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Difference Amplifier
Last modified by Microchip on 2023/11/09 09:03
The circuit below shows a difference amplifier using an op-amp. It presents an impedance of R1 to each end of the sensor (VSEN+ - VSEN-). The gain transfer function of the difference amplifier is also shown in the figure.
Advantages
Resistive isolation from the source
Large input voltage range is possible
Reject common mode noise; it's good for remote sensors
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