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Linearized temperature sensor

  • US 6,183,131 B1
  • Filed: 03/30/1999
  • Issued: 02/06/2001
  • Est. Priority Date: 03/30/1999
  • Status: Expired due to Term
First Claim
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1. A temperature sensor comprising:

  • a reference voltage circuit producing a reference voltage;

    a thermometer circuit producing a temperature dependent correction voltage;

    a first summing circuit coupled to said reference voltage circuit and said thermometer circuit, said first summing circuit producing a voltage output signal that is the sum of said correction voltage and said reference voltage;

    a normalizing circuit receiving said voltage output signal and a temperature dependent voltage;

    an amplifier circuit coupled to said normalizing circuit, said amplifying circuit producing a scaling factor, wherein said normalizing circuit produces a temperature output signal by generating a ratio of said temperature dependent voltage and said voltage output signal multiplied by said scaling factor; and

    a second summing circuit coupled to said normalizing circuit and receiving said temperature output signal, said second summing circuit summing said temperature output signal with a temperature offset correction factor to generate a corrected temperature output signal.

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