Noise Temperature

The noise temperature at a resistor depends upon

Options:

a) Resistance value
b) Noise power
c) Resistance value and noise power,both
d) None of the above

Correct Answer: b) Noise power

Explanation :

The noise temperature T_n of any white noise source is defined by
T_n= P_n/KB
Where P_n is the noise power
K = 1.381×10^-23 J/K, joules per Kelvin, the Boltzmann constant
B is the bandwidth at which the power P_n is delivered.
The equivalent noise temperature T_n in terms of noise figure may be defined as
T_n= T₀ (F-1)
where F is the noise figure
T₀ =170C
= 290K