PART-A(AC):
SOME VIVA VOCE QUESTIONS FOR ANALOG COMMUNICATION(AC) LAB:
- What is low pass filter?
- How many types of filters are there?
- What is first order and second order low pass filter? Differentiate between these two.
- How a first order low pass filter converted into a second order type filter?
- What is gain of LPF?
- Why the graph of second order filter became constant and then decreasing?
- What is pass band and stop band for a low pass filter?
- What is active high pass filter? Explain.
- What is the difference between low pass and high pass filter?
- Explain the graph for a active high pass filter.
- Explain active band pass filters.
- How many types of band pass filters are there?
- What is quality factor, and what will be the quality factor for same?
- In active band pass filter at some particular frequencies the output remains same, why is it so?
- Explain active band rejector filter, and differentiate between active band pass and active band rejector filter.
- What is band elimination filter?
- What is figure of merit?
- What is twin-T notch filter? And why it is used in active notch filter?
- At some particular designed frequencies, the voltage reaches maximum value, explain about it.
- What is modulation? Why modulation is needed in communication channels?
- What is an amplifier, tell me something about error amplifier, phase detector, voltage controlled oscillator(VCO).
- What is demodulation? Where is it need?
- What is phase locked loop(PLL)?
- Define following- i) Lock range ii) Capture range iii) Pull-in time.
- What is collector modulation?
- Why IFT and AFT is to be used in this type of circuit?
- Give a design for modulation and demodulation of the collector modulation circuit.
- What is pulse amplitude modulation?
- What does sampling theorem states about PAM?
- With respect to input sine wave explain the output of PAM.
- Differentiate between pulse width modulation(PWM) and PAM?
- Give the advantage and disadvantages of both PWM and PAM.
- Explain all about pulse position modulation.
- Why PWM signal is used as an input for PPM circuits?
- Explain Frequency modulation, here which IC is used to produce the desired wave?
- What is frequency sweeping?
- Explain the graph obtained from a FM signal with respect to input signal for IC 8038.
- What is modulation index and transmission bandwidth?
- What is tuned amplifier? Define class C tuned amplifier.
- Why it is called “tuned amplifier”?
- What should be the performance obtained from class C tuned amplifier?
- Give the application of class C tuned amplifier.
- Why class C tuned amplifier is used in a transmitter or receiver, why not class A or class B, or class AB, D, E?
- Define the power for a class c tuned amplifier.
- What is conduction angle?
No comments:
Post a Comment