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problem 1: State the noise figure of an amplifier. Compute the overall noise figure of ‘n’ cascaded networks, having gains A1, A2……….An and individual noise figure source, F1, F2,……..Fn correspondingly.

problem 2: Describe in brief the terms noise figure and noise temperature.

problem 3: If F1 and F2 are the noise figures and G1 and G2 are available power gains of two amplifiers in cascaded, illustrate that the overall noise figure F is given by F = F1 + F2 -1/G

problem 4: State the noise figure of an amplifier. Compute the noise figure of a vacuum tube amplifier supposing appropriate parameter.

problem 5: Describe different kinds of noise in:

a) Junction diodes.
b) Junction transistors.

problem 6: describe an experimental setup for the measurement of noise figure showing that the noise figure F is independent of the network gain and input resistance.

problem 7: Describe the Sources of noise in semiconductors. Determine the noise figure of grounded base transistor amplifier.

problem 8: Illustrate that the noise figures of grounded cathode, grounded grid and grounded plate vacuum tube amplifiers are approximate the similar.

problem 9: prepare descriptive notes on the given:

a) Minimum noise network
b) External noise

problem 10: What are various types of non-man made noise which might arise in a communication system? Describe the origin and nature of each kind.

Electrical & Electronics, Engineering

• Category:- Electrical & Electronics
• Reference No.:- M97559

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