Which is preferred:current or voltage controlled device?

Discussion in 'General Electronics Chat' started by cheenu_2002, May 6, 2008.

  1. cheenu_2002

    Thread Starter New Member

    May 6, 2008
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    Hi,
    I have a question on which of the following active devices are preferred:
    Current or Voltage controlled device and the reasons for the same.

    Thanks & Regards
    Srini.
     
  2. studiot

    AAC Fanatic!

    Nov 9, 2007
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    That's too wide a question to have a definite answer. It kinda depends on your application.

    Some loads are voltage driven, some are current driven.

    Some active devices produce an output voltage, some output current.

    Connecting a current (voltage) output to a current (voltage) input is easier than using a mixed interface. If you connect in mixed mode you rely on the linearity of the impedances.

    If you would like to provide more context to your question we could narrow down the answer.
     
    Last edited: May 6, 2008
  3. cheenu_2002

    Thread Starter New Member

    May 6, 2008
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    I actually came across this question when I was browsing through the pages in Ben G.Streetman, Solid State Electronic Devices. So I wanted to know which 3 terminal active device is preferred.
     
  4. studiot

    AAC Fanatic!

    Nov 9, 2007
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    It still depends upon your application, no device is perfect. Mr Streetman probably takes a whole book to answer your question.
     
  5. beenthere

    Retired Moderator

    Apr 20, 2004
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    If your "three terminal device" is a transistor, then current control. If a FET, then it's voltage control.
     
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