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Old 15th October 2009, 12:02 PM   #1
Question BJT amplifier circuit

Hi i need to design a BJT amplifier circuit
and these are the specification i need to follow

The amplifier described in this specification should operate from a single 15-volt supply and have a small signal voltage gain of your choice between 10 dB and 20dB.

The amplifier uses voltage divider bias and has a load resistance of 10k-ohms.

I am thinking to build it on a vero board or a breadboard.
Thanks for your help
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Old 15th October 2009, 12:26 PM   #2
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Quote:
Originally Posted by Computer_Smart View Post
Hi i need to design a BJT amplifier circuit
and these are the specification i need to follow

The amplifier described in this specification should operate from a single 15-volt supply and have a small signal voltage gain of your choice between 10 dB and 20dB.

The amplifier uses voltage divider bias and has a load resistance of 10k-ohms.

I am thinking to build it on a vero board or a breadboard.
Thanks for your help
hi,
I'm not sure what you are asking for.?
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I will NOT answer PM's requesting technical help, please use the Forum
PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/
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Old 15th October 2009, 12:38 PM   #3
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Quote:
Originally Posted by ericgibbs View Post
hi,
I'm not sure what you are asking for.?
I have no idea how to design this. i need help on how i am going to design the BJT amplifier
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Old 15th October 2009, 12:45 PM   #4
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Quote:
Originally Posted by Computer_Smart View Post
I have no idea how to design this. i need help on how i am going to design the BJT amplifier
hi,
I see, OK.
May I ask if this is classwork.

Look thru this collection and post your design.

Transistor circuits, transistor as amplifiers, BJT, bipolar junction transistor, Miller effect
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Eric " Good enough is Perfect "
I will NOT answer PM's requesting technical help, please use the Forum
PIC tutorials: Nigel's www.winpicprog.co.uk/ Bill's: www.blueroomelectronics.com/

Last edited by ericgibbs; 15th October 2009 at 12:45 PM.
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Old 15th October 2009, 01:28 PM   #5
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You should give a few more details such as frequency range.There are a number of approaches for that.You may use 1/10 rule which assumes Ve=(1/10)*Vcc.Draw the dc equivalent of voltage divider bias.We have different models for different frequency ranges.You can find them in any of the electronics book.
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