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Code i 9E,E-24

II Semester Diploma

Examinationo ApriUMay -2016

-I

co

ELECTRONICS Time:3Hoursl

I Max. Marks : 100

(i) Section - I is compulsory. (ii) Answer any two full questions from each of the rernaining Sections - II,

g.

Note:

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Register Nutnber

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SECTION.I

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1. (a) Fill in the blanks (i) The electrons present in the outer most shell of an atom are called

(ii) *",*,rilff.lT;sitive

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:

resistors are called as

called-_.

(iv)

(a)

4.

ia

gates.

5

SECTION.II

Explain conductors, insulators and semiconductor in terms of energy band diagram.

5

What is doping ? Explain with figure, how N-t1pe semiconductor is formed. Explain VI characteristics of semiconductor diode.

5 f,

(a) O) (c)

Explain with circuit diagram how Zener diocie used as voltage regulator. Explain the working of NPN transistor. Define Alpha and Bela.

(a)

What is biasing

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3.

-

w

O) (c)

Binary coded decimal code for 749 is (v) NOR and NAND gates are called as List the difference between BJT and JFET.

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(b)

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(iii) The liberation of electrons from the matter under the influence of light is

O) (c)

in

transistor ? Explain three different types

6 5 4

of biasing in

transistor.

5

Explain the VI characteristic of UJT. Explain, how to identifr the leads of different types of transistors.

6 4

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6. (a) (b) (c)

How the field effect transistors are classified ? With neat diagram, explain the working of n-channel JFET. Write the advantages of MOSFET over JFET.

5

Define photo electric emission. With neat diagram, explain the consfiuction, working and characteristics ofphoto diode. E List the classification of IC's by scale of integration. 3 4 Subtract the following Hexadecimal numbers using 2's complirnent : (i) (74)rc- (2B)ro

(ii) 7. (a)

3 7

g. co m

(a) (b) (c)

III

(c7)ro- (lD)ro

Convert the following binary number into decimal, hexadecimal and octal number system. (l

l0l

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s.

SECTION -

1,fi2

I I 01.101)2

4

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(b) Define bit, nibble and byte. (c) (D Multiply(ll0l)2 with (ll0), (ii) Divide(llll0)2by(ll0),

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(a) O)

SECTION.IV

State commutative, associative and distribute taw of Boolean algebra.

Simplifu the following expression

:

9.

B=X +YZ+12+XX

4

State De Morgan's theorems applied to Boolean algebra.

5

With the logic symbol and tnrth table, explain the NOR gate and Ex-NOR gate. Explain how to simpliff the following Boolean expression using K-map.

6 6

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(c)

(ii)

I

di

(i) A=(x+$(X+Y)

(a) O)

w

y

w

w

(c)

10.

(a) (b)

(c)

= AEc + Age + aEe + ABC + ABe Define the following: Noise margin Propogation delay

(i) (ii)

family.

Write short note on MOS logic 5 Define 2 Explain with neat circuit diagram, hou, a switch can be interfaced with TTL and CMOS.

interfacing.

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