Chapter 6 : Radio Receivers

Example 6.1, page no 262

In [1]:
#Given
#Vm(t),Vc(t),Vmod(t)
fm=10e3#modulating freq
BW=2*fm# Bandwidth
fc=100*BW#Carrier freq
print'Carrier freq for the BW to be 1%% of fc is: %d kHz'%(fc/1000)

Carrier freq for the BW to be 1% of fc is: 2000 kHz

Example6.2, page no 262

In [2]:
#Given
fmax=1600e3
fmin=500e3
IF=465e3
#i
fo1max=fmax+IF
fo1min=fmin+IF
C1max_C1min=(fo1max/fo1min)**2
#ii
fo2max=fmax-IF
fo2min=fmin-IF
C2max_C2min=(fo2max/fo2min)**2
print 'a)\nTuning capacitor range is: %f\nb)\nTuning capacitor range is: %d'%(C1max_C1min,C2max_C2min)

a)
Tuning capacitor range is: 4.579156
b)
Tuning capacitor range is: 1051