For what applications are op-amps used?

An op-amp is an IC that amplifies the difference in voltage between two inputs. The desired circuit can be easily designed with a few external resistors. Also, when common-mode noise becomes a problem in noisy environments, the differential input of the op-amp can reject it. For this reason, it is often used in various sensors that are often used in IoT Devices, etc.

Connection between sensors and devices
Connection between sensors and devices

In the most basic circuit, op-amps are used as voltage amplifiers, which can be broadly divided into noninverting and inverting amplifiers. Voltage followers (also simply called buffers) are a type of commonly used noninverting amplifiers. Op-amps are also used as differential amplifiers, integrator circuits, etc.

Op-amps are widely used for various applications. It is no exaggeration to say that op-amps are found in almost all electrical appliances. For example, op-amps amplify analog signals from various sensors in IoT-connected home appliances and measuring instruments.

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