BSIM4 4.8.2 MOSFET NQS model test

load "spice/bsim4v8.osdi"
load "resistor.osdi"

model nch sp_bsim4v8 type=1 cgso=0 cgdo=0 cgsl=0 cgdl=0 cf=0 cgbo=0

model v vsource
model r resistor

// Ramp gate voltage from -2 to 2 for 10s
vg1 (0 g1) v type="pulse" val0=2 val1=-2 delay=0m rise=10
vg2 (0 g2) v type="pulse" val0=2 val1=-2 delay=0m rise=10

m_qs  (0 g1 0 0) nch w=10.0u l=5.0u instance_trnqsmod=0
m_nqs (0 g2 0 0) nch w=10.0u l=5.0u instance_trnqsmod=1

control
  analysis op1 op
  analysis tran1 tran step=5m stop=10 maxstep=2m
  postprocess(PYTHON, "runme.py")
endc

embed "runme.py" <<<FILE
from rawfile import rawread
import numpy as np
import matplotlib.pyplot as plt
import sys

raw = rawread('tran1.raw')
plot = raw.get()

fig1 = plt.figure(figsize=(6,8), dpi=100)
fig1.suptitle('BSIM4 4.8.2 NQS test')
ax_dict = fig1.subplot_mosaic("""
A
B
""")

ax_dict["A"].set_title('Gate voltage')
ax_dict["A"].set_ylabel('Gate voltage [V]')
ax_dict["A"].set_xlabel('time [s]')
ax_dict["A"].plot(plot['time'], plot['g1'])

ax_dict["B"].set_title('Gate current')
ax_dict["B"].set_ylabel('Gate current [A]')
ax_dict["B"].set_xlabel('time [s]')
ax_dict["B"].plot(plot['time'], plot['vg1:flow(br)'], label="no NQS")
ax_dict["B"].plot(plot['time'], plot['vg2:flow(br)'], label="NQS")
ax_dict["B"].legend(loc='upper left')

fig1.tight_layout()

plt.show()
>>>FILE


