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Digital Electronics

Digital Electronics
An OR gate has 6 inputs. The number of input words in its truth table are

128
32
6
64

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Digital Electronics
The simplified block diagram of a 10-bit A/D converter of dual slope integrator type is shown in figure. The 10-bit counter at the output is clocked by a 1 Mhz clock. Assuming negligible timing overhead for the control logic, the maximum frequency of the analog signal that can be converted using this A/D converted is approximately .

  1 KHz.
 2 KHz.
 500 Hz.
 250 Hz.

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Digital Electronics
The codes in which each successive code word differs from the preceding one in only one bit position are called

 BCD codes
 cyclic codes
 self-complementing codes
 sequential codes

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Digital Electronics
Why small bubble is given on the output of the NAND gate symbol ?

 Output is inverted
None of these
 Open collector output
 Tristate

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Digital Electronics
An AND gate can be imagined as

 transistors connected in series
 transistors connected in paralle
 switches connected in parallel
 switches connected in series

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Digital Electronics
Positive integers must be represented by

 Both A and B
 None of these
 unsigned number
 signed numbers

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