Logic gates — 66 discussions

  1. A

    Designing a Logic Gate Hardware for Efficient Table of Logic

    Hello Forum , please can someone help me to design the hardware of this table of logic (by the use of the logic gate) , the table is in the attachment. Thanks in advance
  2. L

    Constructing Logic Gates on a Breadboard

    I've been reading articles on logic gates and What I want to do before I get to school is familiarize myself with what individual components are used in making those individual gates on say a breadboard.I keep searching for it on the web but it just gives me the schematic symbols and not what...
  3. K

    Graduate Self-Adjoint Operators and Reversible Logic gates

    Does anyone know if there is a relationship between the requirement in Quantum Computing that logic gates be reversible and the requirement in Quantum Mechanics that observables have to be self-adjoint?
  4. C

    How Can You Design a Circuit Using Only AND and NAND Gates with Four Switches?

    Homework Statement Using only AND and NAND gates, design a circuit in which 4 switches must all be turned on before a switch in another circuit turns off. i think half the reason i don't understand may be the wording of his question, i know the tables but i am not sure how the logic gates...
  5. H

    High School How Do AND/OR Logic Gates Work with Diodes?

    http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/diodgate.html Could someone please explain to me why these circuit arrangements act as AND/OR gates, can't find a decent explanation in any of my books
  6. C

    How do logic gates work and what are their uses in circuits?

    Hi! I'm new to this forum, just joined a couple of hours ago. I am an O-Level student and I am currently on revision leave. I would like some explanations on the basic working principle of logic gates and their uses in special circuits. The clearer the explanation the better and some links to...
  7. E

    Can u make if A>=B then output=1 Else output=0 using these logic gates?

    [SOLVED] can u make "if A>=B then output=1 Else output=0" using these logic gates? Homework Statement this is not quite a homework problem. I am designing a device and I need to use A>=B comparator. The challenge is I need to do this using only NAND, AND, NOR, OR and ExclusiveOR gates...
  8. R

    Diode Logic Gates circuit analysis?

    I need to understand how diode-resistor gates work. I've read a lot about what's supposed to happen based on inputs, but I need to see some numbers & analysis to understand what's going on. Where do you start in terms of trying to analyze the following AND gate...
  9. R

    Logic gates problem Need to check if my answers are correct

    [SOLVED] Logic gates problem...Need to check if my answers are correct.. Homework Statement http://img132.imageshack.us/img132/8899/19367959nt9.jpg Homework Equations The Attempt at a Solution http://img220.imageshack.us/img220/2338/answerslo5.jpg Now I wasn't sure how...
  10. M

    How do I identify source and drain in MOSFET symbols?

    I'm doing logic gates using their basic components MOSFETs. I have no idea how to understand which is the source and drain of the transistor from a symbol diagram when given both the n type and the p type. I also cannot understand what happens when the source is connected to ground. Can someone...
  11. W

    Cs major questions on logic gates

    The very first part of the "electrical engineering and computer architecture for programmers" course I took glossed over a few things, and I have about 3 more questions, and thought I'd try online. They're in a fairly long html file with several diagrams, at...
  12. P

    Program to convert Boolean expressions to logic gate diagrams

    Drawing Logic Gates! hey guys, im new to this posting thing on this site...if any of u belong to bossgtcentral.com, i am xcortman there lol... Anyway guys i am looking for a program that allows me to enter a boolean expression no matter how complicating it is and i want it to give me the Logic...
  13. C

    What do logic gates do and why are they needed in computers?

    Hello all Just refreshing for computer science midterm, and need to review logic gates. What exactly are logic gates? I know that they include AND OR XOR etc... but why is it really needed? Could you please provide some examples of their effiiciency in the real world? Thanks a lot
  14. N

    What software can I use for drawing Logic gates?

    What software can I use for drawing Logic gates? I am just too lazy to draw it by mouse and also drawing gates with different shape isn't elegant. So, I want a simple software that can draw Logic gates, And, OR, gates etc...
  15. S

    How Can Multiple ALUs be Connected to Create a Layered Structure?

    If I have an 8-bit ALU, how would I hook them up to do the layer thing (I don't know the name)? It's the thing that you start with 4 ALUs, then they go down to 2, then those go down to 1. Are all the inputs for each of the original 4 separate, or do they share some inputs? How to two go down to...
  16. S

    What components make up a 1-bit computer built from logic gates?

    Anyone know of a site that explains a 1 bit computer made from logic gates, or at least what all is needed for a one bit computer (all I know is an ALU)?