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The circuit of measuring bridge amplifier

2016-05-19 04:31  
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The circuit of measuring bridge amplifier
The circuit of measuring bridge amplifier
The measurement circuit shown in figure a is composed of resistors R1 ~ R4, the output voltage UBr may be DC or AC voltage ( up to 100kHz), if it is AC voltage, it can use capacitive coupling (Figure d ). In both cases, it can use high ohmic isolation circuit (Figure c) to connect to the input and output ends. Figure b shows unbalanced and balanced adjustment gain curve of bridge circuit.