Error amplifier (electronics)
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File:Error-amplifier inner.svg
An error amplifier is an electronic component that amplifies the difference between its two inputs. If one input is a reference signal, this difference can be considered the error in the other.
The error amplifier is usually used with feedback loops owing to its self-correcting mechanism. A common application is 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.
Devices
- Discrete Transistors
- Operational amplifiers
Applications
- Regulated power supply
- D.C Power Amplifiers
- Measurement Equipment
- Servomechanisms
See also
External links
- [http://www.alphascientific.com/technotes/technote3.pdf Error Amplifier Design and Application] {{Webarchive|url=https://web.archive.org/web/20180328173441/http://www.alphascientific.com/technotes/technote3.pdf |date=28 March 2018 }}, [http://www.alphascientific.com/ alphascientific.com]. Originally accessed 27 April 2009, now 404. Try [https://web.archive.org/web/20081006222215/http://www.alphascientific.com/technotes/technote3.pdf https://web.archive.org/web/20081006222215/http://www.alphascientific.com/technotes/technote3.pdf]
- Error amplifier as an element in a voltage regulator:
[http://focus.ti.com.cn/cn/lit/an/slyt194/slyt194.pdf Stability analysis of low-dropout linear regulators with a PMOS pass element] {{Webarchive|url=https://web.archive.org/web/20110707022958/http://focus.ti.com.cn/cn/lit/an/slyt194/slyt194.pdf |date=7 July 2011 }}
Category:Electronic amplifiers
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