| Electronics > Beginners |
| Transistor amplifier parasitic oscilation |
| (1/2) > >> |
| ovidiu231:
Hello,I'm new here. I got a big problem, I build a class A amp with 2n2222a, biass point consist of 2x 10k resistors, on colector I have 4.7k and on emitor 2.2k. When I inject the signal from my function generator i get this... Anyone have an ideea what is going on? |
| bob91343:
I can't read the voltage scale but I suspect you are overdriving it. |
| Circlotron:
Is there a coupling capacitor between your signal generator and the base of the transistor? A schematic diagram would help. |
| ovidiu231:
It's 1V/div |
| ovidiu231:
I tried with all kinds of caps. When I increase the amplitude, the bump increases too. |
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