Chapter 8:Signal Conditioning¶

Example:8.1,Page No:491¶

In :
import math

#variable declaration
v1    = 100;                                 #first stage voltage gain
v2    = 200;                                 #second stage voltage gain
v3    = 400;                                 #third stage voltage gain

#calculations
V1     = 20*math.log10(v1);                      #first stage voltage gain  in dB
V2     = 20*math.log10(v2);                      #second stage voltage gain in dB
V3     = 20*math.log10(v3);                      #third stage voltage gain in dB
V      = V1+V2+V3;                               #total voltage gain in dB

#result
print'total voltage gain = %d'%V,'dB';
total voltage gain = 138 dB

Example:8.2,Page No:491¶

In :
import math

#variable declaration
G   = 30;                                 #absolute  power gain
n   = 5;                                  #number of stages
G1  = 10;                                 #negative feedback gain in dB

#calculations
p1    = 10*math.log10(G);                  #power gain of first stage in dB
pt    = n*p1;                             #total power gain in dB
pr    = pt-G1;                            #resultant power gain with negative feedback in dB

#result
print'total power  gain %2.2f'%pt,'dB';
print'resultant power gain %2.2f'%pr,'dB';
total power  gain 73.86 dB
resultant power gain 63.86 dB