/diy/ - Do It Yourself

Anonymous Wed Oct 11 19:41:26 2017 No.1258856 [View]
File: 14 KB, 763x528, CEamp.png [View same] [iqdb] [saucenao] [google]

How do I go about designing a circuit to have a specific input/output impedance? Like if I had an amplifier that I wanted to have a 50Ω output?

Take this common emitter amplifier for instance, with an open circuit voltage gain of ~22 at 1kHz. We know we can calculate the output impedance of this circuit, it's Zout = Rc||RL and if RL is high impedance then it's effectively Zout = Rc which in this case would be 6kΩ.

How do I go about making this 50Ω output impedance (flat 50Ω from DC up to 1MHz or so) without significantly altering the gain, frequency response, or any other major properties of the amplifier?

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/diy/ - Do It Yourself

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