arrows the wrong way in the common base amplifier

Discussion in 'Feedback and Suggestions' started by Unregistered, Nov 22, 2009.

  1. Unregistered

    Thread Starter Guest

    On the page The common-base amplifier, the topmost picture, I think all the arrows are the wrong way around. Current flows from + to - , and the potiental on the collector is the highest, meaning the current flows from the collector to the base and emitter connections.

    Page: http://www.allaboutcircuits.com/vol_3/chpt_4/7.html
    Picture: http://sub.allaboutcircuits.com/images/03114.png

    Small typo on he same page:
    Since it obviously can't boost signal current, it only seems reasonable to expect it to boost signal voltage. A SPICE simulation of the circuit in Figure below will vindicate that assumption.
    Correction:
    Since it obviously can't boost signal current, it only seems reasonable to expect it to boost signal voltage. A SPICE simulation of the circuit in Figure below will indicate that assumption.
     
  2. studiot

    AAC Fanatic!

    Nov 9, 2007
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  3. Unregistered

    Thread Starter Guest

    Thank you for your fast reply.

    I see. I am new here, and did not see any other page (at least not until I read your post.)

    I think it's a good idea to add a small remark on the page that the arrows show electron flow instead of conventional current flow. This will help people like me that expect the arrows to show conventional current flow, and don't read the rest of the book.

    PS, I will see if I can get myself registered

    Best regards,
    Cedric
     
  4. cedric2

    New Member

    Nov 22, 2009
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    I have registered myself as cedric2.

    Best regards,
    Cedric
     
  5. studiot

    AAC Fanatic!

    Nov 9, 2007
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    Welcome Cedric, if you are interested in things electronic or even vaguely scientific you will find many a good yarn here.
    We even let a bit of truth slip by occasionally

    :D
     
  6. Wendy

    Moderator

    Mar 24, 2008
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    We get that a lot here, but electron flow is the physical reality of electricity, so it was used. This was explained in Volume 1, Chapter 1, Section 7.

    http://www.allaboutcircuits.com/vol_1/chpt_1/7.html

    Conceptually people still use conventional flow, and it works for a lot of applications. When you get into the higher end of electronics and physics it tends to break down though, as the actual mechanisms become important.

    Welcome aboard, and have fun.
     
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