Why are the 330 Ω resistors required for the discrete logic circuit, but not for the MultiSim simulated circuit or the eSOC III circuit

Paper, Order, or Assignment Requirements

Laboratory Report Cover Sheet
DeVry University
College of Engineering and Information Sciences

Course Number: ECET-105


Laboratory Number: 6

Laboratory Title: Decoders and Multiplexers

Submittal Date: Click here to enter a date.




Name Program Signature
Name Program Signature
Name Program Signature






A.        Discrete Circuit Design ( Multisim).



A 1.Output with Data Select LOW:


Display =  

A.2 Output with Data Select HIGH:


Display =  

A.3 Photograph of your final Multisim circuit and submit it here below:

B.        Design Project (Quartus II)


B1.Photograph of your final circuit and submit it here below:




  1. Why are the 330 Ω resistors required for the discrete logic circuit, but not for the MultiSim simulated circuit or the eSOC III circuit



  1. Create a partial truth table showing the requirements for a seven-segment decoder to output a hexadecimal digit. This requires four input bits and six output states, A – F. For each output state, show the segments a-g. The output states for the inputs 0 – 9 are the same as for the 74LS47 (see focus.ti.com). Use capital letters A, C, E, F and lower case for b and d.
  2. Why is the seven-segment display driven with an active-LOW signal using discrete logic and an active-HIGH with the eSOC board




Deliverable Points Available Points Achieved
Laboratory Cover Sheet 8
Working Circuit(s)/Program(s) 10
Observations/Measurements 7
Questions 10
Total Points 35




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