Part - || [EDC] CS207 ELECTRONICS DEVICES AND CIRCUITS KTU B TECH QUESTIONS FOR SECOND YEAR [S3] STUDENTS | QUESTION BANK


APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

[EDC] CS207 ELECTRONICS DEVICES AND CIRCUITS KTU B TECH QUESTIONS FOR SECOND YEAR [S3] STUDENTS | QUESTION BANK,electronics devices and circuits edc ktu questions,electronics devices and circuits edc  ktu,electronics devices and circuits edc  questions,electronics devices and circuits edc questions,electronics devices and circuits edc  questions ktu,ktu electronics devices and circuits edc  questions,electronics devices and circuits edc  questions,electronics devices and circuits edc  questions ktu,ktu electronics devices and circuits edc  questions,ktu CS questions,Cs questions,Computer Science questions
ELECTRONICS DEVICES AND CIRCUITS
 QUESTION PAPERS

PART D 

(Answer any 2 questions)

12. Draw the circuit of a two stage RC coupled CE amplifier and sketch its frequency response. 

What factors affect the gain of the amplifier at low frequencies and at high frequencies. 

Discuss the effect of cascading on the bandwidth. 

13. Draw the circuit diagram and explain the principle of operation of the following oscillators 

a. Wien bridge oscillator (4.5) 

b. any one LC oscillators (4.5) 

14. (A)Differentiate between positive and negative feedback.

List any 3 characteristics’ of an amplifier which is modified by negative feedback. (3) 

(B)Draw the circuit diagram of an astable multivibrator. (2) 

(C)Justify that it is a two stage RC coulpled amplifier using feedback.How does it generate Square wave. (4) 

PART E 

(Answer any 4 questions)

15.Define the following parameters of op-amp 

i. CMRR (3) 

ii. Input offset voltage (2) 

iii. Slew rate (3) 

iv. The two input bias currents of an Op-amp are 22µA and 26 µA. What is the value Of input offset current? (2) 

16. (A) Draw op-amp based circuit for following operation 


Vo = - (V1+V2+V3)/3. 

Also state the Value of input resistor if RF=3KΩ (4) 

(B) Draw the output waveform for a sine wave of 1v peak at 100 Hz applied to the Differentiator using op-amp (3) 

(C) Draw the op-amp based circuit diagram to provide following operation Vo =5V and Vin= -1V (3) 

17. (A) What is meant by hysteresis in Schmitt trigger? (2) 

(B) Design a OP-Amp circuit to give an output V0=V1-2V2+2V3-3V4 (8) 

18. (A) Determine the output pulse width of the mono-stable amplifier using 555 timer if R=10 KΩ and C=0.1 µF (4) 

 (B) Design a low pass filter with a cut off frequency of 4 kHz and with a pass band gain Of 2. (6) 

19. Design and draw the wave forms of 1KHZ square wave form generator using 555 Timer for duty cycle 

i) D=25% 

ii) D=50% (10) 

19. With neat diagram, explain the working principle of 

(a) R-2R ladder type DAC (5)

(b) Weighted resistor DAC (5)

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