Electronics and Communication Engineering - Digital Electronics

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:

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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:

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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:

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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:

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45. 

In 8085 microprocessor, what is the memory address stored on the stack, when the program is interrupted?

A. 0210 H
B. 0.211 H
C. 0118 H
D. 020 FH

Answer: Option B

Explanation:

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