from math import log
# Calculate the frequency of the emmiter voltage waveform. Assume n=0.6
# Given data
Rt = 220*10**3# # Resistor Rt=220k Ohms
Ct = 0.1*10**-6# # Capacitor Ct=0.1u Farad
n = 0.6# # Constant
A = 1./(1-n)#
T = Rt*Ct*log(A)#
f = 1./T#
print 'The Frequency of the Emmiter Voltage Waveform = %0.2f Hertz'%f