Class 12 > Unit # 22:Solid State of Electronics > Inverting Op-amp vs Non-Inverting Op-amp

Talha's Physics Academy

Difference Between Inverting and Non-Inverting Op-Amp

Differentiating Inverting and Non-Inverting Amplifiers

"Operational amplifiers can be configured in two fundamental modes based on how the input signal is applied: inverting and non-inverting configurations."

Feature	Inverting Amplifier	Non-Inverting Amplifier
Input Connection	Applied to the inverting ($-$) terminal via an input resistor.	Applied directly to the non-inverting ($+$) terminal.
Phase Relationship	Output is $180^\circ$ out of phase with the input.	Output is in phase ($0^\circ$ phase shift) with the input.
Feedback	Negative feedback is supplied from output to the inverting ($-$) terminal.	Negative feedback is supplied from output to the inverting ($-$) terminal.

1. Inverting Op-Amp

A type of op-amp that is designed to generate a signal at the output which is $180^\circ$ out of phase with the applied input is known as an inverting amplifier. This implies that if the phase of the applied input signal is positive, then the amplified signal will be in a negative phase. In a similar way, for a signal with a negative phase, the phase of the output will be positive.

In this type of amplifier, feedback is provided to the op-amp so as to have closed-loop operation of the circuit. To ensure accurate operation of the circuit, negative feedback is applied. Thus, to have a closed-loop circuit, the input as well as the feedback signal from the output is provided at the inverting terminal of the op-amp.

Fig:Inverting Op-Amp configurations.