|Aug2-12, 09:57 AM||#1|
Need help on class AB powe amp
I need to know how does it operate. The textbook that we got doesnt state clearly.
Can anyone guide me on how a class AB power amp work stage by stage ? Thanks in advance.
|Aug3-12, 12:22 AM||#2|
it's like a Class B push-pull amp (where one transistor is "off" whenever the other is "on"). but the Class B has a little problem of crossover distortion around zero (when both transistors are "off").
the Class AB biases the two push-pull so that they both are hanging on the threshold of "on" when the input signal is zero. this reduces crossover distortion.
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