Chapter 14 Thyristors

Example 14.1 Page No 342

In [2]:
# given data
V1=15.##  V
V2=1.##  V
R= 100.##  Ω
# The load current 
I= (V1-V2)/R##  A
I= I*10**3##  mA
print "The load current = %.2f mA"%I

The load current = 140.00 mA

Example 14.2 Page No 342

In [3]:
# given data
I= 4##  mA
I=I*10**-3##  A
V1=0.5## voltage across diode = %.2f V
R=100##  Ω
# The input voltage 
V= V1+I*R##  V
print "The input voltage = %.2f volts"%V

The input voltage = 0.90 volts

Example 14.6 Page No 351

In [8]:
# given data
Eta= 0.85#
V= 10.##  V
V1= Eta*V##  V
V= 20.##  V
R= 400.##  Ω
# The emitter current
I_E= V/R##  A
I_E= I_E*10**3##  mA
print "The emitter current = %.2f mA"%I_E

The emitter current = 50.00 mA

Example 14.7 Page No 351

In [9]:
# given data
V_E= 1##  V
R= 400##  Ω
I= 7*10**-3##  A
# The emitter supply voltage
V= V_E+I*R##  V
print "The emitter supply voltage = %.2f volts"%V

The emitter supply voltage = 3.80 volts