| **.subckt tb_freq_div_pex_c |
| VSS vss GND {vss} |
| VDD vdd vss {vdd} |
| Vref net9 vss PULSE(0 {vin} 0 1p 1p {Tref/2} {Tref}) DC {vin} AC 0 |
| VMC S1 vss PULSE(0 {vin} 0 1p 1p 400n 800n) DC {vin} AC 0 |
| x4 vdd net10 net9 vss inverter_min_x2_pex_c |
| x5 vdd CLK net10 vss inverter_min_x4_pex_c |
| VMC1 S0 vss PULSE(0 {vin} 0 1p 1p 200n 400n) DC {vin} AC 0 |
| VMC2 MC vss PULSE(0 {vin} 0 1p 1p 100n 200n) DC {vin} AC 0 |
| x1 s1n s0n S0 S1 MC clk_0 clk_pre vss vdd clk_out_mux21 clk_d n_clk_0 f_div clk_2 clk_5 clk_2_f |
| + nclk_2 clk_1 n_clk_1 freq_div_pex_c |
| x2 nclk_2 vss CLK vdd clk_2 net1 net2 net3 net4 div_by_2_pex_c |
| x3 vss vdd net7 net6 f_div net8 net5 PFD_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 |
| |
| .options TEMP = 100.0 |
| .options RSHUNT = 1e20 |
| .options GMIN = 1e-10 |
| |
| * 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/PFD_pex_c.spice |
| .include ~/caravel_analog_fulgor/xschem/simulations/freq_div_pex_c.spice |
| |
| * Data to save |
| .save all |
| .ic v(CLK) = 0.0 |
| .ic v(MC) = 0.0 |
| .ic v(clk_2) = 0.0 |
| .ic v(nclk_2) = 0.0 |
| .ic v(f_div) = 0.0 |
| .ic v(S0) = 0.0 |
| .ic v(S1) = 0.0 |
| .ic v(clk_0) = 0.0 |
| .ic v(n_clk_0) = 0.0 |
| .ic v(clk_1) = 0.0 |
| .ic v(n_clk_1) = 0.0 |
| .ic v(clk_pre) = 0.0 |
| .ic v(clk_5) = 0.0 |
| .ic v(clk_d) = 0.0 |
| .ic v(clk_2_f) = 0.0 |
| .ic v(s1n) = 0.0 |
| .ic v(s0n) = 0.0 |
| |
| * Simulation |
| .control |
| save v(CLK) v(clk_2) v(S1) v(S0) v(MC) v(clk_0) v(clk_1) v(clk_pre) v(clk_5) v(clk_d) v(clk_2_f) |
| + v(f_div) |
| tran 0.01ns 800ns |
| write tb_freq_div_tran.raw |
| plot v(CLK) v(clk_2)+2 v(S1)+4 v(S0)+6 v(MC)+8 v(clk_0)+10 v(clk_1)+12 v(clk_pre)+14 v(clk_5)+16 |
| + v(clk_d)+18 v(clk_2_f)+20 v(f_div)+22 |
| .endc |
| |
| |
| |
| **** end user architecture code |
| **.ends |
| .GLOBAL GND |
| **** begin user architecture code |
| |
| **** end user architecture code |
| ** flattened .save nodes |
| .end |
