Electronics and Communication Engineering - Digital Electronics

41. 

In 8085, to disable the whole interrupt system (except TRAP)

A. the DI instruction may be used
B. the DO instruction may be used
C. the INTERRUPT instruction may be used
D. the El instruction may be used

Answer: Option A

Explanation:

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42. 

The reason for glitches on the outputs of decoding gates on a synchronous counter is

A. FFs changing states together
B. FFs changing states one at a time
C. AND gates not functioning properly
D. none of the above

Answer: Option B

Explanation:

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43. 

EEPROM is also known as

A. UVPROM
B. EAPROM
C. both UVPROM and EAPROM
D. none of the above

Answer: Option B

Explanation:

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44. 

The MOS symbols shown indicates:

  1. that it is depletion type
  2. that it is enhancement type
  3. that it is n channel
  4. that it is p channel
  5. that electrons flow from D to S
  6. that holes flow from D to S
The only true statements are

A. 1, 3, 6
B. 2, 4, 6
C. 1, 3, 5
D. 2, 3, 6

Answer: Option A

Explanation:

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45. 

As compared to TTL, CMOS logic has

A. higher speed of operation
B. higher power dissipation
C. smaller physical size
D. all of the above

Answer: Option C

Explanation:

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