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Adaptive body bias for clock skew compensation

  • US 7,015,741 B2
  • Filed: 12/23/2003
  • Issued: 03/21/2006
  • Est. Priority Date: 12/23/2003
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • a bias voltage distribution network comprising a central bias generator to produce at least one reference voltage, and a plurality of local bias generators to receive the at least one reference voltage and produce a plurality of bias voltages;

    a plurality of clock buffers having transistor bodies coupled to receive the plurality of bias voltages from the bias voltage distribution network; and

    at least one comparison circuit coupled between the plurality of clock buffers and the bias voltage distribution network, wherein the at least one comparison circuit comprises a phase detector to measure a phase difference between signals driven by at least two of the plurality of clock buffers, and to provide an error signal to the bias voltage distribution network;

    wherein both the central bias generator and the at least one local bias generator are coupled to receive the error signal.

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