Chapter 12: Transistors

Example 4, page no. 157

from __future__ import division
import math
#initializing  the  variables:
Ia  =  0.040;#  in  Amperes
I  =  50;#  in  Amperes
Rl  =  1.2;#  in  Kohms
Vc  =  7; # in Volts
R = 1; # in Kohms
Ib = 50*1E-6; # in Amps
Iic = 20*1E-6; #in Amps

#calculation:
Vi = (70 - 30)*1E-6 * 1000
Vo = 3.6
Av = Vo/Vi

Io = 3*1E-3
Ii = (70 - 30)*1E-6
Ai = Io/Ii

Ap = Av*Ai

#Results
print  "\n\n  Result  \n\n"
print  "\n  voltage gain, Av  =  ",  round(Av,2)
print  "\n  Current gain, Av  =  ",  round(Ai,2)
print  "\n  Power gain, Av  =  ",  round(Ap,2)

  Result  



  voltage gain, Av  =   90.0

  Current gain, Av  =   75.0

  Power gain, Av  =   6750.0