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the constant voltage-driven bridge sensor circuit constitute

2016-05-17 13:42  
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the constant voltage-driven bridge sensor circuit constituted by OP amplifier feedback loop
the constant voltage-driven bridge sensor circuit constituted by OP amplifier feedback loop
Circuit function This is a drive, detection circuit that is suitable for use bridge sensors.It is Driven by constant voltage, the voltage is ± 2.5V, if necessary to use the IC generating reference voltage,it can also use ± 5V or ± 10V. Circuit Work OP amplifier A1 is a +2.5 V reference voltage generating circuit, in order to output ten mA current, adds the current enhancer TT1. If the resistance of the bridge sensor is equivalent, A2's inverting input is hypothetical, so TT2 emitter voltage should be -2.5V.