An error amplifier is most commonly encountered in feedback unidirectional voltage control circuits, where the sampled output voltage of the circuit under control, is fed back and compared to a stable reference voltage. Any difference between the two generates a compensating error voltage which tends to move the output voltage towards the design specification. An error amplifier is essentially what its name says, that is, it amplifies an error signal. This error is based on the difference between a reference signal and the input signal. It can also be treated as the difference between the two inputs. These are usually used in unison with feedback loops, owing to their self-correcting mechanism. They have an inverting and a non-inverting input pin set, which is what is responsible for the output to be the difference of the inputs.

Devices

*Discrete

Transistors upright=1.4, gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (pink). A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch e ...

Operational amplifiers An operational amplifier (often op amp or opamp) is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. In this configuration, an op amp produces an output potential (relative to c ...

Applications

Regulated power supply A regulated power supply is an embedded circuit; it converts unregulated AC (Alternating Current) into a constant DC. With the help of a rectifier it converts AC supply into DC. Its function is to supply a stable voltage (or less often current), to ...

. *D.C Power Amplifiers *

Measurement Measurement is the quantification of attributes of an object or event, which can be used to compare with other objects or events. In other words, measurement is a process of determining how large or small a physical quantity is as compared ...

Equipment *

Servomechanisms In control engineering a servomechanism, usually shortened to servo, is an automatic device that uses error-sensing negative feedback to correct the action of a mechanism. On displacement-controlled applications, it usually includes a built-in ...

External links

Error Amplifier Design and Application

alphascientific.com
Originally accessed 27 April 2009, now 404. Tr
https://web.archive.org/web/20081006222215/http://www.alphascientific.com/technotes/technote3.pdf
* Error amplifier as an element in a

voltage regulator A voltage regulator is a system designed to automatically maintain a constant voltage. A voltage regulator may use a simple feed-forward design or may include negative feedback. It may use an electromechanical mechanism, or electronic components ...

:Stability analysis of low-dropout linear regulators with a PMOS pass element
Electronic amplifiers {{electronics-stub

Devices

Applications

See also

External links