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Active voltage positioning implementation for microprocessor power supplies or the like

  • US 7,098,637 B2
  • Filed: 05/10/2004
  • Issued: 08/29/2006
  • Est. Priority Date: 05/12/2003
  • Status: Active Grant
First Claim
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1. A power supply controller comprising:

  • an error correction circuit including an error amplifier, an input circuit for the error amplifier, and a feedback compensation network; and

    an active voltage positioning (AVP) circuit which cooperates with the error correction circuit to maintain the voltage output of the power supply within a predetermined voltage range Vmax to Vmin independent of rapid changes in power supply load current,the AVP circuit including;

    a buffer circuit having an output connected to the input circuit for the error amplifier;

    an AVP signal source coupled to provide an input to the buffer circuit which varies according to the power supply output current; and

    a compensation circuit operative to control the transient behavior of the buffer circuit in response to changes in the buffer circuit input provided by the AVP signal source.

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