**.subckt tb_top_pll_v1_pex_c
VSS vss GND {vss} 
VDD vdd vss {vdd} 
Vref A vss PULSE(0 {vin} 0 1p 1p {Tref/2} {Tref}) DC {vin} AC 0 
VD0 D0 vss {vd0} 
I0 net1 vss {iref} 
x1 iref_cp vss vdd vco_out vctrl Up QB nUp A out_to_pad Down nDown QA D0 lf_vc vco_buffer_out biasp
+ pswitch pfd_reset nswitch out_by_2 out_to_div out_by_5 n_out_by_2 div_5_nQ0 div_5_Q1_shift div_5_Q1
+ out_buffer_div_2 n_out_buffer_div_2 div_5_Q0 n_out_div_2 div_5_nQ2 out_div_2 out_to_buffer top_pll_v1_pex_c
x9 vdd net1 vss iref_cp net2 net3 net4 net5 net6 net7 net8 net9 net10 bias_pex_c
C1 out_to_pad vss 10p m=1
**** begin user architecture code


* Parameters
.param kp = 1.0
.param vdd = kp*1.8
.param vss = 0.0
.param vin = vdd
.param fref = 100e6
.param Tref = 1/fref
.param iref = 100u
.param vd0 = 0.0

.options TEMP = 100.0
.options RSHUNT = 1e20

* Models
.lib ~/skywater/skywater-pdk/libraries/sky130_fd_pr_ngspice/latest/models/corners/sky130.lib SF
.include ~/caravel_analog_fulgor/xschem/simulations/top_pll_v1_pex_c.spice
.include ~/caravel_analog_fulgor/xschem/simulations/bias_pex_c.spice

* Data to save

.ic v(A) = 0.0
.ic v(QA) = 0.0
.ic v(QB) = 0.0
.ic v(Up) = 0.0
.ic v(nUp) = 0.0
.ic v(Down) = 0.0
.ic v(nDown) = 0.0
.ic v(vctrl) = 0.0
.ic v(D0) = 0.0
.ic v(vco_out) = 0.0
.ic v(vco_buffer_out) = 0.0
.ic v(out_to_div) = 0.0
.ic v(out_to_pad) = 0.0
.ic v(out_div_2) = 0.0
.ic v(n_out_div_2) = 0.0
.ic v(out_buffer_div_2) = 0.0
.ic v(n_out_buffer_div_2) = 0.0
.ic v(out_by_2) = 0.0
.ic v(n_out_by_2) = 0.0
.ic v(div_5_Q0) = 0.0
.ic v(div_5_nQ0) = 0.0
.ic v(div_5_Q1) = 0.0
.ic v(div_5_Q1_shift) = 0.0
.ic v(div_5_nQ2) = 0.0
.ic v(out_by_5) = 0.0

* Simulation
.control
	tran 0.01ns 1.5us
	meas tran Tosc trig v(out_to_div) val=0.9 fall=1005 targ v(out_to_div) val=0.9 fall=1105
	let  T = Tosc/100.0
	let  f = 1/T
	echo .
	echo ------ PLL simulation ------
	print T f
	*write tb_PLL_tran.raw
	plot v(vctrl) v(pfd_reset)+2 v(nDown)+4 v(Down)+6 v(nUp)+8 v(Up)+10 v(QA)+12 v(QB)+12 v(A)+14
+ v(out_by_5)+16
 	plot v(out_to_pad)+12 v(out_to_buffer)+9 (out_to_div)+6 v(out_by_2)+3 v(out_by_5)
	plot v(out_by_5) v(out_by_2) v(out_to_div)
	plot v(vctrl)
	plot v(pswitch) v(nswitch) xlimit 1.4us 1.444us
.endc


**** end user architecture code
**.ends
.GLOBAL GND
** flattened .save nodes
.end