Electronics and Communication Engineering - Digital Electronics

21. 

Which one of the following is used to change data from spatial code to temporal code?

A. Shift register
B. Counter
C. A/D converters
D. Combinational circuits

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

22. 

Which of the following needs DC forward voltage to emit light?

A. LED
B. LCD
C. Both LED as well as LCD
D. None of the above

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

23. 

If a microcomputer has a 64 K memory; what is the hexadecimal notations for the last memory location?

A. 1111
B. 1A1A
C. EEEF
D. FFFF

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

24. 

In the given figure shows a 3 bit shift register using TTL flip flops. Initially all the flip flops are set to 0 state. After 8 clock pulses

A. A = 1, B = 1, C = 1
B. A = 1, B = 1, C = 0
C. A = 0, B = 1, C = 1
D. A = 0, B = 0, C = 1

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

25. 

Recommended fanout for ECL is

A. 5
B. 10
C. 15
D. 25

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.