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Using proteus I designed this amplifier: CC-EC

But I got this result: V out

I don't know what is the problem in my design. I've been changing the values of the linking capacitors but didn't get any result.

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closed as unclear what you're asking by Dwayne Reid, RoyC, Finbarr, MCG, clabacchio Dec 11 '18 at 12:45

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • \$\begingroup\$ "But" does not make sense. You simulated something and got a result. You need to provide details what behavior you expected. \$\endgroup\$ – winny Dec 17 '18 at 8:56
  • \$\begingroup\$ Did the current answer really solve your problem? If not, you shouldn't just accept any first answer that arrives. \$\endgroup\$ – pipe Dec 17 '18 at 15:07
  • \$\begingroup\$ I just wanted to get a bigger signal amplitude as an output and a complete signal \$\endgroup\$ – user324780 Dec 17 '18 at 16:18
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The 1st stage collector output is a current sink driving a small pullup R shunted by CC load such that the cap attenuates the voltage gain above 1/RC. So you have a mismatch. Move the CC cap. to the emitter.

The 2nd stage emitter output is shorted the CE cap such that it attenuates the signal to a flat line. Remove CE.

1st look at R ratios for DC bias , then impedance ratios for AC gain then loading ratios between stages. Then look at large signal clipping and Power dissipation and make adjustments.

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