Colpitts oscillator

197

04:28:35

From Wikipedia.
Would current flowing back into the voltage source like this damage it?

published 6 years ago

hurz

6 years ago

no, but it needs probably an extra capacitor in parallel to not use the mains as antenna

MattFerrie

6 years ago

What value of capacitor? Something like 10 uF?

hurz

6 years ago

depends on the oscillator frequency. The impedance must be low enough at this frequency. 10uF is mostlikely much to big. So speculate a colpitts runs at some MHz it should be big enough to use 10nF ceramic capacitor to short high frequrncies.

MattFerrie

6 years ago

How fast can this run in theory?

hurz

6 years ago

"fast"? I think with discreet componemts for L and C as resonator, the maximum frequency (fastness;-) is a little above 100MHz. Maybe 200MHz

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