Non Inverting Amplifier Circuit Diagram

Non Inverting Amplifier Circuit Diagram:

The Non Inverting Amplifier Circuit Diagram shown in Fig. 14.7 is commonly known as a Non-Inverting amplifier with feedback (or closed loop Non-inverting amplifier), because it used a feedback and the input signal is applied to the non-inverting input terminal of the opamp. The closed loop gain of the non-inverting amplifier can be found as follows:

Non Inverting Amplifier Circuit Diagram

The closed loop gain AF = AF=Vo/Vin

From the circuit (Fig. 14.7), the output voltage is given by

Non Inverting Amplifier Circuit Diagram

But V1 = Vin and V2 = VF, VF can be found by using the voltage divider law.

Non Inverting Amplifier Circuit Diagram

Substituting values of V1 and V2 Eq. (14.2) we have,

Non Inverting Amplifier Circuit Diagram

Generally A is very large typically 105 hence

Non Inverting Amplifier Circuit Diagram

Therefore,

Non Inverting Amplifier Circuit Diagram

.-. the closed loop voltage gain for an non-inverting amplifier is

Non Inverting Amplifier Circuit Diagram