In [1]:

```
#given
fl =220*10**6
fm =224*10**6
IF1 = 10.7*10**6
IF = 1.5*10**6
#Calculation
IF2 =IF1+IF
tune_l =fl+IF1
tune_m = fm+IF1
IF1_imgl = tune_l+IF1
IF2_imgm = tune_m+IF1
#Result
print"(a) The local oscillatior tuning range is ",tune_l/10**6,"to ",tune_m/10**6,"Mhz"
print"(b) Frequency of the second local oscillator is ",IF2/10**6,"MHz"
print"(c) First IF image range is ",IF1_imgl/10**6,"MHz to ",IF2_imgm/10**6,"MHz"
```

In [1]:

```
#Given
R = 100*10**3
T = 273+25
B = 20*10**3
k = 1.38*10**-23
#Calculation
Vn=(4*k*T*B*R)**0.5
#Result
print"The noise voltage across 100k resistor is ",round(Vn*10**6,2),"microvolt"
```

In [2]:

```
#Given
R=75
B=6*10**6
T = 29+273
k =1.38*10**-23
#calculation
Vn = (4*k*T*B*R)**0.5
#Result
print"The input themal noise is ",round(Vn*10**6,2),"microvolt"
```

In [3]:

```
#Given
Tc=32.2
Tk=273+Tc
B =30*10**3
k =1.38*10**-23
#Calculation
Pn=k*Tk*B
#Result
print"The average noise power is ",round(Pn*10**16,2),"10**-16 W"
```

In [6]:

```
#Given
SN_ip = 8
SN_op = 6.0
#Calculation
NR = SN_ip/SN_op
NF = 10*log10(NR)
#Result
print"The noise factor is ",round(NR,2)
print"The noise figure is ",round(NF,2),"dB"
```

In [23]:

```
#Given
R= 75.0
T=31+273
k=1.38*10**-23
B=6*10**6
Vs = 8.3*10**-6
NF=2.8
#Calculation
import math
Vn = math.sqrt(4*k*T*B*R)
Pn = Vn**2/R
Ps = Vs**2/R
SN = (Ps*10**12)/(Pn/10.0**12)
SN_dB =10*log10(SN)
NR = 10**0.28
SN_op = SN/NR
Tn = 290*(NR-1)
#Result
print"(a) The input noise power is ",round(Pn*10**12,1),"pW"
print"(b) The input signal power is ",round(Ps*10**12,3),"pW"
print"(c) Signal to noise ratio in decibels ",round(SN/10**24,2)
print"(d) The noise factor is ",round(NR,2)
print"(e) Signal to noise ratio of the amplifier is ",round(SN_op/10**24,2)
print"(f) The noise temperature of the amplifier ",round(Tn,0),"K"
```