Explain the working of inverting amplifier using OP. amp. Derive the
expression for its gain. How this circuit can be changed for sign changer.
Answers
Answer:
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Answer:
Explanation:
In this Inverting Amplifier circuit, the operational amplifier is connected with feedback to produce a closed-loop operation. ... This is because the junction of the input and feedback signal ( X ) is at the same potential as the positive ( + ) input which is at zero volts or ground then, the junction is a “Virtual Earth”.
In an amplifier, the output signal is either voltage control or current control. ... Also from this, we see the output voltage of the amplifier. Vout= -(Rout/Rin)Vin. We see that the (-) sign indicates that the output of on amplifier is vertical as compared to its input, hence the amplifier gain is -(Rout/Rin).
If the impedance Z1 and Z f are equal in magnitude° and phase, then the closed loop voltage gain is -1, and the input signal will undergo a 180 phase shift at the output. Hence, such circuit is also called phase inverter.