xschem/simulations/tb_div_by_2_pex_c.spice

**.subckt tb_div_by_2_pex_c
VSS vss GND {vss} 
VDD vdd vss {vdd} 
x1 nout vss A vdd out net9 net10 net11 net12 div_by_2_pex_c
Vref net2 vss PULSE(0 {vin} 0 1p 1p {Tref/2} {Tref}) DC {vin} AC 0 
x3 vdd net3 net2 vss inverter_min_x2_pex_c
x4 vdd A net3 vss inverter_min_x4_pex_c
x2 vdd net1 out vss nout net4 net5 net7 net8 net6 div_by_5_pex_c
**** begin user architecture code



* Parameters
.param kp = 1.0
.param vdd = kp*1.8
.param vss = 0.0
.param vin = vdd
.param fref = 1e9
.param Tref = 1/fref
.param C = 1f
.param iref=100u

.options TEMP = 100.0
.options RSHUNT = 1e20

* Models
.lib ~/skywater/skywater-pdk/libraries/sky130_fd_pr_ngspice/latest/models/corners/sky130.lib SS
.include ~/caravel_analog_fulgor/xschem/simulations/inverter_min_x2_pex_c.spice
.include ~/caravel_analog_fulgor/xschem/simulations/inverter_min_x4_pex_c.spice
.include ~/caravel_analog_fulgor/xschem/simulations/div_by_2_pex_c.spice
.include ~/caravel_analog_fulgor/xschem/simulations/div_by_5_pex_c.spice

* Data to save
.save all

.ic v(A) = 0.0
.ic v(x2.q0) = 0.0
.ic v(x2.nq0) = 0.0
.ic v(x2.q1) = 0.0
.ic v(x2.nq1) = 0.0
.ic v(x2.q1_shift) = 0.0
.ic v(x2.nq1_shift) = 0.0
.ic v(x2.q2) = 0.0
.ic v(x2.nq2) = 0.0
.ic v(x2.x1.a) = 0.0
.ic v(x2.x1.na) = 0.0
.ic v(x2.x1.D_d) = 0.0
.ic v(x2.x1.nD_d) = 0.0
.ic v(out) = 0.0
.ic v(nout) = 0.0

* Simulation
.control
	tran 0.01ns 200ns
	*meas tran Tosc trig v(out) val=0.9 fall=5 targ v(out) val=0.9 fall=15
	*meas tran Td1  trig v(out) val=0.9 fall=5 targ v(out1) val=0.9 rise=6
	*meas tran Td2  trig v(out1) val=0.9 fall=5 targ v(out2) val=0.9 rise=6
	*meas tran Td3  trig v(out2) val=0.9 fall=5 targ v(out) val=0.9 rise=5
	*let  T = Tosc/10.0
	*let  f = 1/T
	*let Td = 1/(2*3*f)
	*print T f Td
	write tb_div_by_2_tran.raw
	plot v(out) v(A) v(nout)+2 v(A)+2
.endc



**** end user architecture code
**.ends
.GLOBAL GND
**** begin user architecture code

**** end user architecture code
** flattened .save nodes
.end