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Self on Audio, 2nd Edition
book

Self on Audio, 2nd Edition

by Douglas Self
June 2006
Beginner
488 pages
13h 2m
English
Newnes
Content preview from Self on Audio, 2nd Edition
17

Distortion in power amplifiers, Part II: the input stage

The input stage of an amplifier performs the critical duty of subtracting the feedback signal from the input, to generate the error signal that drives the output. It is almost invariably a differential transconductance stage; a voltage-difference input results in a current output that is essentially insensitive to the voltage at the output port. Its design is also frequently neglected, as it is assumed that the signals involved must be small, and that its linearity can therefore be taken lightly compared with that of the voltage amplifier stage (VAS) or the output stage. This is quite wrong, for a misconceived or even mildly wayward input stage can easily dominate HF distortion performance. ...

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Publisher Resources

ISBN: 9780750681667