| 摘要 |
PURPOSE:To enable the highly accurate detection of a physical quantity to be measured, by providing a pair of gage resistances whose resistance values change differentially according to the physical quantity to be measured and a compensation voltage generating means so as to compensate an effect produced by fluctuations of ambient temperature. CONSTITUTION:A current IS is supplied from a current source 21 to a series circuit of paired gage resistances 15 and 16 through the intermediary of a current detecting resistance 22. Subsequently, the opposite-end voltages Ea and Eb of the gage resistances 15 and 16 and the opposite-end voltage Ec of a current detection resistance 22 are supplied to detection amplifiers 23a, 23b and 23c respectively. An arithmetic circuit 24 conducts the operation of the formula by using voltages E1 and E2 outputted from the amplifiers 23a and 23b and a compensation voltage E3 outputted from the amplifier 23c. An effect produced by fluctuations of ambient temperature is compensated effectively thereby, and thus a physical quantity to be measured can be detected with high accuracy.
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