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.

Devices

• Discrete Transistors
• Operational amplifiers
• Fairchild Error Amplifier Data

Applications

• Regulated power supply.
• D.C Power Amplifiers
• Measurement
  Measurement
  Measurement is the process or the result of determining the ratio of a physical quantity, such as a length, time, temperature etc., to a unit of measurement, such as the metre, second or degree Celsius...
  
   Equipment
• Servomechanisms

External links

• Error Amplifier Design and Application, alphascientific.com
• Error amplifier as an element in a voltage regulator
  Voltage regulator
  A voltage regulator is an electrical regulator designed to automatically maintain a constant voltage level. A voltage regulator may be a simple "feed-forward" design or may include negative feedback control loops. It may use an electromechanical mechanism, or electronic components...
  
  :
  Stability analysis of low-dropout linear regulators with a PMOS pass element

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