定性使用 BJT 三极管¶

ng.circ("""
  Vcc Vcc 0 10V
  Vin b 0 DC 5V SINE(5 3 1k)
  Q Vcc b e NPN
  Re e 0 1000
  .model NPN NPN(IS=5fA BF=200 VAF=140)
  .options savecurrents
  """)
print_op()

ng.cmd('tran 1u 3m')
Ic = -1000 * ng.vectors()['vcc#branch']
Ve = ng.vectors()['e']
Vin = ng.vectors()['b']
time = ng.vectors()['time'] * 1e3
plt.plot(time, Vin, label='Vin')
plt.plot(time, Ve, label='Vout')
plt.xlabel("time (ms)")
plt.ylabel("Vout (V)")
plt.legend()

ng.circ("""
  Vcc  Vcc 0     10V
  Vref b   0     5.7V
  Q    Vcc b  e  NPN
  Re   e   0     1000
  .model NPN NPN(IS=5fA BF=200 VAF=140)
  .options savecurrents
  """)
print_op()

ng.cmd('dc re 9 5000 1')
Re = ng.vector('res-sweep')
Vout = ng.vector('e')
fig,ax = plt.subplots()
plt.plot(Vout/Re, Vout, label='Vout')
plt.xlabel('Iout (A)')
plt.ylabel('Vout (V)')
plt.legend(loc='center')
ax2 = ax.twinx()
plt.plot(Vout/Re, 5.7 - Vout, 'orange', label='Vbe')
plt.ylabel('Vbe (V)')
plt.legend(loc='right')

ng.circ("""
  Vcc Vcc 0    4V
  Vee 0   Vee  4V
  Vin b   0    DC 0V SINE(0, 4, 1k)
  Q1  Vcc b    e  NPN
  Re  e   Vee  1000
  Rl  e   0    1000
  .model NPN NPN (IS=5fA BF=200 VAF=130)
  """)

ng.cmd('tran 10u 3m')
Vin = ng.vectors()['b']
Vout = ng.vectors()['e']
time = ng.vector('time')*1000
plt.plot(time, Vin, label='Vin')
plt.plot(time, Vout, label='Vout')

ng.circ("""
  V1 vcc 0      10V
  Q1 0   vin b  PNP
  Q2 vcc b   e  NPN
  R1 vcc b      10k
  R2 e   0      1k
  Vin vin 0 DC 5 SINE(5 3 1k)
  .model NPN NPN (IS=5fA BF=200 VAF=130)
  .model PNP PNP (IS=2fA BF=150 VAF=80)
  """)
print_op()
ng.cmd('tran 10u 3m')
Vin = ng.vectors()['vin']
Vb = ng.vectors()['b']
Vout = ng.vectors()['e']
time = ng.vector('time')*1000
plt.plot(time, Vin, label='Vin')
#plt.plot(time, Vb, label='Vb')
plt.plot(time, Vout, label='Vout')
plt.ylabel('Vout (V)')
plt.xlabel('time (ms)')
plt.legend()

plt.plot(Vin, 1e3*(Vout-Vin))
plt.xlabel('Vin (V)')
plt.ylabel('Vout - Vin (mV)')

ng.circ("""
  Vcc Vcc 0 5V
  Vee 0 Vee 5V
  Vin b 0 DC 0V SINE(0, 2, 1k)
  Q1 Vcc b e NPN
  Q2 Vee b e PNP
  R1 e 0 100
  .model NPN NPN(IS=2fA BF=200 VAF=130)
  .model PNP PNP(IS=5fA BF=80  VAF=50)
  """)
ng.cmd('op')
print(ng.vectors())
ng.cmd('tran 10u 2m')
Vin = ng.vectors()['b']
Vout = ng.vectors()['e']
time = ng.vector('time')*1000
plt.plot(time, Vin, label='Vin')
plt.plot(time, Vout, label='Vout')
plt.xlabel('time (ms)')
plt.legend()

ng.circ("""
  V1 Vin 0 dc 5 pulse(0 15 0 1 1)
  R1 Vin b 47k
  Q1 c b e NPN
  R2 e 0 56
  Q2 b e 0 NPN
  Rload Vin c 100
  .model NPN NPN(IS=2fA BF=200 VAF=130)
  """)
print_op()
ng.cmd('tran 1m 1')
Vb = ng.vectors()['b']
Ve = ng.vectors()['e']
Vin2 = ng.vectors()['vin']
Iload2 = -1000 * ng.vectors()['v1#branch']
fig, ax = plt.subplots()
plt.plot(Vin2, Iload2)
plt.xlabel("Vcc (V)")
plt.ylabel("I load (mA)")
print('range %.2f mA' % (Iload2[-1] - Iload2[0]))
ax2 = ax.twinx()
Vbe2 = Vb - Ve
# plt.plot(Vin2, Ve, 'orange', label='Vbe1')
plt.plot(Vin2, Vbe, 'orange', label='Vbe2')
plt.ylabel('Vbe (V)')
plt.legend()

fig, ax = plt.subplots()
start=int(4/15*1000)
plt.plot(Vin2[start:], Iload2[start:])
plt.xlabel("Vcc (V)")
plt.ylabel("I load (mA)")
print('range %.2f mA' % (Iload2[-1] - Iload2[0]))
ax2 = ax.twinx()
plt.plot(Vin2[start:], Vbe2[start:], 'orange', label='Vbe2')
plt.ylabel('Vbe (V)')
plt.legend(loc='lower right')

%%tikz -ct
\ctikzset{european resistors, diodes/fill=cyan!20, transistors/arrow pos=end, transistors/fill=cyan!20}
\draw (0, 0) node [npn, tr circle] (Q) {};
\draw (Q.C) to [R, l={$R_C$}, bipoles/length=1.2cm] ++(0, 2) node [vcc] {Vcc};
\draw (Q.C) to [short, *-o] ++ (0.7, 0) node [right] {Vout$-$};
\draw (Q.B) to [short, -o] ++ (-0.7, 0)  node[below]{Vin};
\draw (Q.E) to [R, l_={$R_E$}, bipoles/length=1.2cm] ++(0, -2) node[tlground]{}; 
\draw (Q.E) to [short, *-o] ++ (0.7, 0) node [right] {Vout+};

ng.circ("""
  Vcc Vcc 0 15V
  Q1 c b e npn
  Rc Vcc c 1k
  Re e 0 1k
  Vin b 0 DC 5 SINE(5 3 1k)
  .model npn npn(IS=2fA BF=200 VAF=130)
  """)
print_op()
ng.cmd('tran 1u 5m')
Vb = ng.vector('b')
Vc = ng.vector('c')
Ve = ng.vector('e')
time = ng.vector('time')
plt.plot(time, Vb, label='Vb')
plt.plot(time, Ve, label='Ve')
plt.plot(time, Vc, label='Vc')
plt.legend()