hamsiii
Member level 2

Hi all, I am new here and I am in need of help.
I have a project to design a BJT differential amplifier that provides a 20dB gain at the output. The circuit has a single supply (12Vdc) and the input is about 10-50mV and not differential. (Input is just a voice signal coming from the antenna)
I did some analysis but I thought they might not be correct, as output should be 100mVpp at 0Vdc. Can you help me how to DC and AC analyse this amp?
Thank you.
edit: Q3 and Q4 (with R5, R15,R16) part is for current mirror that generates 0.4-0.5mA for the diff. amp part
I have a project to design a BJT differential amplifier that provides a 20dB gain at the output. The circuit has a single supply (12Vdc) and the input is about 10-50mV and not differential. (Input is just a voice signal coming from the antenna)
I did some analysis but I thought they might not be correct, as output should be 100mVpp at 0Vdc. Can you help me how to DC and AC analyse this amp?
Thank you.
edit: Q3 and Q4 (with R5, R15,R16) part is for current mirror that generates 0.4-0.5mA for the diff. amp part
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