Design of two stage amplifier

Thread Starter

falade47

Joined Jan 24, 2017
178
Please i was asked to design a two stage amplifier with the following charaxteristics Av =4000, Zi=4.7kohm, Vcc=12v. .need help with this please..
 

BobTPH

Joined Jun 5, 2013
6,101
What are the constraints on the 2 stages? If they are unconstrained, use 2 op amps and it becomes pretty easy.

Bob
 

sghioto

Joined Dec 31, 2017
3,722
Wow a two stage transistor amp with a gain of 4000. Lets see, first stage with a gain of 40 followed by the second stage with a gain of 100 will work. Probably going to be a noisy SOG.
SG
 

Thread Starter

falade47

Joined Jan 24, 2017
178
Wow a two stage transistor amp with a gain of 4000. Lets see, first stage with a gain of 40 followed by the second stage with a gain of 100 will work. Probably going to be a noisy SOG.
SG
Can you help out with a schematic..?..
Thanks
 

dendad

Joined Feb 20, 2016
4,251
This sounds like homework.
You will get a lot more help if you post an attempt at the problem. Most of us are unwilling to do your work for you. You learn by doing, not by getting it done for you.
Have a go at it and post your efforts first. Then you may find some help.

And I note, you have at least doubled up on this post. One is sufficient.
 
Last edited:

bertus

Joined Apr 5, 2008
22,121
Hello,

As said the 4000 times can be reached using an 40 and 100 times stage.
Also an 50 and 80 times stages might work.

Bertus
 
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