Word forms: (regular plural) difference amplifiers
( Electrical engineering : Instrumentation, measuring, and testing )
The negative feedback into the difference amplifier allows the amplifier to compare the input to the actual output.
The operational amplifier is used as a difference amplifier, resulting in an output voltage equal to the difference of the latter two signals.
A difference amplifier is a device that amplifies the difference between two inputs, rejecting any signals
common to both.
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