Electronics and Communication Engineering - Communication Systems - Discussion
Discussion Forum : Communication Systems - Section 2 (Q.No. 2)
2.
Which of the following types of noise assumes greater importance at high frequencies?
Answer: Option
Explanation:
At high frequencies time period of wave and transit time become comparable.
Discussion:
2 comments Page 1 of 1.
Ankit said:
7 years ago
If the time taken by the electrons to travel from emitter to collector in a transistor becomes comparable to the period of the signal being amplified, that is, at frequencies above VHF and beyond, the transit-time effect takes place and noise input impedance of the transistor decreases. From the frequency at which this effect becomes significant, it increases with frequency and quickly dominates other sources of noise.
Kesava said:
5 years ago
Very good explanation thank you @Ankit.
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