A 1-V multithreshold-voltage CMOS digital signal processor for mobile phone application

Shin'ichiro Mutoh, Satoshi Shigematsu, Yasuyuki Matsuya, Hideki Fukuda, Takao Kaneko, Junzo Yamada

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

A 1-V power supply low-power and high-speed 16-b fixed-point digital signal processor using a 0.5-μm process has been developed for mobile phone applications. A 1-V multithreshold-voltage CMOS (MTCMOS) technology that uses both high-threshold-voltage and low-threshold-voltage transistors is one key to attaining low power consumption with keeping processing throughput high. A maximum operating frequency of 13.2 MHz and an energy consumption of 2.2 mW/MHz were achieved at 1 V. The second key to low-power operation is a power management scheme that uses a secondary embedded microprocessor. This proposed scheme minimizes the standby power in the waiting state by effectively controlling the sleep mode in the MTCMOS design. We confirmed that the standby leakage current was reduced three orders of magnitude and that the energy consumed in the waiting state was less than 1/10 of that consumed by conventional CMOS circuits with lowered supply voltage and threshold voltage but without power management.

Original languageEnglish
Pages (from-to)1795-1802
Number of pages8
JournalIEEE Journal of Solid-State Circuits
Volume31
Issue number11
DOIs
Publication statusPublished - 1996 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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