E 08000CS207122001 Pages: 3

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Third Semester B.Tech Degree (S,FE) Examination January 2022 (2015 Scheme)

Course Code: CS207
Course Name: Electronic Devices & Circuits

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 3 marks. Marks
1 Describe the operation of biased clipper and combination clipper. (3)
2 Draw drain characteristics of JEET and explain how JFET works as VVR. (3)
3 Derive the condition for a good differentiator. (3)
4 What are the different types of MOSFET based on mode of operation. (3)
PART छ

Answer any two full questions, each carries 9 marks.
5 ല Design a loaded 5V Zener regulator for a load current of 50 mA. Input voltage is (4)
10 V 00. Assume that Zener knee current is 5 mA.
b) Design a low voltage regulator circuit using IC 723 to give an output voltage of (5)
SV.
6 9) Describe the operation of transistorized series voltage regulator and also define (5)
load regulation in a voltage regulator.
b) Draw ‏ع‎ explain a circuit to generate an output voltage ല്‌, Vo =3 Vin. (4)
7 9) A 1 KHz square wave is integrated using RC integrator first and then (4)
differentiated by RC differentiator. Draw the waveforms at
a) Output of Integrator
b) Output of differentiator.
b) Assuming voltage drop across the diode as 0.6V, Design a diode shunt clipper (5)

with transfer characteristics as shown in the following diagram.

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