SPICE JFET level 2 amplifier

load "spice/jfet2.osdi"
load "resistor.osdi"
load "capacitor.osdi"

model v vsource
model r resistor
model c capacitor

subckt namp()
  model nf sp_jfet2 ( type=1 
    acgam=0.11 beta=0.3 cgd=200f cgs=820f delta=0.1 fc=0.3 
    hfeta=0.1 hfe1=0.05 hfe2=0.17 hfgam=0.09 hfg1=0.06 hfg2=0.01
    ibd=800p is=1.1p lfgam=0.03 lfg1=0.008 lfg2=0.0 mvst=0.04
    n=1.15 p=2.4 q=2.0 rs=0.7 rd=1 taud=10u taug=1m vbd=1.2 vbi=0.8
    vst=0.07 vto=-1.5 xc=0.2 xi=0.18 z=0.34 kf=1e-14 af=1
  )
  vdd (1 0) v dc=10
  rd (1 d) r r=1.4k
  j1 (d g s) nf $mfactor=2 area=3
  rs (s 0) r r=1k
  rg (g 0) r r=1M
  c1 (in g) c c=1u
  cblk (s 0) c c=100u
  vin (in 0) v dc=0 mag=1 type="sine" ampl=10m freq=1k 
ends

subckt pamp()
  model pf sp_jfet2 ( type=-1 
    acgam=0.11 beta=0.3 cgd=200f cgs=820f delta=0.1 fc=0.3 
    hfeta=0.1 hfe1=0.05 hfe2=0.17 hfgam=0.09 hfg1=0.06 hfg2=0.01
    ibd=800p is=1.1p lfgam=0.03 lfg1=0.008 lfg2=0.0 mvst=0.04
    n=1.15 p=2.4 q=2.0 rs=0.7 rd=1 taud=10u taug=1m vbd=1.2 vbi=0.8
    vst=0.07 vto=-1.5 xc=0.2 xi=0.18 z=0.34 kf=1e-14 af=1
  )
  vdd (1 0) v dc=10
  rd (0 d) r r=1.4k
  j1 (d g s) pf $mfactor=2 area=3
  rs (s 1) r r=1k
  rg (g 1) r r=1M
  c1 (in g) c c=1u
  cblk (s 1) c c=100u
  vin (in 0) v dc=0 mag=1 type="sine" ampl=10m freq=1k 
ends

control
  elaborate circuit("namp")
  clear saves
  save default p(j1,gm)
  analysis op1 op

  clear saves
  analysis tran1 tran step=0.01m stop=8m

  analysis ac1 ac from=0.1 to=100G mode="dec" points=50
  
  save full
  options smsig_debug=0
  analysis noise1 noise out=["d"] in="vin" from=1 to=100G mode="dec" points=50

  
  elaborate circuit("pamp")
  clear saves
  save default p(j1,gm)
  analysis op2 op

  clear saves
  analysis tran2 tran step=0.01m stop=8m

  analysis ac2 ac from=0.1 to=100G mode="dec" points=50
  
  save full
  analysis noise2 noise out=["d"] in="vin" from=1 to=100G mode="dec" points=50
  
  
  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('op1.raw')
plot = raw.get()
for name in plot.names:
    print(name, plot[name])

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

fig1 = plt.figure(figsize=(8,8), dpi=100)
fig1.suptitle('N-JFET level 2 amplifier')
ax_dict = fig1.subplot_mosaic("""
AC
BD
EE
""")

ax_dict["A"].set_title('Input')
ax_dict["A"].set_ylabel('Vin [V]')
ax_dict["A"].set_xlabel('time [ms]')
ax_dict["A"].plot(plot['time']*1e3, plot['in'])

ax_dict["B"].set_title('Output')
ax_dict["B"].set_ylabel('Vout [V]')
ax_dict["B"].set_xlabel('time [ms]')
ax_dict["B"].plot(plot['time']*1e3, plot['d'])

raw = rawread('ac1.raw')
plot = raw.get()
h = plot['d']

