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 RC and RB 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 Av, Zi and Z0 for the following circuit. (10 marks) 3(a) Derive expression for overall voltage gain Zi 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, VGSQ, VD and Vs (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)