**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:

The closed loop gain A_{F} = A_{F}=V_{o}/V_{in}

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

But V_{1} = V_{in }and V_{2} = V_{F}, V_{F} can be found by using the voltage divider law.

Substituting values of V_{1} and V_{2} Eq. (14.2) we have,

Generally A is very large typically 10^{5} hence

Therefore,

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