| * MiM capacitor value test | |
| * Include SkyWater sky130 device models | |
| .lib ../../../libraries/sky130_fd_pr/v0.20.1/models/sky130.lib.spice tt | |
| .param freq = 1Meg | |
| .csparam freq = {freq} | |
| * Resistor bridge with capacitance | |
| V1 N2 0 1.8 | |
| IAC N3 N4 dc 0 ac 1 | |
| X1 N3 N4 sky130_fd_pr__cap_mim_m3_1 W=1 L=1 MF=1 | |
| * C34 N3 N4 50E-15 | |
| R1 N3 0 1.1Meg | |
| R2 N4 0 1.2Meg | |
| R3 N2 N3 1.3Meg | |
| R4 N2 N4 1.4Meg | |
| .ac lin 1 {freq} {freq} | |
| .control | |
| run | |
| echo capacitance | |
| print imag(1/v(N4,N3))/2/PI/freq | |
| quit | |
| .endc | |
| .end |