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Digital Electronics

Digital Electronics
For the design of a combinational circuit with four inputs using only NAND gates, the number of K-maps required for the simplification process is

 2
 1
 4
 0

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Digital Electronics
What is the Boolean expression for a two-input AND gate ?

 A + B
 A & B
 A.B
 A - B

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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 .

 250 Hz.
 500 Hz.
  1 KHz.
 2 KHz.

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Digital Electronics
Which is typically the longest: bit,byte,nibble,word?

 byte
 bit
 nibble
 word

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Digital Electronics
AND-OR realization of a combinational circuit is equivalent to

 NOR-NOR realization
 NOR-NAND realization
 NAND-NOR realization
 NAND-NAND realization

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

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

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