Electronics > Beginners

power amp circuit

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Audioguru:
R11 provides negative feedback to the second transistor but not to the first transistor. My simulation shows the distorted result.
You have a tiny microphone input level and a high speaker output level so the gain of your amplifier is very high requiring not much negative feedback. For less distortion then the preamp transistor should have two transistors in a circuit with its own high gain and a lot of negative feedback.

NASK:
Many thanks again to above post. I have never experienced to calculate negative feedback transistor base circuit plz could I know where to find tutorial or ebook to desing this type of amps

Audioguru:
Go to Google and search for Transistor Negative Feedback.

NASK:
Now it is working with symmetrical!

Audioguru:
The sounds will be clearer without the distortion you had before.

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