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Lab experiment date:
September 5, 2008
Name:
Eric Andrysiak
Lab Day:
Friday
Lab time:
7:30am
Lab instructor:
Katham
Lab number:
2
Title of experiment:
Breadboarding Combinational Logic Circuits
Write a technical response to each of these questions.
Look at the truth table of circuit R. What is the overall logic function of this circuit?
(A+B)+C
Would it change the output if you rearranged the input variables for circuit R?
The whole gate is a giant OR circuit. So, whenever you turn any 1 input on, the output is
high. So, even if y ou rearanged the input variables, the outputs would still be
high on everything except when all the inputs are low.
Look at the truth table of circuit S. What is the overall logic function of this circuit?
!(!A*!B)
! =  = Invert
Can NAND gates create OR functions?
Yes, an AND of A B,
could be 00, 01, or 10. So, even though it has an AND in the
name, it can still accept multiple input combinations
How could you get rid of the 7404 inverters and use only NAND gates for this circuit?
If, you have to NAND gates that both use AB and hook those 2 NAND gates up to a 3
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This note was uploaded on 10/14/2009 for the course ECET 109 taught by Professor Staff during the Spring '08 term at Purdue UniversityWest Lafayette.
 Spring '08
 Staff

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