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System and method for controlling motor speed using a biased pulse width modulated drive signal

  • US 7,193,377 B2
  • Filed: 03/04/2004
  • Issued: 03/20/2007
  • Est. Priority Date: 03/04/2004
  • Status: Expired due to Fees
First Claim
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1. A motor drive circuit, comprising:

  • a switching circuit including an input node adapted to receive a drive signal and a control node adapted to receive a control signal, the switching circuit operable to couple the input node to an output node responsive to the control signal;

    a bias element adapted to receive an input signal and coupled to the output node of the switching circuit, the bias element operable to automatically develop a bias voltage on the output node responsive to the input signal.

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