Electronics and Communication Engineering - Communication Systems - Discussion

Discussion Forum : Communication Systems - Section 7 (Q.No. 19)
19.
An amplifier operating over a frequency range of 18 to 20 MHz has 10 kΩ input resistance. At a temperature of 27° C, the noise voltage at input of amplifier is (Boltzman constant k = 1.38 x 10-23 J/K)
18.2 μV
182 μV
16.2 μV
162 μV
Answer: Option
Explanation:

Using Equation Va = (4 x 1.38 x 10-23 x 300 x 2 x 106 x 104)0.5 = 18.2 x 10-6 V.

Discussion:
1 comments Page 1 of 1.

Rajashekar said:   8 years ago
Hers, Va = (4RKTB)^0.5.

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