Noise Temperature

Q.  The noise temperature at a resistor depends upon
- Published on 15 Oct 15

a. Resistance value
b. Noise power
c. Both a and b
d. None of the above

ANSWER: Noise power
 
The noise temperature Tn of any white noise source is defined by
Tn = Pn/KB
Where Pn 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 Pn is delivered.
The equivalent noise temperature Tn in terms of noise figure may be defined as
Tn = T0 (F-1)
where F is the noise figure
T0 = 170C
= 290K

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