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WorksheetsDigital Electronics
Total questions: 15
Worksheet time: 12mins
SR Latch consists of
2 inputs
3 inputs
1 inputs
4 inputs
Asynchronous sequential logic circuit does not depend on
inputs
inputs and outputs
clock
outputs
If each of the possibilities of a race eventually leads to the same stable state, then the race is said to be
Non critical race
critical race
cycle
hazard
For the asynchronous sequential circuit shown in Fig.1, choose the appropriate next state equations
Y1=xy1+x’y2
Y2=xy’+x’y2
Y1=xy1+xy2
Y2=x + x’y2
Y1=x’y1+x’y2
Y2=x’y’+x’y2
The Fig 3 shown below illustrates
Races
Dynamic hazard
Static-1-hazard
Static-0-hazard
In the following PLA structure, which output implements the logic function ABCD?
X
Y
Z
X AND Y
Find the number of feedback loop shown in Fig
1
2
3
4
The present-state and next-state variables in asynchronous sequential circuits are customarily called
State variables and secondary variables
State variables
excitation variablesand secondary variables
secondary variables and excitation variables
The inputs in the PLD is given through
NAND gates
OR gates
NOR gates
AND gates
PLA refers to
Programmable Loaded Array
Programmable Logic Array
Programmable Array Logic
None of the above
PLAs, CPLDs, and FPGAs are all which type of device?
SLD
SRAM
PLD
EPROM
The difference between a PLA and a PAL is:
the PLA has a programmable OR plane and a programmable AND plane, while the PAL only has a programmable AND plane
the PAL has a programmable OR plane and a programmable AND plane, while the PLA only has a programmable AND plane
the PAL has more possible product terms than the PLA
PALs and PLAs are the same.
The following map shown in Fig illustrates
Static-1-hazard
Static-0-hazard
Dynamic hazard
Essential hazard
How many different states does a 3-bit asynchronous counter have?
2
3
8
16
The difference between PLA and PROM
PLA is sequential PROM is combinational
PROM is sequential PLA is combinational
PLA economizes on the number of minterms to implement Boolean function
PLA has fixed AND
PROM has fixed OR
