The unity-gain op amp (operational amplifier) buffer circuit is routinely used to transform high-impedance inputs into low-impedance outputs. ADC (analog-to-digital converter) voltage references are ...

The buffer does help, but there is still distortion. The narrator mentions he probably should have used a worse op amp to accentuate the problems with trying to drive high capacitive loads ...

The AD797 offers 1kHz noise performance less than 2nV/√Hz in this circuit, compared to about 5nV/√Hz for the OP113. With any buffer amplifier, Kelvin sensing can be used at the load point, a technique ...

It starts with an op-amp buffer feeding a diode and capacitor. The capacitor is charged through the diode and holds the level, which can be read through another op-amp.

That’s ambitious enough, but itmust buffer ±40V signals using ±50V supplies. The buffer input would be connected to either a high impedance divider or directlyto external signals. Thus, it must also ...