Saturday, 5 March 2016

oscillator - Colpitts not oscillating as expected


I have tried to mount a Colpitts oscillator twice and its oscillation is not the expected. I get like 13 MHz oscillation when expected 50MHz using the following schematic:



Colpitts Oscillator used


When I change the Inductor value it doesn't appear to change. That's why I thought it could be an effect of the parasitic capacitances, as I'm using the following board to mount it: ´


Board used (don't really know the name of it)


Any thoughts?




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