Instrumentation AmplifierOne drawback of the differential amplifier is that its input impedance () may not be high enough if the output impedance of the previous stage is not low enough. To overcome this problem, two non-inverters with high input resistance can be used each for one of the two inputs to the differential amplifier. The resulting circuit is shown below:
The analysis of this circuit is very simple. As the output impedance of the non-inverter...
