Centre for Development of Advanced Computing(C-DAC) 2005 M.C.A Digital Electronics - Question Paper

END-TERM exam
Digital Electronics
FIRST SEMESTER [MCA] - DECEMBER 2005
Time: three Hours ( Maximum Marks: 60

Q. 1. (a) discuss AND, OR and NOT gate using diodes and transistor circuit.
(b) obtain the 16’ complement of AF3B
(c) Convert AF3B to binary.
(d) What is the largest binary number that can be expressed with 12 bits?
What is the equivalent decimal and hexadecimal?
(e) What is the exact number 6-bytes in a system that contain.
(i) 32K Bytes
(ii) 64 M Bytes
(iii) 6.4 G Bytes
Q. 2. (a) Simplify the subsequent Boolean function using 5 variable mps.
F(A, B, C, D, E) =
(0, 1, 4, 5, 16, 17, 21, 25, 29)
(b) Simplify the subsequent Boolean function in the product of sums :-
F (W, X, Y, Z) =
(0, 2, 5, 6, 8, 10)
Q. 3. (a) Design a 4-bit gray code to binary code converter.
(b) Design a 4-bit circuit incrementer using 4 half adder.
Q. 4. (a) Construct a 4-to-16-line decoder with 5 2-to-4-line decoder with enable.
(b) Design a BCD adder subtractor circuit.
Q. 5. (a) Design a 3-bit synchronous counter using D flip-flop.
(b) Design a serial 2’s complementer with a shaft register and a flip-flop. The
binary number is shifter out from 1 side and its 2’s complement shifted into
the other side of the shift register.
Q. 6. (a) discuss internal diagram of OP-Amp.
(b) Draw the architecture of 8085 microprocessor.
Paper Code: MCA-103 Subject: Digital Electronics
Note: Attempt any 5 ques.. All ques. carry equal marks.
Q. 7. (a) discuss R-2R DAC.
(b) discuss successive approximation ADC.
Q. 8. Write short note (any two) :-
(a) PLD
(b) PAI
(c) CAM

Earning:   Approval pending.