r'$V_{OUT}=$' + '{:.2f}V'.format(vo_dc))
eee51.add_hline_text(ax2, ic1[index]/g51.milli, 50, \
r'$I_C=$' + '{:.2f}mA'.format(ic1[index]/g51.milli))
eee51.label_plot(plt_cfg, fig, ax)
plt.savefig('amp_ce_cm_transfer2.png')
# get the gain via the slope of the transfer curve
gain_ss = np.diff(vout) / np.diff(vin)
ro1_calc = abs(npn_2n3904['VA']) / ic1[index]
ro2_calc = abs(pnp_2n3906['VA']) / ic1[index]
gm1_calc = ic1[index] / (npn_2n3904['n'] * g51.VT)
gain_calc = -gm1_calc * eee51.r_parallel([ro1_calc, ro2_calc])
# define the plot parameters
plt_cfg = {
'grid_linestyle': 'dotted',
'title': r'Common Emitter Amplifier Small Signal Gain',
'xlabel': r'$v_{in}$ [mV]',
'ylabel': r'Gain $A_v = \frac{\partial v_{out}}{\partial v_{in}}$',
'legend_loc': 'upper left',
'add_legend': True,
'legend_title': None
}
# plot the amplifier transfer characteristics
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
eee51.add_vline_text(ax, 0, 0, r'$V_{BE}$ = ' + \
'{:.1f}mV'.format(reqd_vbe/g51.milli))
eee51.add_hline_text(ax, vo_dc, -75, \
r'$V_{OUT}=$' + '{:.2f}V'.format(vo_dc))
eee51.label_plot(plt_cfg, fig, ax)
plt.savefig('2N2222A_ce_transfer.png')
# get the gain via the slope of the transfer curve
gain_ss = np.diff(vout) / np.diff(vin)
ro_calc = abs(g51.bjt_VA) / ic[index]
gm_calc = ic[index] / (bjt_n * g51.VT)
gain_calc = -gm_calc * eee51.r_parallel([Rc, ro_calc])
# define the plot parameters
plt_cfg = {
'grid_linestyle': 'dotted',
'title': r'Common Emitter Amplifier Small Signal Gain',
'xlabel': r'$v_{in}$ [mV]',
'ylabel': r'Gain $A_v = \frac{\partial v_{out}}{\partial v_{in}}$',
'legend_loc': 'upper left',
'add_legend': True,
'legend_title': None
}
# plot the amplifier transfer characteristics
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
r'$I_{C1}=$' + '{:.3f}mA'.format(ic1[index]/g51.milli), \
verticalalignment='top')
eee51.label_plot(plt_cfg, fig, ax)
plt.savefig('amp_2stage_transfer.png')
# get the gain via the slope of the transfer curve
gain_ss = np.diff(vout)/np.diff(vin)
ro1_calc = abs(npn_2n3904['VA']) / ic1[index]
ro2_calc = abs(pnp_2n3906['VA']) / ic1[index]
gm1_calc = ic1[index]/(npn_2n3904['n'] * g51.VT)
gain1_calc = -gm1_calc * eee51.r_parallel([ro1_calc, ro2_calc])
gm5_calc = ic5[index]/(npn_2n3904['n'] * g51.VT)
ro5_calc = abs(npn_2n3904['VA']) / ic5[index]
ro6_calc = abs(pnp_2n3906['VA']) / ic5[index]
gain2_calc = -gm5_calc * eee51.r_parallel([ro5_calc, ro6_calc])
gain_2stage = gain1_calc * gain2_calc
# define the plot parameters
plt_cfg = {
'grid_linestyle' : 'dotted',
'title' : r'Common Emitter Amplifier Small Signal Gain',
'xlabel' : r'$v_{in}$ [$\mu$V]',
'ylabel' : r'Gain $A_v = \frac{\partial v_{out}}{\partial v_{in}}$',
'{:.1f}'.format(0.0))
eee51.label_plot(plt_cfg, fig, ax)
plt.savefig('diff_amp1_transfer_sim.png')
gain_values = [[], [], []]
for vod_value, gain_value in zip(vod_values, gain_values):
# get the gain via the slope of the transfer curve
gain_ss = np.diff(vod_value) / np.diff(vid)
gain_value.append(gain_ss)
gm1 = specs['ic1'] / g51.VT
ro1 = abs(npn_2n3904['VA']) / specs['ic1']
RL = 1.5e3
gain_calc = -gm1 * eee51.r_parallel([ro1, RL])
index, val = eee51.find_in_data(vid, 0)
# define the plot parameters
plt_cfg = {
'grid_linestyle': 'dotted',
'title': r'Small Signal Differential Gain',
'xlabel': r'$V_{id}$ [mV]',
'ylabel': r'Gain $A_{dm} = \frac{\partial v_{od}}{\partial v_{id}}$',
'legend_loc': 'upper right',
'add_legend': True,
'legend_title': None
}
# plot the amplifier transfer characteristics
Vce6 = Vx - Ic6 * Re6
Vbe6 = eee51.bjt_find_vbe(Ic6, Vce6, \
npn_2n3904['Is'], npn_2n3904['n'], npn_2n3904['VA'])
Ic8 = 2 * Ic6 / npn_2n3904['beta_1mA']
Vbe8 = eee51.bjt_find_vbe(Ic8, Vcc - Vbe6 - (Re6 * Ic6), \
npn_2n3904['Is'], npn_2n3904['n'], npn_2n3904['VA'])
Vc7 = Vbe8 + Vbe6 + (Re6 * Ic6)
Rmdiff = (Vcc - Vc7) / Ic6
gm1d = Ic1 / (g51.VT * npn_2n3904['n'])
ro2d = abs(npn_2n3904['VA']) / Ic1
ro4d = abs(pnp_2n3906['VA']) / Ic1
adm = gm1d * eee51.r_parallel([ro2d, ro4d])
Rod = eee51.r_parallel([ro2d, ro4d])
# CE amplifier bias
def f2(Re1, Ic1, Vo1, Vcc, bjt):
Vbe1 = eee51.bjt_find_vbe(Ic1, Vcc - (Re1 * Ic1) - (Vcc/2), \
bjt['Is'], bjt['n'], bjt['VA'])
Re = (Vcc - (Vo1 + Vbe1)) / Ic1
return Re - Re1
Ic1 = 1e-3
f2_args = (Ic1, Vo1, Vcc, pnp_2n3906)