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operational transconductance amplifier (OTA)

An OTA amplifier is a type of operational amplifier, except that the OTA amplifier has an extremely high impedanceoutput

and behaves like a current source. An OTA amplifier converts the input voltage into an output current. This characteristic is equivalent to that of a transconductance. This is defined by the ratio of the output current to the input voltage.

OTA amplifiers are used in audio compression circuits and audio limiter circuits because they have a higher rate of change and thus significantly improve the compressor dynamics compared to voltage controlled amplifiers (VCA).

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Englisch: operational transconductance amplifier - OTA
Updated at: 27.05.2009
#Words: 101
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Translations: DE