Connect with us

What component does this symbol represent?

Discussion in 'General Electronics Discussion' started by Beogeo, Dec 16, 2015.

Scroll to continue with content
  1. Beogeo

    Beogeo

    2
    0
    Dec 16, 2015
    circuitSymbol.PNG
    I was thinking it might be an LED, but it is missing the light arrows. Besides, an LED wouldn't really make since in the circuit I'm looking at.
     
  2. BobK

    BobK

    7,682
    1,688
    Jan 5, 2010
    Could be a constant current source, though normally, it is an arrow in a circle without the leads being connected to the arrow.



    Bob
     
    davenn likes this.
  3. Beogeo

    Beogeo

    2
    0
    Dec 16, 2015
    LM386 Schematic.png
    So, is the constant current provided by the voltage source in the top right?
     
  4. AnalogKid

    AnalogKid

    2,504
    719
    Jun 10, 2015
    That is National's standard symbol for a constant current source, something that takes 2 or more transistors.

    ak
     
    Tha fios agaibh and davenn like this.
  5. dorke

    dorke

    2,342
    665
    Jun 20, 2015
    No,
    the current source is a circuit by itself which is only feed by Vs.
    In an IC it will be composed of transistors.
    There are many ways to create a current source(google it).
    These IC diagrams are merely conceptual, as you can see the other one is represented by the symbol alone.
    Actually you have one shown "with details" in the specific IC,look at the red in the pic.

    LM386 Schematic.png
     
  6. EK61

    EK61

    49
    4
    Jan 5, 2014
    I was going to say a diode, but then I saw the whole diagram. After seeing this I'm even more annoyed that they taught us at school that a diode symbol includes a circle just like that. (I knew better fortunately)
     
  7. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    652
    May 8, 2012
    In the "old days" Diodes were commonly drawn within a circle but so were Transistors. It was most probably accepted that way because we were transitioning from Vacuum (Valves) Tubes.

    Every now and then I come across some of my schematics drawn between the 60's & 70's. Diodes and Transistors are shown within a circle. Can't say that I miss doing that. ;)

    Chris
     
  8. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    652
    May 8, 2012
    Just so there's no ambiguity I'm not referring to the symbol you posted as it does not indicate a Cathode terminal. I'm referring to this...

    [​IMG]
    Chris
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-