Tutorials

Study of OPAMP circuits: Inverting amplifiers, Adders, Integrators and Differentiators

Krishanu Mitra
24 Apr 2017
Read Time : 10 Minutes
Study of OPAMP circuits: Inverting amplifiers, Adders, Integrators and Differentiators

To study the various Operational Amplifiers (OPAMPs) like in an inverting amplifier, the input signal is applied through a series input resistor R1 to the inverting input. Also, the output is feed back through Rf to the same input. The non-inverting input is grounded. An expression for the output voltage of the inverting amplifier is written as:

The “–ve” sign indicates inversion. The closed-loop gain of the inverting amplifier is, thus

The input & output impedances of an inverting amplifier are:

The output impedance of both the non-inverting and inverting amplifier configurations is very low; in fact, it is almost zero in practical cases. Because of this near zero output impedance, any load impedance connected to the op-amp output can vary greatly and not change the output voltage at all.
Similarly the remaining details of the various OPAMPs are discussed here.

For more details, kindly download the link

Follow us on Facebook_Page, Youtube_Channel and Join us on Facebook_Group