Pressure measurement circuit diagram composed of OP27

Published:2011/4/29 2:24:00 Author:Nicole | Keyword: Pressure measurement | From:SeekIC

The figure 1 is a pressure measurement circuit which is composed of OP27. In the circuit, the instrumentation amplifier is composed of A1、A2、A4, the amplitude limiter circuit is composed of input partial four 7V regulator tubes. PR1 and PR2 is used to adjust the input bias current of A1, A2 to 200nA. In order to improve the common-mode rejection ratio, it should be connected to circuit, RP3 is used to adjust the common-mode rejection ratio. VT1-VT4 and A7, A8 provide pressure sensor with work power supply.



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