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Power consumption reduction in medical devices employing multiple supply voltages and clock frequency control

  • US 6,434,425 B1
  • Filed: 09/25/2001
  • Issued: 08/13/2002
  • Est. Priority Date: 04/29/1998
  • Status: Expired due to Fees
First Claim
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1. A method of limiting power consumption in a medical device having a plurality of circuits, comprising:

  • operating the plurality of circuits at predetermined clock speeds;

    operating the plurality of circuits at predetermined supply voltage levels;

    operating at least two or more of the plurality of circuits at different clock speeds;

    changing the supply voltage levels on the fly as required by specific circuit timing functions being performed by the plurality of circuits and the operating clock speeds; and

    adjusting back gate bias on the fly for the plurality of circuits based on the supply voltage levels applied to the circuits.

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