'grid_linestyle': 'dotted',
'title': r'CE Amplifier Transient Response ' + flabel,
'xlabel': r'Time [s]',
'ylabel': r'Output Voltage [v]',
'legend_loc': 'upper left',
'add_legend': True,
'legend_title': None
}
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
ax2 = ax.twinx()
ax2.set_ylim(-15, 75)
ax2.set_ylabel('Input Voltage [V]')
ax.set_ylim( np.mean(vo) - ( 2.25 * ( np.mean(vo) - min(vo) )), \
np.mean(vo) + ( 1.5 * ( max(vo) - np.mean(vo) )))
vpp = si_format(max(vo) - min(vo), precision=2) + 'V'
ax.plot(t, vo, '-', color='red', \
label = r'$v_{out}, V_{p-p}=$' + vpp)
ax2.plot(t, eee51.scale_vec(vi, g51.milli), '-', \
label = r'$v_{in}$')
ax2.legend(loc='upper right')
eee51.label_plot(plt_cfg, fig, ax)
plt.savefig(output_tran_file)
# define the plot parameters
plt_cfg = {
'grid_linestyle': 'dotted',
'title': r'Common Emitter CM Bias DC Transfer Curve',
'xlabel': r'$v_{in}$ [mV]',
'ylabel': r'$v_{out}$ [V]',
'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)
ax.plot(eee51.scale_vec(vin, g51.milli), vout, '--', \
label = r'$v_{OUT}$')
ax2 = ax.twinx()
ax2.set_ylabel(r'$I_C$ [mA]')
ax2.plot(eee51.scale_vec(vin, g51.milli), eee51.scale_vec(ic1, g51.milli), \
':', color='orangered', label = r'$I_C$')
ax2.legend(loc='upper right')
eee51.add_vline_text(ax, 0, 0, r'$V_{BE}$ = ' + \
'{:.1f}mV'.format(vbe1_used/g51.milli))
eee51.add_hline_text(ax, vo_dc, -75, \
r'$V_{OUT}=$' + '{:.2f}V'.format(vo_dc))
# open the transfer characteristics data file and get the data
vbe = [] # declare list for vbe
ic = [] # declare a list for ic with vce = vce,sat = 0.2V
ic2 = [] # declare a list for ic with vce = 2.5V
ib2 = [] # declare a list for ib with vce = 2.5V
with open(cfg['transfer_data'], 'r') as f:
for line in f:
vbe.append(float(line.split()[0]))
ic.append(float(line.split()[1]))
ic2.append(float(line.split()[3]))
ib2.append(float(line.split()[5]))
# convert to mV and mA
ic_mA = eee51.scale_vec(ic, g51.milli)
vbe_mV = eee51.scale_vec(vbe, g51.milli)
bjt_beta = [a / b for a, b in zip(ic2, ib2)]
# bjt parameters from our dc characterization
bjt_Is = 6.924988420125876e-13
bjt_n = 1.2610858394025979
g51.update_bjt_VA(-15.550605626760145)
g51.update_bjt_vce(specs['vce'])
# calculate the vbe needed for vce = 2.5V
reqd_vbe = eee51.bjt_find_vbe(specs['ic'], specs['vce'], \
bjt_Is, bjt_n, g51.bjt_VA)
# generate the ic for the ideal bjt model
# define the plot parameters
plt_cfg = {
'grid_linestyle': 'dotted',
'title': r'Common Emitter CM Bias DC Transfer Curve',
'xlabel': r'$v_{in}$ [mV]',
'ylabel': r'$v_{out}$ [V]',
'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)
ax.plot(eee51.scale_vec(vin, g51.milli), vout, '--', \
label = r'$v_{OUT}$')
ax2 = ax.twinx()
ax2.set_ylabel(r'$I_C$ [mA]')
ax2.plot(eee51.scale_vec(vin, g51.milli), eee51.scale_vec(ic1, g51.milli), \
':', color='orangered', label = r'$I_C$')
ax2.legend(loc='upper right')
eee51.add_vline_text(ax, 0, 0, r'$V_{IN}$ = ' + \
'{:.1f}mV'.format(0))
eee51.add_vline_text(ax, 10, 0, r'$V_{IN}$ = ' + \
'{:.1f}mV'.format(10))
# define the plot parameters
plt_cfg = {
'grid_linestyle': 'dotted',
'title': 'BJT 2N2222A Output Characteristics (sim)',
'xlabel': r'$V_{CE}$ [V]',
'ylabel': r'$I_C$ [mA]',
'legend_loc': 'upper left',
'add_legend': False
}
# plot the output characteristics
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
for m, v in enumerate(vbe):
ax.plot(vce, eee51.scale_vec(ic[m], g51.milli), \
label = '{:.2f}V'.format(v))
eee51.add_vline_text(ax, 0.2, 1.3, r'$V_{CE,sat}$=' + '{:.1f}V'.format(0.2))
# reorder the legend entries for easier reading
handles, labels = ax.get_legend_handles_labels()
ax.legend(handles[::-1], labels[::-1], title='$V_{BE}$', bbox_to_anchor=(1, 1))
eee51.label_plot(plt_cfg, fig, ax)
plt.savefig('2N2222A_output.pdf')
# plot the output characteristics and curve-fitted lines to show VA
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
# plot the common mode characteristics
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
for cm_file, cm_label in zip(cm_files, cm_labels):