ax_dict["C"].set_title('Gain')
ax_dict["C"].set_ylabel('gain [dB]')
ax_dict["C"].set_xlabel('f [MHz]')
ax_dict["C"].semilogx(np.real(plot['frequency'])/1e6, 20*np.log10(np.abs(h)))

ax_dict["D"].set_title('Phase')
ax_dict["D"].set_ylabel('phase [deg]')
ax_dict["D"].set_xlabel('f [MHz]')
ax_dict["D"].semilogx(np.real(plot['frequency'])/1e6, 180/np.pi*np.unwrap(np.angle(h)))

raw = rawread('noise1.raw')
plot = raw.get()
print(plot.names)

ax_dict["E"].set_title('Output noise')
ax_dict["E"].set_ylabel('PSD [V^2/Hz]')
ax_dict["E"].set_xlabel('f [MHz]')
ax_dict["E"].loglog(plot['frequency']/1e6, plot['n(j1,flicker)'], label="J1,flicker")
ax_dict["E"].loglog(plot['frequency']/1e6, plot['n(j1,id)'], label="J1,Id")
ax_dict["E"].loglog(plot['frequency']/1e6, plot['n(j1,rs)'], label="J1,Rs")
ax_dict["E"].loglog(plot['frequency']/1e6, plot['n(j1,rd)'], label="J1,Rd")
ax_dict["E"].loglog(plot['frequency']/1e6, plot['n(j1)'], label="J1")
ax_dict["E"].legend(loc='upper right')

fig1.tight_layout()


raw = rawread('op2.raw')
plot = raw.get()
for name in plot.names:
    print(name, plot[name])

raw = rawread('tran2.raw')
plot = raw.get()

fig2 = plt.figure(figsize=(8,8), dpi=100)
fig2.suptitle('P-JFET level 2 amplifier')
ax_dict = fig2.subplot_mosaic("""
AC
BD
EE
""")

ax_dict["A"].set_title('Input')
ax_dict["A"].set_ylabel('Vin [V]')
ax_dict["A"].set_xlabel('time [ms]')
ax_dict["A"].plot(plot['time']*1e3, plot['in'])

ax_dict["B"].set_title('Output')
ax_dict["B"].set_ylabel('Vout [V]')
ax_dict["B"].set_xlabel('time [ms]')
ax_dict["B"].plot(plot['time']*1e3, plot['d'])

raw = rawread('ac2.raw')
plot = raw.get()
h = plot['d']

ax_dict["C"].set_title('Gain')
ax_dict["C"].set_ylabel('gain [dB]')
ax_dict["C"].set_xlabel('f [MHz]')
ax_dict["C"].semilogx(np.real(plot['frequency'])/1e6, 20*np.log10(np.abs(h)))

ax_dict["D"].set_title('Phase')
ax_dict["D"].set_ylabel('phase [deg]')
ax_dict["D"].set_xlabel('f [MHz]')
ax_dict["D"].semilogx(np.real(plot['frequency'])/1e6, 180/np.pi*np.unwrap(np.angle(h)))

raw = rawread('noise2.raw')
plot = raw.get()
print(plot.names)

ax_dict["E"].set_title('Output noise')
ax_dict["E"].set_ylabel('PSD [V^2/Hz]')
ax_dict["E"].set_xlabel('f [MHz]')
ax_dict["E"].loglog(plot['frequency']/1e6, plot['n(j1,flicker)'], label="J1,flicker")
ax_dict["E"].loglog(plot['frequency']/1e6, plot['n(j1,id)'], label="J1,Id")
ax_dict["E"].loglog(plot['frequency']/1e6, plot['n(j1,rs)'], label="J1,Rs")
ax_dict["E"].loglog(plot['frequency']/1e6, plot['n(j1,rd)'], label="J1,Rd")
ax_dict["E"].loglog(plot['frequency']/1e6, plot['n(j1)'], label="J1")
ax_dict["E"].legend(loc='upper right')

fig2.tight_layout()

plt.show()
>>>FILE


