how could this be possible

Discussion in 'General Electronics Chat' started by blue6x, Apr 13, 2005.

  1. blue6x

    Thread Starter Active Member

    Apr 6, 2005
    38
    0
    As we all know, on transistors, the current flows from the collector and the base down to the emitter and then around the whole circuit back again to that base and collector.

    Also, That the base emitter junction, can be assumed as 07 V for silicon while the base collector junction is normally open...

    Now, what if the transistor configuration happens to be on that attached file, whereas the input is fed to the emitter, and the output is connected at the collecter. There is no other way to move the current but to pass it in the reverse operation in contrast to the known principle.

    How could this be possible, and what are the possible output.
     
  2. Firestorm

    Senior Member

    Jan 24, 2005
    353
    0
    is that even possible? Not sure on this 1 :huh:
     
  3. blue6x

    Thread Starter Active Member

    Apr 6, 2005
    38
    0
    I've seen this one in a schematic diagram of a device, that really keeps me wondering cause as we all know it is against the known principle, and yet it was applied on the circuit, this could also be applied to the opto isolators. Any one please give uyour analysis. Thanks....
     
  4. blue6x

    Thread Starter Active Member

    Apr 6, 2005
    38
    0
    is there nyone who could give their thoughts...
    thanks
     
  5. David Bridgen

    Senior Member

    Feb 10, 2005
    278
    0
    It's called a common-base amplifier.

    Characteristics are, no current gain, high voltage gain possible, low input impedance, high output impedance.

    Any decent tutorial on transistors should cover it.
     
  6. blue6x

    Thread Starter Active Member

    Apr 6, 2005
    38
    0
    hey, thanks...
    Now I know that configuration.
    I've look on the topics concerning common base and perhaps it answered my questions in the best possible way
     
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