Page 23 - Semester-IV-Electronics

 When the input voltage is applied between inverting terminal and

ground terminal and then the positive terminal (non-inverting

terminal) is connected to the ground and the circuit is called inverting

amplifier.

 When inverting amplifier is grounded through Z and signal voltage
1
is applied between non-inverting terminal and ground, then the

circuit is called non-inverting amplifier.

 Inverting Amplifier

4
 As the voltage gain of an OP-AMP is very high (-10 ) and the
maximum value of output voltage is 10V, so the potential difference

between the negative terminal G and ground terminal is very small,

-3
usually of the order of 10 V, i.e. V is almost zero.
1
 In other words, the point G inspite of not being connected to ground

can be assumed to be virtual ground apparently. Thus, current

flowing through Z is,
1

 =

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