
CMOS integrated circuits
CMOS process
Dynamic voltage scaling
Dynamical systems
Dynamics
Electric potential
Energy consumption
Frequency
Low speed
Microprocessors
Random access memory
Regulators
Throughput
Voltage
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Summary:A microprocessor system is presented in which the supply voltage and clock frequency can be dynamically varied so that the system can deliver high throughput when required while significantly extending battery life during the low speed periods. The system consists of a dc-dc switching regulator, an ARM V4 microprocessor with a 16-kB cache, a bank of 64-kB SRAM ICs, and an I/O interface IC. The four custom chips were fabricated in a standard 0.6-/spl mu/m 3-metal CMOS process. The system can dynamically vary the supply voltage from 1.2 to 3.8 V in less than 70 /spl mu/s. This provides a throughput range of 6-85 MIPS with an energy consumption of 0.54-5.6 mW/MIP yielding an effective energy efficiency as high as 26200 MIPS/W.
ISSN:0018-9200
1558-173X
DOI:10.1109/4.881202