I am trying to analyse this amplifier circuit and I can not understand what the purpose of the 3 capacitors C1, C2 and C3 are if anyone could explain that would be much appreciated.
Thanks in advance.
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The capacitors on the output are to remove any DC from the signal and provide some high-pass filtering.
C1, is a feedback capacitor and it can reduce the phase shift in the feedback that can be caused by the input capacitance and series resistance from the signal. It can add some stability to the amp.