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    how to get clean waveform? how to avoid overshoot/undershoo

    Hello: Recently I made one socillator and one pulse generators, but all of them suffers from un-clean waveform. There are some clear overshoot/undershoot on some waveforms I get. I think I have added enough bypass capacitance on the circuit board. Especially to the pulse generator, it has a...
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    Why my simple BJT amplifier does not give me expected gain?

    simple bjt amplifier Hello: I wired a simple BJT common emitter amplifier, it is 2N2222A. The configuration is that a pair of resistor forms a voltage divider which bias the transistor at 1/3 of the supply voltage. I also put a small about 20 Ohm resistor on the emiter. Output is taken from...

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