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I am struck between the right method of biasing for BJT.I want to design a BJT power amplifier, i need maximum current at the output because of the low impedance of the load as well as adequate stability for my design.i want to know which is best between self bias and voltage divider network considering my needs for the system.

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Sounds like homework to me. – trygvis Nov 22 '12 at 13:54
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This question is way too broad in its current form. If you don't want it to be closed, fix the question to explain what you have tried and what exactly you are stuck on. We are not here just to do your homework for you. – Olin Lathrop Nov 22 '12 at 15:25
More info. What kind of power amplifier? RF? Audio? Is it going to be DC coupled to the load or AC coupled? Dual-voltage or single? Class A? B? AB? At least a partial schematic without the biasing part that is under deliberation ... – Kaz Nov 23 '12 at 22:06

closed as not a real question by Olin Lathrop, Nick Alexeev, Kaz, Dave Tweed, clabacchio♦ Nov 27 '12 at 17:25

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, see the FAQ.

1 Answer

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If what you need is a low output impedance, you need an emitter follower connection. Also, if you want to make sure your circuit is insensitive to beta, then you should do a voltage divider connection (a collector feedback would work too i guess)

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There are many ways to get low output impedance, so saying you need a emitter follower for that is just plain wrong. It is also not clear what you mean by "voltage divider connection". All around a poor answer. -1 – Olin Lathrop Nov 22 '12 at 19:41

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