Does this colpitts have a chance to work?

Thread Starter

mondo90

Joined May 16, 2025
132
Hi,

I stumbled upon Oscillators simplified book and I doubt some of it's schematics, for instance:
1794461644930.png

How is the energy in the LC tank circuit regenerated? I have even attempted to simulate it but no luck:
1794461737970.png

1794461747688.png

Green is output, white is base, blue is emitter resistor. Note I have added the emitter myself as the book circuit didn't even have it.
Beside that I noticed this book is slopy on formulas for instance:
1794461844803.png

Should rather be Vcc^2/2PO
 
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