Colpitts generator Pspice

[Arek462]

Hello!

I tried simulate Colpitts generator from Horowitz's book:



There isn't crystal in pspice student version so i replaced it with rlc circuit and also added 1G resistor because of the "floating point":



Howewer the waveforms doesn't look like i expected:




If any expert could help me, i will be very grateful.

Thank you!

 

[Alec_t]

C3 is 1000p in the schematic, but only 100p in the sim. Is that intentional?

 

[LvW]

The used FET needs a negative bias voltage VGS - hence, a small source resistor would help.
Mote than that - the crystal must be replaced by an inductance only.