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Digital Electronics

Digital Electronics
The output of a gate is LOW when at least one of its inputs is HIGH. This is true for

 NOR
 OR
 NAND
 AND

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Digital Electronics
While using a frequency counter for measuring frequency, two modes of measurement are possible. 1. Period time 2. Frequency mode There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4Mhz the crossover frequency is given by

 2 Khz
 1 Khz
 8 Mhz
 2 Mhz

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Digital Electronics
A debouncing circuit is

A latch
An astable MV
A monostable MV
A bistable MV

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Digital Electronics
The universal gate is ___________

NAND gate
None of these
AND gate
OR gate

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Digital Electronics
Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is

ECL
CMOS
TTLAS
TTLLS

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Digital Electronics
The output of a gate is HIGH if and only if all its inputs are LOW. It is true for

 X-OR
 NOR
 X-NOR
 NAND

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