Electronics and Communication Engineering - Digital Electronics
Exercise :: Digital Electronics - Section 16
| 41. |
Assertion (A): CMOS devices have very low power consumption Reason (R): CMOS devices have high noise margin. |
| A. |
Both A and R are correct and R is correct explanation of A | | B. |
Both A and R are correct but R is not correct explanation of A | | C. |
A is true, R is false | | D. |
A is false, R is true |
Answer: Option B
Explanation:
|
| 42. |
Which is known as flash converter? |
| A. |
Weighted resistor D/A converter | | B. |
Parallel A/D converter | | C. |
Stair step A/D converter | | D. |
Up-down counter type A/D converter |
Answer: Option B
Explanation:
|
| 43. |
In a sequential circuit the output at any instant depends on |
| A. |
present inputs only | | B. |
past inputs only | | C. |
past outputs only | | D. |
past output and present input |
Answer: Option D
Explanation:
|
| 44. |
Point out the wrong statement, Sequential logic circuit is |
| A. |
one that requires a clock to change states | | B. |
one in which past affects the present states | | C. |
one whose outputs changes immediately when the inputs change | | D. |
also called clock logic or synchronous logic |
Answer: Option C
Explanation:
|
| 45. |
In 8085 microprocessor, what is the memory address stored on the stack, when the program is interrupted?
 |
Answer: Option B
Explanation:
|
