| 摘要 |
A bridge circuit serving as a detector of a physical variable such as pressure has four resistors forming a wheatstone bridge, one of the resistors changing resistance according to variations in the physical variable to be measured. Voltage difference between a mutually opposite pair of junctions of the four resistors is measured by one circuit and that between the other mutually opposite pair of junctions is measured by another circuit. The effect of temperature variation is calculated from these measured values to reduce the drift in the value of pressure calculated from the voltage imbalance of the wheatstone bridge.
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