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Complimentary Cross Quad CMOS Oscillator
* Predicted frequency is 5.61224e+08 Hz.
*
* PLOT i1
* Supply
vdd vdd gnd 1.2 pwl 0 1.2 1e-9 1.2
rdd vdd vdd_ana 70m
rgnd gnd gnd_ana 70m
* Cross quad
mpsx v_plus v_minus vdd_ana vdd_ana pch w=10u l=0.1u
mnsx v_plus v_minus gnd_ana gnd_ana nch w=10u l=0.1u
mpdx v_minus v_plus vdd_ana vdd_ana pch w=10u l=0.1u
mndx v_minus v_plus gnd_ana gnd_ana nch w=10u l=0.1u
* Lumped elements model of real inductor
ls v_plus i1 19.462n ic=0.06
rs i1 v_minus 7.789
cs v_plus v_minus 443f
coxs v_plus is 2.178p
coxd v_minus id 2.178p
rsis is gnd_ana 308
rsid id gnd_ana 308
csis is gnd_ana 51f
csid id gnd_ana 51f
* Parallel capacitor to determine leading resonance
cp v_plus v_minus 3.4p
.model nch nmos ( version=4.4 level=54 lmin=0.1u lmax=20u wmin=0.1u wmax=10u )
.model pch pmos ( version=4.4 level=54 lmin=0.1u lmax=20u wmin=0.1u wmax=10u )
*.tran 0.05n 1u uic
.pss 500e6 1u 1 1024 10 10 5e-3 uic
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