Digital Electronics - Digital Design

Exercise :: Digital Design - General Questions

6. 

A 0.01-F capacitor is recommended by TTL manufacturers for ________ the power supply.

A. decoupling
B. filtering
C. rectifying
D. grounding

Answer: Option A

Explanation:

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7. 

Why does the data sheet for the 7476 only give a minimum value for the clock pulse width (both HIGH and LOW)?

A. nominal value
B. best-case condition
C. worst-case condition

Answer: Option C

Explanation:

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8. 

Why is the Schmitt trigger needed in the 60-Hz TTL-level clock pulse generator?

A. to provide a triangle wave
B. to provide a sine wave
C. to provide a rounded pulse waveform
D. to provide a sharp pulse waveform

Answer: Option D

Explanation:

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9. 

The main concern when using a pull-down resistor is:

A. the low power dissipation of the resistor
B. it will keep a floating terminal LOW
C. the high power dissipation of the resistor
D. it will cause false triggering

Answer: Option C

Explanation:

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10. 

Look up the propagation delay from the clock to the output for the 7476. Are the HIGH-to-LOW and LOW-to-HIGH propagation delays the same?

A. yes
B. no, tPLH = 25 ns, tPHL = 40 ns
C. no, tPLH = 40 ns, tPHL = 25 ns
D. no, tPHL = 25 ns, tPLH = 40 ns

Answer: Option B

Explanation:

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