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U2L2NORlogicDesign

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
A NOR gate with inverted inputs functions as
a.
an OR gate.
c.
a NOR gate.
b.
a NAND gate.
d.
an AND gate.
 

 2. 
An AND with bubbles on its inputs is equivalent to
a.
a NOR with bubbles in its inputs.
b.
a NAND with bubbles on its inputs.
c.
a NAND with a bubble on one input.
d.
a NOR.
e.
an AND with a bubble on one input.
 

 3. 
A NOR gate with a bubble on one of its inputs is equivalent to
a.
a NOR with bubbles in its inputs.
b.
a NAND with bubbles on its inputs.
c.
a NAND with a bubble on one input.
d.
a NOR.
e.
an AND with a bubble on the other input.
 

 4. 
A NOR gate with all inputs tied to one signal functions as
a.
an inverter.
c.
an AND gate.
b.
a NAND gate.
d.
an OR gate.
 

 5. 
A NOR gate with its output inverted functions as
a.
a NAND gate.
c.
an AND gate.
b.
an inverter.
d.
an OR gate.
 

 6. 
A NOR gate with each input inverted functions as
a.
an OR gate.
c.
an inverter.
b.
an AND gate.
d.
a NAND gate.
 

 7. 
For you NOR implementations in the Booth and Alarm circuit, how many IC’s (74LS02 chips) were required to implement your circuits? Remember, we are counting ICs, not gates.
a.
11
c.
4
b.
15
d.
2
 

Problem
 

 8. 
This is the same information from the NAND assignment.  Read below for how to do this as a NOR circuit.
The block diagram below represents a voting booth monitoring system.  For privacy reasons, a voting booth can only be used if the booth on either side is unoccupied.  The monitoring system has four inputs and two outputs.  Whenever a voting booth is occupied, the corresponding input (A,B,C, &d) is a (1).  The first output, Booth is a (!) whenever the voting booth is available.  The second output, Alarm, is a (1) whenever the privacy rule is violated.

pr008-1.jpg

Implement NOR only combinational logic circuits for the two outputs Booth and Alarm.  These NOR only designs will be compared with the original AOI implementations in terms of efficiency and gate/IC utilization. 

For the sake of time, the truth table and K-Maps for the voting booth monitor systems have been completed for you.  Note, the output for Booth utilized several don’t care conditions.

pr008-2.jpg
Part 1:
Using the AOI circuits that you developed for this in the NAND assignment,
Re-implement these circuits assuming that only 2-input NOR gates (74LS02) are available.  Using Multisim, draw these circuits.

Booth NOR
Alarm NOR

Part 2:
Using the NOR designs in part 1, draw the Booth and the Alarm as one circuit. 

Use switches for the inputs A, B, C, and D and a probe or LED for the outputs Booth and Alarm.  Verify that the circuits are working as expected.
Email me a copy of your circuits from Part 1 and Part 2.  I must verify that your simulation is working in class.
 



 
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