| **.subckt tb_prescaler_23_pex_c |
| VSS vss GND {vss} |
| VDD vdd vss {vdd} |
| Vref CLK vss PULSE(0 {vin} 0 1p 1p {Tref/2} {Tref}) DC {vin} AC 0 |
| C2 clk_23 vss 10f m=1 |
| Vmc MC vss PULSE({vin} 0 0 1p 1p 400n 800n) DC {vin} AC 0 |
| x1 vdd clk_23 clk_2 nclk_2 vss MC net6 net5 net7 net8 prescaler_23_pex_c |
| x2 nclk_2 vss CLK vdd clk_2 net1 net2 net3 net4 div_by_2_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 ~/sky130-mpw2-fulgor/div_by_2/sch/simulations/div_by_2_pex_c.spice |
| .include ~/sky130-mpw2-fulgor/prescaler_23/sch/simulations/prescaler_23_pex_c.spice |
| |
| * Data to save |
| |
| .ic v(CLK) = 0.0 |
| .ic v(MC) = 0.0 |
| .ic v(clk_2) = 0.0 |
| .ic v(nclk_2) = 0.0 |
| .ic v(clk_23) = 0.0 |
| |
| * Simulation |
| .control |
| save v(MC) v(CLK) v(clk_2) v(nclk_2) v(clk_23) |
| tran 0.01ns 800ns |
| write tb_div_by_5_tran.raw |
| plot v(clk_23) v(clk) v(clk_2) v(MC)+3 v(clk_23)+6 v(clk_2)+9 v(clk)+12 |
| |
| .endc |
| |
| |
| |
| **** end user architecture code |
| **.ends |
| .GLOBAL GND |
| **** begin user architecture code |
| |
| **** end user architecture code |
| ** flattened .save nodes |
| .end |
