Operational amplifier (usually referred to as "operational amplifier") is a widely used circuit unit with ultra-high magnification. It can be composed of discrete devices or implemented in semiconductor chips. With the development of semiconductor technology, most operational amplifiers are monolithic. There are many kinds of operational amplifiers now, which are widely used in almost all industries.
Generally speaking, an operational amplifier can be simply regarded as a high-gain direct-coupled voltage amplifier with a signal output port and two high-resistance inputs, so it can be used to make noninverting, inverting and differential amplifiers. The power supply mode of operational amplifier is divided into dual power supply and single power supply.
For an operational amplifier with dual power supply, its output can change on both sides of zero voltage, and when the differential input voltage is zero, the output can also be set to zero. The output of a single power supply operational amplifier varies within a certain range between power supply and ground.
Extended data
Operational amplifier is a circuit unit named from the functional point of view, which can be realized by discrete devices or semiconductor chips. With the development of semiconductor technology, most operational amplifiers exist in monolithic form. There are many kinds of operational amplifiers now, which are widely used in almost all industries.
An amplifier circuit that can perform mathematical operations on signals. It was once the basic component of an analog computer, hence its name. The operational amplifier made of integrated circuit technology not only maintains the original characteristics of high gain and high input impedance, but also has the advantages of exquisiteness, cheapness and flexibility, so it has been widely used in active filter, DC signal amplification, waveform generation and transformation, signal processing and so on.
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