Analog electronics
Previous year question paper with solutions for Analog electronics
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- Why is it not possible to use the h-parameters at high frequencies and large signals?
- What do you mean by cascade the amplifiers?
- Why does R-C coupling give constant gain over mid frequency range?
- Comment on the maximum efficiency of class-B amplifier operation.
- What is the effect of negative feedback on gain in an amplifier?
- The voltage gain of an amplifier without feedback is 60dB.It increases to 40dB with feedback. Calculate the feedback factor.
- Explain the basic principle of operation of RC oscillator.
- Why are L-C resonant circuits impractical at audio frequencies?
- Explain how Zener diode maintains constant voltage across the load.
- What are various types of distortion present in power amplifier? How do you graphically determine the second order harmonic distortion?
- State Barkhausen’s Criteria for Oscillation.
- What are the factors responsible for reduction in gain at high frequencies?
- Define noise figure for an amplifier.
- Write the principle of phase shift oscillator.
- Draw the output waveforms for class A, class B, class AB and class C of power amplifier.
- State what will happen to the voltage gain of an amplifier if the bypass capacitor is open circuited.
- Define the parameter fT and discuss its significance,
- Define Phase margin and Gain margin.
- Differentiate between voltage and power amplifier.
- What is an oscillator? How does it differ from an amplifier?
- Define harmonic distortion.
- What is the main advantage of using Transformer coupling over R-C coupling?
- Draw h-parameter equivalent circuit of CB configuration.
- Explain the principle of multistage amplifiers.
- Why is crystal oscillator used in radio transmitter?
- List all advantages of negative feedback in amplifier.
- What is the principle of operation of oscillators?
- Compare RC phase shift and crystal oscillator.