vcm = []
itail = []
vop = []
with open(cm_file, 'r') as f:
for line in f:
vcm.append(float(line.split()[0]))
itail.append(float(line.split()[1]))
vop.append(float(line.split()[3]))
ax.plot(vcm, eee51.scale_vec(itail, g51.milli), '-', \
label = cm_label)
eee51.add_vline_text(ax, vicmin, 0, r'$V_{ic,\min}$ = ' + \
'{:.3f}'.format(vicmin))
eee51.add_vline_text(ax, vicmax, 0, r'$V_{ic,\max}$ = ' + \
'{:.3f}'.format(vicmax))
eee51.label_plot(plt_cfg, fig, ax)
plt.savefig('diff_amp1_vcm_itail.png')
dm_files = [cfg['transfer_vic=1.2'], \
cfg['transfer_vic=1.8'], \
cfg['transfer_vic=2.4']]
vic_values = [1.2, 1.8, 2.4]
# define the plot parameters
plt_cfg = {
'grid_linestyle': 'dotted',
'title': r'Common Emitter Amplifier DC Transient Response',
'xlabel': r'Time [ms]',
'ylabel': r'Voltage [V]',
'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)
ax.plot(eee51.scale_vec(t, g51.milli), vin, '-', \
label = r'$v_{IN}$ = ' + '{:.2f} '.format(vinpp/g51.milli) + r'$mV_{p-p}$')
ax.plot(eee51.scale_vec(t, g51.milli), vout, '-', \
label = r'$v_{OUT}$ = ' + '{:.2f} '.format(voutpp) + r'$V_{p-p}$')
ax.set_ylim(0, 5)
eee51.add_hline_text(ax, 682.7e-3, 0, \
r'$V_{IN}=$' + '{:.2f}mV'.format(682.7))
eee51.add_hline_text(ax, 2.58, 0, \
r'$V_{OUT}=$' + '{:.2f}V'.format(2.58))
ax.text(3.1, 4.5, r'$a_v=\frac{V_{OUT,p-p}}{V_{IN,p-p}}=$' + \
'{:.2f}'.format(voutpp/vinpp))
indexn, vin_simn = eee51.find_in_data(vid, -100e-6)
# define the plot parameters
plt_cfg = {
'grid_linestyle': 'dotted',
'title': r'3-Stage Op-Amp DC Transfer Curve',
'xlabel': r'$v_{id}$ [$\mu$V]',
'ylabel': r'Voltage [V]',
'legend_loc': 'lower left',
'add_legend': True,
'legend_title': None
}
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
ax.plot(eee51.scale_vec(vid, g51.micro), vo1, '-', \
label = r'$v_{o1}$')
ax.plot(eee51.scale_vec(vid, g51.micro), vo2, '-', \
label = r'$v_{o2}$')
ax.plot(eee51.scale_vec(vid, g51.micro), vo3, '-', \
label = r'$v_{o3}$')
eee51.add_vline_text(ax, 0, 0, \
'{:.2f}V'.format(0))
eee51.add_hline_text(ax, vo1[index], -750, \
r'{:.3f}V'.format(vo1[index]))
eee51.add_hline_text(ax, vo2[index], -750, \
r'{:.3f}V'.format(vo2[index]))
eee51.add_hline_text(ax, vo3[index], -750, \
r'{:.3f}V'.format(vo3[index]))
# define the plot parameters
plt_cfg = {
'grid_linestyle': 'dotted',
'title': 'BJT 2N2222A Output Characteristics (sim)',
'xlabel': r'$V_{CE}$ [V]',
'ylabel': r'$I_C$ [mA]',
'legend_loc': 'upper left',
'add_legend': False
}
# plot the output characteristics
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
for m, v in enumerate(vbe):
ax.plot(vce, eee51.scale_vec(ic[m], g51.milli), \
label = '{:.2f}V'.format(v))
eee51.add_vline_text(ax, 0.2, 1.3, r'$V_{CE,sat}$=' + '{:.1f}V'.format(0.2))
# reorder the legend entries for easier reading
handles, labels = ax.get_legend_handles_labels()
ax.legend(handles[::-1], labels[::-1], title='$V_{BE}$', bbox_to_anchor=(1, 1))
eee51.label_plot(plt_cfg, fig, ax)
plt.savefig('2N2222A_output.png')
# plot the output characteristics and curve-fitted lines to show VA
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
# to get the rest of the BJT parameters, let's use the transfer characteristics
# open the transfer characteristics data file and get the data
vbe = [] # declare list for vbe
ic2 = [] # declare a list for ic with vce = 2.5V
# we'll use this to check our model
ib2 = [] # declare a list for the base currents at vce = 2.5V
with open(cfg['transfer_data'], 'r') as f:
for line in f:
vbe.append(float(line.split()[0]))
ic2.append(float(line.split()[3]))
ib2.append(float(line.split()[5]))
# convert to mV
vbe_mV = eee51.scale_vec(vbe, g51.milli)
# plot the transistor dc beta
g51.update_bjt_VA(-15.550605626760145)
bjt_n = 1.2610858394025979
bjt_Is = 6.924988420125876e-13
# calculate the vbe needed for vce = 2.5V
reqd_vbe = eee51.bjt_find_vbe(specs['ic'], specs['vce'], \
bjt_Is, bjt_n, g51.bjt_VA)
bjt_beta = [a / b for a, b in zip(ic2, ib2)]
index, vbe_sim = eee51.find_in_data(vbe, reqd_vbe)
plt_cfg = {