Digital Computer Electronics – Section 1

11. A p- channel enhancement type MOSFET performs much the same function as a PNP transistor, except that

A. it operates much faster
B. it is considerably larger
C. it is controlled by voltage rather than by current, so that it requires very little current at the control terminal
D. it is controlled by current rather than by voltage like a bipolar transistor.
E. None of the above

Correct Answer:  C. it is controlled by voltage rather than by current, so that it requires very little current at the control terminal

12. De Morgan’s second therm says that NAND gate is equivalent to a bubbled _____ gate.

A. AND
B. XAND
C. XOR
D. OR
E. None of the above

Correct Answer:  D. OR

13. What logic function is produced by adding an inverter to each input and the output of an AND gate?

A. NAND
B. NOR
C. OR
D. XOR
E. None of the above

Correct Answer:  C. OR

14. When a transistor is cut off or saturated, transistor _____ have almost no effect

A. wave
B. variations
C. stage
D. circuits
E. None of the above

Correct Answer:  B. variations

15. Express -7 as 16-bit signed binary numbers.

A. 0000 0000 0000 0111
B. 1000 0000 0000 0111
C. .  0111 0000 0000 0001
D. 0111 0000 0000 0000
E. None of the above

Correct Answer:  B. 1000 0000 0000 0111

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