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Sensor output circuit

  • US 8,397,571 B2
  • Filed: 05/17/2010
  • Issued: 03/19/2013
  • Est. Priority Date: 06/01/2009
  • Status: Expired due to Fees
First Claim
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1. An output circuit, comprising:

  • a first capacitor sequentially provided with sensor measurement signals from a plurality of sensors;

    a differential amplification circuit arranged for each sensor and including a first terminal, which receives a voltage of the first capacitor, and a second terminal, which receives a reference voltage for correcting the sensor measurement signals;

    a hold capacitor arranged in each differential amplification circuit between an output terminal and the first terminal;

    a correction coefficient generation circuit that sequentially provides correction coefficients for correcting the sensor measurement signals of the sensors;

    a second capacitor that accumulates the correction coefficients from the correction coefficient generation circuit and provides the correction coefficients to the second terminal of the differential amplification circuit; and

    a first switch circuit that connects the second capacitor to each differential amplification circuit in synchronism with the sensor measurement signals.

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