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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING SEMESTER I/II • EXAMINATION SUMMER- 2017
Subject Code: 320017 Date: 06 -06 -2017
Subject Name: Electronics devices and circuits-I
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Each question carry equal marks (14 marks)
Q.1

Explain Full-Wave rectifier and determine its Idc, Edc and Irms values
07


Idc, Edc ,Irms


Explain clamping circuits with waveform
07



Q.2

How P-N junction is formed? Draw and Explain characteristics of PN
junction diode
07


P-N


Explain Zener Diode with its characteristics
07



OR

Why filter circuit are necessary? List various filter circuits and explain
any one of them.
07



Q.3

Explain Seven Segment Display in detail
07





Explain two stages transformer coupled amplifier in details with necessary circuit and waveforms
07



OR
Q.3

Draw the circuit for CE, CB and CC transistor amplifiers and Compare all three configuration.
07


CE, CB CC


Define clipping circuits and explain Positive and Negative clipper with waveforms
07



Q.4

Draw CE amplifier circuit and explain its input output characteristics
07
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CE


Draw and Explain h-parameter model of CE amplifier.
07

CE

OR
Q.4

Which are the different transistor biasing methods? Explain voltage divider bias in detail.
07





Explain frequency response of R-C coupled amplifier
07

R-C

Q.5

Explain characteristics of Tunnel Diode in detail
07





What is UPS (uninterrupted power supply)? Why it is required? Explain in detail
07

UPS

OR
Q.5

Draw Explain Block diagram of SMPS
07


SMPS


Draw and explain regulated power supply circuit using voltage regulator chip 78XX in detail
07

78XX