Electronics and Communication Engineering - Digital Electronics

6. 

A microprocessor with a 16-bit address bus is used in a linear memory selection configuration (i.e., Address bus lines are directly used as chip selects of memory chips) with 4 memory chips. The maximum addressable memory space is

A. 64 K
B. 16 K
C. 8 K
D. 4 K

Answer: Option A

Explanation:

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7. 

The logic represented by the abbreviation ECL is

A. Emitter Coupled Logic
B. Electron Carrier Logic
C. Encoding Clock Logic
D. Electrostatic Channel Logic

Answer: Option A

Explanation:

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8. 

A (A + B) =

A. A
B. B
C. A
D. B

Answer: Option A

Explanation:

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9. 

Unlimited number of ICs 7490, 78492 and 7493 are available. Which of these could be used to build the dividse-by-60 circuit of figure

A. 7490
B. 7492
C. combination of 7490 and 7492
D. combination of 7492 and 7493

Answer: Option C

Explanation:

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10. 

One of the function of the Sio2 layer in an IC is to

A. act as a dielectric for capacitors
B. prevent shorting of elements by interconnections
C. from cathodes for diodes
D. afford protection from the radiations

Answer: Option B

Explanation:

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