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High-efficiency H-bridge circuit using switched and linear stages

  • US 6,486,643 B2
  • Filed: 08/27/2001
  • Issued: 11/26/2002
  • Est. Priority Date: 11/30/2000
  • Status: Expired due to Term
First Claim
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1. An H bridge regulating system for driving an electric load, the H bridge system comprising:

  • a linear output stage, the linear output stage having a linear mode amplifier with inverting and non-inverting inputs and a feedback circuit with a first element, the amplifier generating a first output signal, the first output signal passing through the first element of the feedback circuit to the inverting input of the linear mode amplifier;

    a switch mode output stage, the switch mode output stage having a switch mode amplifier with inverting and non-inverting inputs and a feedback circuit with a first element, the switch mode amplifier generating a second output signal, the second output signal passing through the first element of the feedback circuit of the switch mode output stage to the inverting input of the switch mode amplifier, and wherein the outputs of the linear mode amplifier and the switch mode amplifier are simultaneously connectable to an electric load to be driven.

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