B.TECH - Semester 3 electronics circuits Question Paper 2020 (feb)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- 305 ELECTRONIC CIRCUITS - I (T) (2008 Scheme) Time : 3 Hours Max. Marks : 100 PART - A Answer all questions.
- What is the advantage of connecting an RC filter at the output of a diode rectifier circuit? Explain.
- What are the general characteristics of a diode clipper circuit?
- Define rise time. Give the relation between bandwidth and rise time.
- What are the benefits of $h$-parameters?
- Draw the small signal equivalent of CB configuration.
- What is a load line? Explain.
- Calculate the output resistance of a source follower circuit. Given that $\mathrm{R}_{\mathrm{s}}=0.75 \mathrm{k} \Omega, \mathrm{r}_{\mathrm{o}}=12.5 \mathrm{k} \Omega$ and $\mathrm{g}_{\mathrm{m}}=11.3 \mathrm{~mA} / \mathrm{V}$.
- Define unity gain bandwidth
- State and explain Miller's theorem.
- State the advantages of class A amplifiers. ( $\mathbf{1 0} \boldsymbol{\times} \mathbf{4} \boldsymbol{=} \mathbf{4 0}$ Marks) P.T.O. Answer any two questions from each module. Each question carries 10 Marks.
- Explain the response of high pass RC circuits to sine and square wave inputs.
- Derive the ripple factor for the following filters (a) C (b) LC.
- With a neat circuit diagram explain the working of transistor series feedback voltage regulator. How short circuit protection is incorporated in it?
- Derive the expression for stability factor of a BJT voltage divider bias circuit. Compare this configuration with biasing using two power supplies.
- How the BJT works a switch? Explain.
- Draw the circuit diagram of a Common Emitter amplifier with voltage divider bias. With the help of small-signal equivalent circuit, obtain the expression for its voltage gain, current gain, input and output impedance.
- Evaluate the expression for maximum conversion efficiency for a simple series fed Class A power amplifier. What are the drawbacks of transformer coupled power amplifiers?
- Explain the high frequency response of common emitter amplifier and derive the necessary equations to calculate the upper $3-\mathrm{dB}$ frequency.
- Analyse a common source MOSFET amplifier under high frequency. $$ \text { ( } 6 \times 10=60 \text { Marks) } $$