I have a project at school,
I already read the previous post about small signal ampli but haven't seen what i'm looking for,hope you understand.
We need to make an amplifier using small signal input and using BJT for 2 stage,
We are the one to choose the Av, and I chose 23k because its a two stage. I searched in the internet for the signal output of a typical mp3 player or vcd player. So my input is Virms=300mV and Zi=100Ω,I guessed 100Ω is the Zi because from what I searched it says the impedance of the mp3 is 100Ω.
I used voltage divider,and here attached the diagram.
My questions are as follows:
1) I my Vi1 and Zi1 correct? and also what frequency to be used
2) I chose 2N2222A (here's the datasheet http://pdf1.alldatasheet.com/datasheet-pdf/view/50091/FAIRCHILD/2N2222A.html ), what Icq,B and Vceq to be used here?or atleast how to compute it or determine the correct parameter to use?.
3) For the Vcc,what should I consider to set my Vcc,but I was planning to use 12V(is it ok?).Also what to consider in choosing current source?
4) Is it right that I started in setting my Av?and my Av,is it alright that I chose 23k? and I'm trying to start from Ac analysis going to DC,is that right?
5) For Ce,Co and Ci , what is the proper computation for it? I already know the formula f= 1/(2∏RC), but I'm not really sure how to get it.
hope someone would help.
I already read the previous post about small signal ampli but haven't seen what i'm looking for,hope you understand.
We need to make an amplifier using small signal input and using BJT for 2 stage,
We are the one to choose the Av, and I chose 23k because its a two stage. I searched in the internet for the signal output of a typical mp3 player or vcd player. So my input is Virms=300mV and Zi=100Ω,I guessed 100Ω is the Zi because from what I searched it says the impedance of the mp3 is 100Ω.
I used voltage divider,and here attached the diagram.
My questions are as follows:
1) I my Vi1 and Zi1 correct? and also what frequency to be used
2) I chose 2N2222A (here's the datasheet http://pdf1.alldatasheet.com/datasheet-pdf/view/50091/FAIRCHILD/2N2222A.html ), what Icq,B and Vceq to be used here?or atleast how to compute it or determine the correct parameter to use?.
3) For the Vcc,what should I consider to set my Vcc,but I was planning to use 12V(is it ok?).Also what to consider in choosing current source?
4) Is it right that I started in setting my Av?and my Av,is it alright that I chose 23k? and I'm trying to start from Ac analysis going to DC,is that right?
5) For Ce,Co and Ci , what is the proper computation for it? I already know the formula f= 1/(2∏RC), but I'm not really sure how to get it.
hope someone would help.
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