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Semiconductor integrated circuit device

  • US 20040164786A1
  • Filed: 02/24/2004
  • Published: 08/26/2004
  • Est. Priority Date: 02/26/2003
  • Status: Active Grant
First Claim
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1. A semiconductor integrated circuit device comprising:

  • a power transistor that feeds a large current to a load;

    a first transistor of which a second electrode and a control electrode are connected respectively to a second electrode and a control electrode of the power transistor;

    a second transistor of which one of a first electrode or a second electrode is connected to a first electrode of the first transistor; and

    an operational amplifier of which one input terminal is connected to a first electrode of the power transistor, of which another input terminal is connected to the first electrode of the first transistor, and of which an output terminal is connected to a control electrode of the second transistor, wherein the second transistor outputs, at another of the first and second electrodes thereof, a current signal proportional to a current flowing through the power transistor.

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