Exam Details
| Subject | Rf Circuits | |
| Paper | ||
| Exam / Course | Diploma In Electronics And Communication Engineering (DECVI)/ Advanced Level Certificate Course In Electronics And Communication Engineering (ACEVI)/ | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 3 IBIELE-004I
B.Tech. -VIEP -ELECTRONICS AND
COMMUNICATION ENGINEERING <BTECVI)
Term-End Examination
December, 2016
BIELE-004 RF CIRCUITS
nrl
Time: 3 hours Maximum Marks: 70
Note: Attempt any Beven questions. All questions carry equal marks. Missing data may be suitably assumed.
1. Explain the characteristics of passive IC components at RF frequencies.
What is the use of transmission lines in RF frequencies? 2x5=10
2. Derive the expression for input impedance of a transmission line. Also derive the expression for short and open circuit transmission line parameters.
3. Derive an expression for the Noise Figure using a two-port network.
Briefly explain the noise models that exist for active and passive components at RF frequencies. 2x5=10
4. Give the electrical equivalent circuit representation of the following and explain the significance of the terms appearing in the equivalent circuit 2x5=10
High frequency capacitor
High frequency wire wound resistor
5. What are the various topologies of Low Noise Amplifier Explain each of them briefly.
Explain the linearity and large signal performance of LNA. 2x5=10
6. Prove that the general expression for the amplifier efficiency in terms of conduction angle is
n=80-sin cos sin
What are the design parameters for high frequency amplifier design Explain in brief 2x5=10
7. What is a negative resistance oscillator? Describe its working principle. 5
Differentiate between an oscillator and a synthesizer. 3
What is the condition of oscillation of a circuit? 2
8. What is the use of mixer Design a multiplier-based mixer circuit and explain its working principle.
What is the difference between sub-sampling mixers and diode-ring mixers? 2x5=10
9. Define RF power amplifiers and explain the operation of anyone power amplifier with required expressions.
Explain the linearity considerations of RF power amplifiers. 3
Briefly explain the two-port stability
criterion. 2
10. Write short notes on any two of the following: 2 x 5=10
Resonators
Neutralization and Unilateralization
S-parameters
fT Doubler
B.Tech. -VIEP -ELECTRONICS AND
COMMUNICATION ENGINEERING <BTECVI)
Term-End Examination
December, 2016
BIELE-004 RF CIRCUITS
nrl
Time: 3 hours Maximum Marks: 70
Note: Attempt any Beven questions. All questions carry equal marks. Missing data may be suitably assumed.
1. Explain the characteristics of passive IC components at RF frequencies.
What is the use of transmission lines in RF frequencies? 2x5=10
2. Derive the expression for input impedance of a transmission line. Also derive the expression for short and open circuit transmission line parameters.
3. Derive an expression for the Noise Figure using a two-port network.
Briefly explain the noise models that exist for active and passive components at RF frequencies. 2x5=10
4. Give the electrical equivalent circuit representation of the following and explain the significance of the terms appearing in the equivalent circuit 2x5=10
High frequency capacitor
High frequency wire wound resistor
5. What are the various topologies of Low Noise Amplifier Explain each of them briefly.
Explain the linearity and large signal performance of LNA. 2x5=10
6. Prove that the general expression for the amplifier efficiency in terms of conduction angle is
n=80-sin cos sin
What are the design parameters for high frequency amplifier design Explain in brief 2x5=10
7. What is a negative resistance oscillator? Describe its working principle. 5
Differentiate between an oscillator and a synthesizer. 3
What is the condition of oscillation of a circuit? 2
8. What is the use of mixer Design a multiplier-based mixer circuit and explain its working principle.
What is the difference between sub-sampling mixers and diode-ring mixers? 2x5=10
9. Define RF power amplifiers and explain the operation of anyone power amplifier with required expressions.
Explain the linearity considerations of RF power amplifiers. 3
Briefly explain the two-port stability
criterion. 2
10. Write short notes on any two of the following: 2 x 5=10
Resonators
Neutralization and Unilateralization
S-parameters
fT Doubler
Other Question Papers
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Subjects
- Advance Microprocessor And Architecture
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- Modeling And Testing Of Digital Systems
- Multirate Systems
- Nano - Electronics
- Optical Fiber Communication
- Opto Electronics Communication Systems
- Power Electronics
- Principles of Communication Engineering
- Quantum Communication
- Rf Circuits
- Satellite And Tv Engineering
- Signal Compression
- Signals And Systems
- Technical English
- Television Engineering
- Wireless Communication