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In this chapter we will discuss the basic operation of the op amp, one of the most common linear design building blocks. In section 1 the basic operation of the op amp will be discussed. We will concentrate on the op amp from the black box point of view.
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Op Amp Fundamentals •The Voltage Follower (Unity Gain Amplifier) Basic Op Amp Configurations : •Non-inverting Amplifier •A resistance transformer •The source does not deliver any current to load “a” is the open loop gain of the Op Amp
The Analog Engineer’s Circuit Cookbook: Op Amps provides operational amplifier (op amp) sub-circuit ideas that can be quickly adapted to meet your specific system needs. Each circuit is presented as a “definition-by-example.”
Assume zero input current: in most circuits, the current at the op-amp input terminals is much smaller than the other currents in the circuit, so we assume it is zero.
For example, op -amps amplify analog signals from various sensors in IoT-connected home appliances and measuring instruments. Voltage comparators are one of the applications of op-amps.
Op amps make circuit design simple and robust. An op amp chip has a complex internal circuit (see Fig. 1), but from the user’s perspective, it can be treated by a simple equivalent circuit, making the design process very simple and straightforward, as compared to using discrete transistors.
