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DFCCIL EE Digital Electronics Quiz 7

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Question 1

Which of the following are analog to digital converters?

1. Weighted resistor type

2. R–2R Ladder

3. Dual slope

4. Flash type

Question 2

For n-bit flash type A/D converter number of comparators used are

Question 3

Choose the correct option related to Schmitt trigger:

1) It can be used as square wave generator.

2) It is not used as a comparator.

Question 4

Each of the next four (4) items consists of two statements, one labelled as ‘Statement (I)’ and the other as ‘Statement (II)’. You are to examine these two statements carefully and select the answers to these items using the code given below:

Statement I : Digital systems process only codes consisting of 0’s and 1’s.

Statement II : Digital systems has bistable nature.

Codes:

A) Both Statements (I) and Statement (II) are individually true and Statement (II) is correct explanation of statement (I).

B) Both Statements (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of statement (I).

C) Statement (I) is true but statement (II) is false.

D) Statement (I) is false but statement (II) is true.

Question 5

The full-scale output of an ADC is 20 V. The resolution required to be 15 mV. What is the minimum no. of bits required?

Question 6

For a dual slope type. ADC what is the maximum time of conversion for 4-bits and clock cycle time is 2 nsec.
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