Gates drawbacks and merits...other ways of implementation

Reply to Thread

Discussion in 'Homework Help' started by SynGc, May 9, 2012.

Reply to Thread
  1. May 9, 2012 #1
    SynGc

    Thread Starter New Member

    May 9, 2012
    3
    0
    Hi, im studying for an exam and I need help. Im pretty new to this subject and this forum so I apologize if i do something wrong.

    The question is talking about gate level and design. Question A you must illustrate a logic diagram with NAND 00; OR 01; EX-OR 10 ;ADD 11.

    Question B is where I am stuck, it asks for other ways of implementing several bit stages to implement the same functions and speak of the advantages and disadvantages for each.

    I know the more gates in a sequence the slower and more expensive it is, as you put more gates on the silicon which is expensive.

    Any others?
    Thanks in advance.
     
    #1 Reply
  2. May 9, 2012 #2
    WBahn

    Moderator

    Mar 31, 2012
    23,980
    7,427
    If you are putting gates on silicon (i.e., talking IC design) and if it is a CMOS process, you have the option of implementing the logic equations directly in CMOS instead of using traditional gates. This has the advantage of, generally, the smallest footprint, lowest power, and highest speed. But it is a custom design meaning it takes time to design, layout, and verify.

    You also have the option to use a look-up table for your logic (this is how most FPGA logic is implemented).

    If you are dealing with traditional gates, you can frequently use 'bubble logic' to minimize the gates delays, footprint, and area but generally make the logic function being executed more obscure and, therefore, more difficult to verify and maintain.
     
    #2 Reply
  3. May 9, 2012 #3
    Brownout

    Well-Known Member

    Jan 10, 2012
    2,364
    1,000
    That should about cover it. Speed, size and cost are the major factors. Other effects are more noise, current consumption, heat to dissapate power decoupling requirements, etc.
     
    #3 Reply
Loading...
Related Forum Posts:
  1. em_cardc

    TI MSP430G2553 - Implementation of XOR, OR, AND gates

    Posted by em_cardc in forum: Homework Help
    Replies:
    11
    Views:
    729
  2. disha

    multiplexers for implementation of logic gates

    Posted by disha in forum: General Electronics Chat
    Replies:
    5
    Views:
    2,534
  3. lucifer86000

    Designing and implementation of VFDs on microcontroller

    Posted by lucifer86000 in forum: The Projects Forum
    Replies:
    0
    Views:
    939
  4. Preethi panneerselvam

    Drawbacks of autronic eye

    Posted by Preethi panneerselvam in forum: The Projects Forum
    Replies:
    8
    Views:
    2,065
  5. ximenuquia

    electronic implementation of Logic Gates

    Posted by ximenuquia in forum: General Electronics Chat
    Replies:
    2
    Views:
    4,222
You May Also Like:

  1. Waymo vs. Uber and the LiDAR Tech at Stake

  2. 60 Years of DARPA Technological Advancements: The ARPANET to the Atlas Robot

  3. MCUs Eye Software Add-Ons to Boost IoT Security


Load More Articles