Thermocouple Cold Junction Compensation Amplifier
Source: InternetPublisher:闪电杰克 Keywords: amplifier thermocouple output voltage Updated: 2020/03/17
AD587 generates a 10. OOV precision reference voltage and adds it to the compensation diode
IN4148 and the thermocouple through a 27kfl resistor, and provides a fixed operating point for the VI+N terminal of the differential amplifier. The output voltage of the thermocouple is added to
the ② pin of the differential amplifier. INA 131 is an amplifier with a gain of 100. The output voltage vo=100 (咐-Va). Once 咒 is set
, the change in the output voltage is determined by Va. Therefore, n can adjust the operating point of the amplifier .
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