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Figure 1 shows two largesignal measurement methods. The first uses a tworesistor voltage divider and an output buffer, and the second comprises an attenuating inverter and a highvalue input resistor. Both of these approaches introduce measurementlinearity errors because only a single resistor dissipates power, which leads to selfheating and its associated change in resistance. In addition, the amplifier and the remaining resistors introduce a combination of offset current, offset ...  Measurement circuit features high commonmode rejection
Modern measurement systems often operate with single 5V power supplies, yet their input signals may have large commonmode voltages that exceed the supply by tens or hundreds of volts. Also, unless the converter is driven differentially, the noise on the analogtodigital converter (ADC) reference pin is indistinguishable from a real signal. The circuit of Figure 1 solves both of these problems. It provides a gain of 2, along with differential inputs and a differential output. The ADC ...  Difference amplifier measures high voltages
Figure 1 shows two largesignal measurement methods. The first uses a tworesistor voltage divider and an output buffer, and the second comprises an attenuating inverter and a highvalue input resistor. Both of these approaches introduce measurementlinearity errors because only a single resistor dissipates power, which leads to selfheating and its associated change in resistance. In addition, the amplifier and the remaining resistors introduce a combination of offset current, offset ...
