B.TECH - Semester 3 electronics devices and circuits Question Paper 2021 (oct)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- (a) Describe vollage divider bias configuration. What is the elfect of bypass capacilor on biasing?
- What is the effect of temperature on Q point of a transistor.
- Draw the circuil diagram of a RC coupled amplifier.
- Draw the circuil diagram of a Wren bridge oscillator.
- Diferentiale clipping and clamping circuits.
- Give the block diagram of a 555 IC .
- What is crossover distortion in power amplifiers?
- Explain clipping circuils using op-amp. 8 What is the significance of precision rectifiers.
- Explain the principle of laser diode.
- Describe channel lenglh modulation? $$ (10 \times 2=20 \text { Marks }) $$ Answer any one full queslions frem each Module. Each queslicn canies 20 marks.
- (b) Describe CE-CE cascade amplifier, What is the effect of cascading on amplifter bandwidth?
- (a) Differentiate vollage-series leedback and current-series feedback in amplifiers. Explain the advanlages of negaive feedback.
- (b) Explain the working of a Harley and Colpills oscillators. Oblain the expression for the frequency of oscillation.
- (a) Describe a differentiator using RC circuit. Give waveforms and obtain the oulput equalion.
- (b) How a posilive clamper circuil is oblained using a silicon diade. Give waveforms assuming a non-ideal diode. 14 (a) Explain the working of a shunl regulator with a neal diagram.
- (b) Explain the working of a astable multivibator using 555 lC with neat waveforms.
- (a) Explain the working of a class B pushpull amplifier 10
- (b) Explan different slages of inside circuil of an op-amp.
- (a) Describe Schmitt lrigger circuit wilh proper diagrams.
- (b) Describe second order aclive fillers with a neal diagram Module - IV
- (a) Explain the principle of TFT, ..... 8
- (b) Explain following ..... 12(i) Photolransistor (ii) Solar cell (iii) LCD OR 18 (a) Explain the principle of CMOS, ..... 10
- (b) Describe different types of MOSFETs? ..... 10 $$ (4 \times 20=80 \text { Marks }) $$