A Pierce Crystal Oscillator

** Circuit Description **

* 3.579545Mhz color burst, AT cut, parallel resonant, Q=25000,
.subckt colorburst_crystal 1 2
 l 1 11 0.0555779237 IC=1uA 
 cs 11 12 3.56169600e-014
 r 12 2 50
 cp 1 2 8.90424001e-012
.ends

** Main Circuit **
* power supplies
Vdd 1 0 DC +5V
* oscillator circuit
Mp 2 3 1 1 pmos_transistor L=5u W=200u
Mn 2 3 0 0 nmos_transistor L=5u W=100u
Rf 2 3 10Meg
R1 2 4 75k
Xtal 3 4 colorburst_crystal
C1 3 0 10pF IC=2.5V
C2 4 0 10pF IC=2.5V
* model statement
.model pmos_transistor PMOS (kp=10u Vto=-1V lambda=0.04)
.model nmos_transistor NMOS (kp=20u Vto=+1V lambda=0.04)
** Analysis Requests **
.options limpts=100000 itl5=0 opts numdgt=7
.width out=80
* use the DC bias point as the initial conditions for the oscillator
.TRAN 20ns 20ms 0.0199972 20ns UIC
.FOUR 3.579MegHz
** Output Requests **
.PRINT TRAN V(2)
.end