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A differential amplifier with a common mode voltage up to ±1000V composed of INA110
Source: InternetPublisher:D先生 Keywords: differential amplifier Updated: 2023/12/18
The figure shows a differential amplifier circuit with a common-mode input voltage up to ±1000V. This circuit uses a field effect transistor (FET) input instrument amplifier INA110 and an input resistor divider. The voltage dividers at the inverting input terminal and the non-inverting input terminal are composed of R1, R2 and R3, R4 respectively. Since R1=R3, R2=R4, the voltage dividing ratio of the voltage divider is:
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