Chopper amplifier circuit and semiconductor device
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United States of America Patent
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Jan 20, 2009
Issued Date -
N/A
app pub date -
Aug 4, 2006
filing date -
Aug 8, 2005
priority date (Note) -
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Abstract
Provided is a chopper amplifier circuit capable of reducing an offset voltage of a sensor bridge and temperature characteristics of the offset voltage. An offset adjusting voltage generation circuit for generating a voltage equal to an offset voltage of a sensor bridge and an offset temperature characteristics adjusting voltage generation circuit for generating a voltage having temperature characteristics equal to those of the offset voltage are provided. These output voltages are chopper-modulated and subtracted from a chopper-modulated output signal of the sensor bridge.
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