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Digital Electronics

Digital Electronics
Which of the following logic circuits is the fastest ?

 RTL.
 DTL.
 All have same speed.
 TTL.

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Digital Electronics
A self-complementing code for the decimal digits is created using the weight 4 4 3 -2. The value of 8592 in the code is

 1100 1001 1111 1000
 1000 0101 1001 0010
 1100 1011 1111 1001
 1100 0111 1111 0011

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Digital Electronics
In flip flop clock is present but in latch clock is

  none.
  may be present/absent.
  absent always.
  present always.

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Digital Electronics
Which of the logical operations is represented by the + sign in Boolean algebra ?

 NOT
 OR
 NAND
 AND

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Digital Electronics
NAND. gates are preferred over others because these

can be used to make any gate
consume least electronic power
provide maximum density in a chip.
have lower fabrication area

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Digital Electronics
To get an excess-3 code from BCD code

 0110 is subtracted
 0011 is added
 0110 is added
 0011 is subtracted

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