Guru Nanak Dev University 2010-1st Year B.C.A Computer Application Principal of Digital Electronics , - Question Paper

(Theory)

Time Allowed : three Hours

Maximum Marks : 100

Note: Attempt any five ques. in all. All ques. carry equal marks.

1. Discuss different features of TTL, STTL and CMOS families and provide their transfer characteristics.[Marks 20]

2. (a) explain voltage divider biasing scheme.[Marks 10]

(b) discuss working of FETs.[Marks 10]

3. (a) Show that NAND gates are universal gates.[Marks 10]

(b) Design a half-adder using NAND gates only.[Marks 10]

4. discuss the working principle of any DAC converter.[Marks 20]

5. explain any microprocessor compatible ADC and its interfacing.[Marks 20]

6. explain 1 fault detecting and fault correcting code every.[Marks 20]

7. explain the address selection logic for a ROM chip. Draw learn and write control timing diagram. Compare PROM and EPROM.
[Marks 20]

8. explain the working and truth table of J-K flip-flop. provide its limitation and suggest any solution.[Marks 20]

Earning:   Approval pending.