Download SGBAU BSc 2019 Summer 4th Sem Electronics Communication Electronics n 8085 Microprocessor Question Paper

Download SGBAU (Sant Gadge Baba Amravati university) BSc 2019 Summer (Bachelor of Science) 4th Sem Electronics Communication Electronics n 8085 Microprocessor Previous Question Paper

Time : Three Hours]
1.
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B.Sc. (Part?Il) Semester?IV Examination
4S : ELECTRONICS
(Communication Electronics and 8085 Microprocessor)
Note :? (1) All questions are compulsory.
(2) Draw neat diagrams wherever necessary.
(A) Fill in the blanks :?
(i) ROM stands for .
(ii) The width of address bus in 8085 is _ _
(iii) FM stands for __
(iv) PPM stands for W
(B) Choose correct alternative for the following :?
(i) AM is
(a) Frequencymodulus (b) FrequencyModulation
(c) Amplitude modulation (d) None
(ii) The width ofdata bus of 8085 is 7 ____ .
(a) 2 bits (b) 4 bits
(0) 8 bits (d) None
(iii) PWM stands for
(a) Pulse width modulation (b) Pulse code modulation
(c) Pulse correct code (d) None
(iv) There are _ _ . Flags of 8085.
(a) 3 (b) 3
(c) 5 (d) 9
(C) Write answer in one sentence :
(1) What is the function of SP (Stack Pointer) 7
(ii) What is OP?code ?
(iii) What is Modulation index '3
(iv) What is the function of address bus 7
EITHER
(A) Draw the block diagram of AM transmitter and explain the function of each block.
(13)
Explain the F M theory and frequency spectrum ol'F M wave.
?30?15297 1
AW?1726
[Maximum Marks 2 80
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(Contd.)

OR
(P) Draw the block diagram or s .1p3rhetemdync receiver : explain its block diagram. 6
(Q) State the needs oi?modulmion. 3
(R) What are the advantugm 01' AM 1? 3
EITHER
3. (A) Explain the working oleiD as: optical source. 43
(B) Explain different Iypcs (J?opticnl ?bers. 6
OR
(1?) Draw me block diagram of fiber optic communication sysmm ; explain function ofeach
block. 1"
(Q) Explain the Jointer and (f?oupicrs, 6
EITHER
4. (A) Explain PAM and PWM. (?
(B) State and explain FDW with ?1pr of suitable diagram. 6
0R
(P) What is multiplexing 2? Explui?i TDM. 6
(Q) What is PCM ?? Explain PCM used in digital communication. 6
EITHER
5. (A) Draw the block diagram of 8085 microprocessor and explain the function of:
(i) ALU (ii) SP iii ;) PC (5
(B) Explain one byte: mm b) 16 and three. b_\1e instructiuns with suitat le examplc. 0
OR
(P) Explain various status Fl 1gs u ith suitable diagram of 8085 microprocessori 6
(Q) Draw and explain liming diagram for .\ID\' rz. r2 instruction. ()
EITHER
6. (A) Explain the classi?cation 01? instruction sci 01?8085 microprocessor with examplc. 6
(B) What is ?owchart 7 Draw and explain various ?ow chart symbovs. 0
OR
(P) Draw the ?ow chart and ?vritc ALP for ?nding Of minimum of [Wu numbers. 6
(Q) Explain the stack and :tack rclatcd instructions with suitable exmr pic. 6
EITHER
7. (A) Draw thc block diagram 3f 8255 PP! and explain the working of each block. 6
(B) Explain the control word formai for [/0 mode of 8255 PP]. 6
OR
(P) Explain Synchronous and Asynchronous data transfer schemes. 6
(Q) Explain memory mapped 1/0 and 1/0 mapped 1/0 scheme. 6
YBC?ISEQ',? 2
375