# Operational Amplifier

An integrated circuit that can amplify weak electric signals is known as an operational amplifier. There are two input pins and one output pin in an operational amplifier. Its primary function is to amplify the voltage difference between the two input pins and output it.

An integrated circuit (IC) known as an operational amplifier (op-amp) amplifies the voltage difference between two inputs.
Because it can be set up to do math, it gets its name from that.
There are five terminals in an op-amp: non-inverting input, inverted input, and output, positive power supply, and negative power supply (GND). In most cases, the names of these terminals are as shown below. Single-supply op-amp symbols can be devoid of the positive and GND terminals.)
The voltage difference between the noninverting (IN(+)) and inverting (IN(-)) inputs is amplified by an op-amp. Equation 1 indicates that the voltage at its output is in phase with VIN(+) and in phase with VIN(-), respectively.

VOUTÂ = A * ( VIN(+)Â â€“ VIN(-)Â )

An op-amp is a voltage amplifier or comparator in its most basic form. It can also be set up as a phase shifter, buffer, voltage follower, and other configurations. Op-amps are now frequently used to amplify weak analog signals from sensors in a wide variety of IoT and home appliance devices.
Operation amps are for the most part involved with negative criticism to diminish item varieties in gain and extend the transfer speed. Op-amps are typically used in voltage followers, noninverting amplifiers, and inverting amplifiers, as depicted below.

Op-amps are categorized in a variety of ways. They are, for instance, categorized according to: 1) fabricating process (bipolar and CMOS), 2) power supply type (single-supply and double inventory), 3) input circuit (differential P-channel MOSFET pair, differential N-channel MOSFET pair, rail-to-rail input, and so on.), and 4) electrical characteristics like low noise, low current consumption, and low input offset, among other things. Applications can also be used to classify op-amps. See the FAQ entry titled “What kinds of op-amps are available?” for more information.

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