Discrete Electronic Circuits : Question Paper May 2016 - Electronics Engineering (Semester 4)

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Discrete Electronic Circuits - May 2016

Electronics Engineering (Semester 4)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.

Solve any five

1(a) Identify the circuit and draw output waveform with proper voltage levels.

(4 marks) 1(b) Determine R_C and R_B for the following circuit. Assume VBE=0.7V

(4 marks) 1(c) Compare D-MOSFET and E-MOSFET Considering and Construction and characteristics(4 marks) 1(d) Explain working of Darlington connection and it's advantages.(4 marks) 1(e) State and explain Barkhausen Criteria.(4 marks) 1(f) Compare class A with Class AB power amplifier.(4 marks) 2(a) For the following circuit shown, find operating point and plot DC load line

(10 marks) 2(b) Determine A_v, Z_i and Z₀ for the following circuit.

(10 marks) 3(a) Derive expression for overall voltage gain Z_i and Z₀ for two stage (CS-CS) amplifier.(10 marks) 3(b) Explain advantages of negative feedback and suggest scheme for improving i/p and o/p impedance of amplifier with proper explanation.(10 marks) 4(a) Derive expression for Ad, AC and CMRR for dual i/p ' Balanced o/p differential amplifier.
(10 marks) 4(b) For the circuit shown, find Idq, V_GSQ, V_D and V_s

(10 marks) 5(a) Explain working of class -B power amplifier, Derive expression for efficiency.(10 marks) 5(b) Explain high frequency analysis of CS amplifier.(10 marks)

Write short notes on

6(a) Hartley Oscillator(5 marks) 6(b) Constant current Source in Differential amplifier.(5 marks) 6(c) Crossover distortion in class B(5 marks) 6(d) Comparison of common base and Common Emitter amplifier.(5 marks)

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