A standard op amp’s output is single-ended, but a fully differential amplifier has differential outputs. Fully differential amplifiers offer the ability to control the output common-mode voltage ...

A differential amplifier requires a current source – this may be either a fixed resistor to a negative supply or a current source as in this case. The fixed resistor is effective if the negative ...

INAs are specifically designed and used for their differential-gain and common-mode-rejection (CMR) capabilities. The INA will amplify the difference between the inverting and non-inverting inputs ...

The three op amp INA architecture can perform this function, with the input stage providing a high input impedance and the output stage filtering out the common mode voltage and delivering the ...

2. Discrete difference amplifier. Designed to amplify differential voltages, the operational amplifier itself provides good CMRR, but this is overwhelmed by the circuit surrounding it.

The op amp — short for operational amplifier — is a packaged differential amplifier. The ideal op amp — which we can’t get — has infinite gain and infinite input impedance.

In the last Circuit VR we looked at some basic op amp circuits in a simulator, including the non-inverting amplifier. Sometimes you want an amplifier that inverts the signal.