Amplifiers are a big part of the subject of electronics. The amplifiers have a huge variety of applications in scientific projects and everyday life. A specific of amplifier type used widely is the operational amplifier. Operational amplifiers are used in so many different ways that it is not possible to describe all of the applications. Entire books are devoted entirely to the applications of operational amplifiers and are not concerned in theory of operation or other circuits at all. This project will provide all the introductory theory about the operation of the operational amplifiers and will analyze a few basic and well-known applications.

A few words about Operational amplifiers

The name operational amplifier was originally adopted for a series of high performance DC (Direct Current) amplifiers used in analog computers. These amplifiers were used to perform mathematical operations applicable to analog computation such as summation, scaling, subtraction, integrating and essentially any feedback operation. The applications of operational amplif

To see if this output (-50 V) is what the circuit will produce with the inputs given above, start by calculating the currents through the input resistors, R1 and R2 (remember that point A is at virtual ground):

Op amps are easily used to generate constant-potential or constant-current signals.

The 741C requires a typical input bias current of 80 nA (that's nanoAmperes, where 1 nA = 10-9 A). The maximum input bias current for the 741C is 500 nA, or 0.5 µA.

Some topics in this essay:
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