Variable supply-voltage scheme with 95%-efficiency DC-DC converter for MPEG-4 codec

Fuyuki Ichiba, Kojiro Suzuki, Shinji Mita, Tadahiro Kuroda, Tohru Furuyama

Research output: Contribution to conferencePaper

29 Citations (Scopus)

Abstract

A variable supply-voltage (VS) scheme with a high power-conversion-efficiency DC-DC converter is presented. A new pulse width modulation (PWM) circuit for the DC-DC converter is proposed to reduce both of power consumption and chip area. The power conversion efficiency reaches up to 95%, and the area is less than half of the conventional design. The VS scheme contains critical path replica circuits of an MPEG-4 codec LSI, and its output voltage is controlled by monitoring delay time of the replica circuits. Consequently the VS scheme can automatically generate minimal internal supply voltage that meets the demand from the operation frequency of an MPEG-4 codec LSI. The advantages of this circuit are successfully demonstrated through fabrication of a test chip using a 0.3 μm CMOS technology.

Original languageEnglish
Pages54-59
Number of pages6
Publication statusPublished - 1999 Dec 1
Externally publishedYes
EventProceedings of the 1999 International Conference on Low Power Electronics and Design (ISLPED) - San Diego, CA, USA
Duration: 1999 Aug 161999 Aug 17

Other

OtherProceedings of the 1999 International Conference on Low Power Electronics and Design (ISLPED)
CitySan Diego, CA, USA
Period99/8/1699/8/17

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Ichiba, F., Suzuki, K., Mita, S., Kuroda, T., & Furuyama, T. (1999). Variable supply-voltage scheme with 95%-efficiency DC-DC converter for MPEG-4 codec. 54-59. Paper presented at Proceedings of the 1999 International Conference on Low Power Electronics and Design (ISLPED), San Diego, CA, USA, .