B.TECH - Semester 3 electronic circuits Question Paper 2021 (oct)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- Derive the condition for RC integrator circuit.
- Draw the circuil of a bilevel clipper. Sketch the outpul wavelorm for sine wave input.
- Draw the frequency response curve of an RC Coupled amplifier.
- What is body eifect?
- Draw the small signal equivalent clrcuit model of a MOSFET.
- Mention the advantages of Wien Bridge Oscillator
- Explain Barkhausen crilerion.
- Draw the frequency response curve of a tuned amplifier.
- Define ripple factor and compare the values for three rectifiers.
- Explain the principle of Zener diode as regulator. Answer any one questions from each module. Each full question carries 20 maiks.
- (a) Explain with ctrcuit diagram, Irans[er characlerislics and oulpul wave[orms working of
- (i) lop clipper (ii) Iop and baltom clipper,
- (b) Explain with figure how BJT can act as a switch,
- (a) Draw the small signal equivalent circuil of a CE amplifier and derive the expression for inpul resislance, outpul resislance, vollage gain and current даіл.
- (b) Explain the basic principle of clamping circuils.
- (a) Drow the small signal equivalent circuil of a CS ampliliar and derive the expression for input resistance, oulput resistance and vollage gain.12
- (b) Explain the do transfer characteristics MOS differential amplifiers,
- (a) Explain different biasing of MOSFETs amplifiers. ..... 10
- (b) The MOSFET in the given circuit has $\mathrm{V}_{\mathrm{T}}=1 \mathrm{~V} \mathrm{Kn}^{\prime}(\mathrm{W} / \mathrm{L})=1 \mathrm{mAN}$. Determine $\mathrm{I}_{\mathrm{D}}, \mathrm{V}_{\mathrm{D}}, \mathrm{g}_{\mathrm{N}}$ and voltage gain. .......
- (a) Explain with neal circuit dlagram a single stage luned amplifier. ..... 10
- (b) Explain the four negative feedback technologies with suilable ligures. Compare input resislance and oulpul resislance of them. ..... 10 OR
- (a) Draw and explain a wo-stage cascaded MOSFET amplifiers. ..... 8
- (b) Explain wilh neal circuit diagram the working of a Wien Bridge oscillalor. Derive expression for ils frequency of oscillation. ..... 12 Module - IV
- (a) With relevant sketches explain the working of boolstrap sweep Circuit. ..... 10
- (b) Explain shunt capacilor filler and derive the expression of ripple factor. ..... 10 OR
- (a) Explain with circuil diagram a series voltage regulator using Iransisiors. ..... 10
- (b) How power amplifiers are classilied. Compare their porformances. ..... 10