+ Post New Thread
Results 1 to 5 of 5
  1. #1
    Newbie level 4
    Points: 43, Level: 1

    Join Date
    Jul 2019
    Posts
    6
    Helped
    0 / 0
    Points
    43
    Level
    1

    What logic gate is this?

    Click image for larger version. 

Name:	bramka.png 
Views:	3 
Size:	6.3 KB 
ID:	154302
    I have found sketch of something like this in my notebook. It says only XOR. My question is if this is any valid logic gate? And can you explain me this emitter connected to base thing?

    •   AltAdvertisement

        
       

  2. #2
    Advanced Member level 5
    Points: 24,034, Level: 37
    barry's Avatar
    Join Date
    Mar 2005
    Location
    California, USA
    Posts
    4,609
    Helped
    1020 / 1020
    Points
    24,034
    Level
    37

    Re: What logic gate is this?

    It looks to me like it's a weird inverter. But it also looks like a circuit designed to destroy a transistor, because 5V reverse bias B-E is not good idea.

    Why don't you try writing a truth table?

    e.g.

    Base=0, Emitter=0, OUT=1
    Base=1, Emitter=0, OUT=0
    .
    .
    .
    Try it, it's fun!!



    •   AltAdvertisement

        
       

  3. #3
    Newbie level 4
    Points: 43, Level: 1

    Join Date
    Jul 2019
    Posts
    6
    Helped
    0 / 0
    Points
    43
    Level
    1

    Re: What logic gate is this?

    I have no idea how the current flows in this so Im unable to do that. Otherwise i would not ask



    •   AltAdvertisement

        
       

  4. #4
    Advanced Member level 5
    Points: 24,034, Level: 37
    barry's Avatar
    Join Date
    Mar 2005
    Location
    California, USA
    Posts
    4,609
    Helped
    1020 / 1020
    Points
    24,034
    Level
    37

    Re: What logic gate is this?

    Quote Originally Posted by TotalNoob View Post
    I have no idea how the current flows in this so Im unable to do that. Otherwise i would not ask
    Well, what DO you know? Do you know how a transistor works? If not, perhaps you should learn about that first.



  5. #5
    Full Member level 4
    Points: 981, Level: 7

    Join Date
    May 2019
    Location
    Roskilde, Denmark
    Posts
    220
    Helped
    9 / 9
    Points
    981
    Level
    7

    Re: What logic gate is this?

    Quote Originally Posted by TotalNoob View Post
    I have no idea how the current flows in this so Im unable to do that. Otherwise i would not ask
    Try Youtube if you are the visual type, there are thousands of transistor tutorials in the interweb.

    https://www.youtube.com/results?sear...ansistor+works



--[[ ]]--