Question

Typed please. List an application of an inverting op-amp circuit, the advantages of the inverting op-amp configuration, and why you would use an inverting op-amp as opposed to other configurations.

Answer 1

INVERTING OP-AMP CONFIGURATION

ADVANTAGES

1. It follows the negative feedback for amplifier . On positive feedback it will behave like an oscillator.

2. The gain factor is very high i.e. G = -Rf / R1 .

3. Input and output are out of phase by 180° ( -ve sign in gain represents 180 deg. phase shift ) .

4. Both the inverting and non inverting terminals same potential values (Virtual Ground Concept ) .

APPLICATIONS

1. As the output generated is of 180° phase shift . So, can be used as phase shifter.

2. It can be practically used in the application of integration , differentiation and signal filterting (low pass, high pass ,band pass ) .

3. It can be used as voltage summer circuit .

4. At the applications where the signal must be balanced inverting amplifiers are used .

5. In the concept of mixers when the radio frequency signals are present inverting amplifiers are used .

6. Any application or the system prototype that is designed with the sensors prefer inverting amplifiers at the output stage .

ADVANTAGE OVER OTHER CONFIGURATION

Inverting op-amp circuits are : more stable , have lower distortion , have better transient response and are immune to low common mode rejection ratio .

Non - inverting circuits have higher input impedances and higher bandwidth in low gain applications , but have a significant common mode response which may be non-linear