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Colpitt's Oscillator Circuit
* Colpitt is an harmonic oscillator (LC based) which use
* a capacitive partition of resonator to feed the single
* active device.
* Predicted frequency is about 3.30435e+06 Hz.
* Models:
.model qnl npn(level=1 bf=80 rb=100 ccs=2pf tf=0.3ns tr=6ns cje=3pf cjc=2pf va=50)
r1 1 0 1
q1 2 1 3 qnl
vcc 4 0 5
rl 4 2 750
c1 2 3 500p
c2 4 3 4500p
l1 4 2 5uH
re 3 6 4.65k
vee 6 0 dc -10 pwl 0 0 1e-9 -10
*.tran 30n 12u
.pss 3.1e6 500e-6 3 256 10 50 5e-3
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