Exercise: Digital Electronics

Questions for: Digital Electronics

The circuit shown in figure converts
A:
BCD to binary code
B:
binary to excess-3 code
C:
excess-3 to Gray code
D:
gray to binary code
Answer: D
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Subroutines are used in larger programs not
A:
to increase the programming case
B:
to reduce storage equipment
C:
to reduce program extension time
D:
for ease of program testing at the program development time
Answer: D
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For emitter-couple logic, the switching speed is very high because
A:
negative logic is used
B:
the transistors are not saturated when conducting
C:
emitter-coupled transistors are used
D:
multi-emitter transistors are used
Answer: B
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When a TTL is driving an CMOS gates it is necessary to ensure that
A:
VOL(for TTL) ≤ VIL (for CMOS) and V0H (for TTL) ≥ VIH (for CMOS)
B:
V0L (for TTL) ≥ VIL (for CMOS)
C:
V0H (for TTL) ≤ VIH (for CMOS)
D:
V0L (for TTL) ≥ VIL (for CMOS) and V0H (for TTL) ≤ VIH (for CMOS)
Answer: A
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K maps can be drawn
A:
only for 2 variables
B:
only for 3 variables
C:
only for 4 variables
D:
for any number of variables
Answer: D
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