Hello everyone.
I know what Colpitts oscillators are, and I've used them many times.
But I've never designed them from scratch.
So today I've been simulating (and building) Colpitts using BJT, in common emitter, common collector and common base.
They all oscillate. That's easy to do. So is getting the (more or less) right frequency.
But I get distorted outputs, mainly because transistors go into cutt-off or saturation, and I'm not able to solve it.
After two or three hours searching, reading, and some more time of trials, I finally decided to ask for help.
Could anyone help me see what am I doing wrong, why is this happening and how to solve it?
I just want to fully understand what I'm doing.
I've selected one of the oscillators (a common emitter one) and attached it.
Thank you!
I know what Colpitts oscillators are, and I've used them many times.
But I've never designed them from scratch.
So today I've been simulating (and building) Colpitts using BJT, in common emitter, common collector and common base.
They all oscillate. That's easy to do. So is getting the (more or less) right frequency.
But I get distorted outputs, mainly because transistors go into cutt-off or saturation, and I'm not able to solve it.
After two or three hours searching, reading, and some more time of trials, I finally decided to ask for help.
Could anyone help me see what am I doing wrong, why is this happening and how to solve it?
I just want to fully understand what I'm doing.
I've selected one of the oscillators (a common emitter one) and attached it.
Thank you!
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