[SOLVED] Common-emitter amplifier

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mr.shocky

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For better understanding of BJT biasing read the book "Introductory Electronic Devices and Circuits 7th ed by Robert T Paynter".
 

Hi
I've a better suggestion here ! tell me , what section you're doubting with ?

Best Wishes
Goldsmith
 


You have started your calculation with an input resistance of 1.25kohms at the base. Why? Where originates this value from?
 

There are also obviously incorrect equations like

Rb1 = (12 - 4.7V)/20 µA = 36.5 K

The resulting resistance is actually 365 K, I can just guess that you have chosen one-tenth applying a popular design rule. But if so, you should tell.
 

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