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Current sensing circuit

  • US 4,553,084 A
  • Filed: 04/02/1984
  • Issued: 11/12/1985
  • Est. Priority Date: 04/02/1984
  • Status: Expired due to Term
First Claim
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1. A current sensing circuit coupled between a load having a load current passing therethrough and a supply voltage terminal, comprising:

  • a first current means coupled between said load and said supply voltage terminal for carrying a first portion of said load current;

    resistive means coupled to said supply voltage terminal for providing a voltage drop;

    second current means coupled between said load and said resistive means for carrying a second portion of said load current, said first portion being substantially larger than said second portion;

    control means coupled to said first current means and said second current means for biasing said first current means and said second current means;

    output means coupled to a first node between said second current means and said resistive means for providing an output.

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