In the inverting amplifier,only one input is applied and that is to the inverting input terminal.The non-inverting input terminal is grounded since V1=0V and V2=Vin.

Therefore Vo = -A(Vin)

The negative sign indicates the output voltage is out of phase with respect to input by 180 degree or is of opposite polarity.Thus in the inverting amplifier,The input signal is amplified by gain A and is also inverted at the output.

Non-Inverting Amplifier

In this configuration ,the input is given to the non inverting input terminal and the inverting terminal is connected to ground.

In the circuit,V1=Vin and V2=0V therefore the output voltage Vo=AVin.This means that the output voltage is larger than the input voltage by gain A and is in phase with the input signal

If you enjoyed this post, make sure you subscribe to my RSS feed!