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Power supply having a synchronous rectifier circuit for improved switching timing

  • US 5,946,207 A
  • Filed: 08/03/1998
  • Issued: 08/31/1999
  • Est. Priority Date: 08/04/1997
  • Status: Expired due to Term
First Claim
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1. A synchronous rectifier comprising a rectifier diode (D);

  • a transistor (T) having a control electrode, and a main current path between a first main electrode and a second main electrode of the transistor (T), which main current path is coupled in parallel with the rectifier diode (D); and

    a control circuit (CT) coupled to the control electrode of the transistor (T), characterized in that the control circuit (CT) comprises an amplifier (AMP) having a first input coupled to the first main electrode of the transistor (T), a second input coupled to the second main electrode of the transistor (T), and an output coupled to the control electrode of the transistor (T), and a reference voltage source (RF1) is coupled in series with at least one of the inputs, i.e. the first and the second input, of the amplifier (AMP).

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