| * Bipolar transistor I-V characteristic |
| .param TEMP=27 |
| |
| * Include SkyWater sky130 device models |
| .lib "../../../models/sky130.lib.spice" tt |
| .include "../../npn_05v5/sky130_fd_pr__npn_05v5__wafer.corner.spice" |
| |
| * Base bias |
| Rb 1 2 680 |
| X1 3 2 0 0 sky130_fd_pr__npn_11v0_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 1.8V |
| dc Vce 0 1.8 0.01 vbb 0 1.2 0.01 |
| wrdata sky130_fd_pr__npn_11v0_W1p00L1p00__iv.data -Vic#branch V(1) V(3) |
| |
| * 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_11v0_W1p00L1p00__beta.data beta V(2) V(3) |
| echo maximum beta |
| print maximum(beta) |
| quit |
| .endc |
| .end |
