| * Bipolar transistor I-V characteristic | |
| .lib ../../../libraries/sky130_fd_pr/v0.20.1/models/sky130.lib.spice tt | |
| * Base bias | |
| Rb 1 2 680 | |
| X1 3 2 0 0 sky130_fd_pr__npn_05v5_W1p00L1p00 M=1 | |
| Rc 3 4 100 | |
| * DC source for current measure | |
| Vic 4 5 DC 0V | |
| Vbb 1 0 DC 0V | |
| Vce 5 0 DC 0V | |
| .control | |
| * Sweep Vce from 0 to 3.3V, Vbb from 0 to 2.0V | |
| dc Vce 0 3.3 0.02 Vbb 0.6 0.9 0.01 | |
| let beta = Vic#branch / Vbb#branch | |
| wrdata sky130_fd_pr__npn_05v5_W1p00L1p00_beta.data beta V(2) V(3) | |
| echo maximum beta | |
| print maximum(beta) | |
| quit | |
| .endc | |
| .end |