Today I have learned something; I've heard of Renard but this article goes way deeper.

 

Hello,
Finally i calculated these values for R1 & R2 & Rc & RE...

Now the problem i am getting is that my calculated values and measured values is not the same..
Here is my circuit :



Using Beta = 110 as on the datasheet :
and also using approximate analysis..
My calculated values are as follows:

Vb=1.597V
Vce= 5.13V
Ic~=IE=0.897mA
Vc=6.03V
Ib=8.08 micro.Amps
Input inpedance = 4791.96 Ohms
Output impedance = 5000 Ohms
Vo=4.44V

Can anyone check my circuit and let me know if its in good working condition?

Thanks in advance...

 

well niceboy sorry to say this but you have done some errors in your calculation:

First of all you have calculated the the dc op point vb not the one with the i/p signal.
I/p impedance is correct, s far as the o/p impedance is 5k(you are correct)


you high pass filter has F3db=3.325hz

the simulator which ever you have used is fairly accurate but i would advise you to use ltspice very helpful to understand all the details.

here are some of the values that i cal dc op point not simulated it yet.

vb=1.5969(you are correct)

ve=? for ve taking vbe=.6 then Ve=Vb-Vbe=.996v(simulator is nearly correct)

Ic=(dont know how to get the similiar symbol)Ie=Ve/Re=.996Amps(simulator is nearly correct)

Vc=Vcc-IcRc=5.04v(you have connected Vc incorrectly in your figure)

Gain=Rc/Re=10

so approximating the o/p voltage i think
your o/p voltage is a bit high but you have hugely overcalculated in your Vo calculations.

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I just cant come up with a good one!

 

An output impedance of 5k is too high to drive a 10k load, it'll be fine to drive 100k though, if you want to drive a 10k load the output impedance should be 1k maximum but I'd recommend even lower.

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I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong.

Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.

 

Where is the fault plz?

 

The output impedance of the transistor amplifier is 10k and it has a 10k load which cuts its output in half.

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Uncle $crooge

 

then what would be the best output impedance plz? so that i can work out the transistors.
thx

 

I've just told you.

__________________

I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong.

Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.