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Signal conditioning circuit for resistive sensors

  • US 20020190734A1
  • Filed: 08/02/2002
  • Published: 12/19/2002
  • Est. Priority Date: 02/22/2001
  • Status: Active Grant
First Claim
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1. A circuit for measuring an unknown resistance, said circuit comprising:

  • a first voltage input terminal and a second voltage input terminal;

    a first resistor input terminal and a second resistor input terminal;

    a first buffer having an input coupled to said first voltage input terminal and an output coupled to said first resistor input terminal;

    a second buffer having an input coupled to said second voltage input terminal and an output coupled to said second resistor input terminal; and

    a difference circuit configured to measure a difference in current between the current being supplied to said first resistor input terminal and the current being supplied to said second resistor input terminal, wherein, said difference in current is representative of a difference in resistance between a first resistance coupled to said first resistor input terminal and a second resistance coupled to said second resistor input terminal.

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