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Control system

  1. Sep 13, 2010 #1
    in control system, why have so many device like transistor? Wat is them function?
     
  2. jcsd
  3. Sep 13, 2010 #2
    The essence of a control system is feedback to control output. It may be positive or negative as described here:
    http://en.wikipedia.org/wiki/Electronic_feedback_loops#Types_of_feedback

    It's not directly related to a transister but is rather a circuit configuration.


    The transister is used primarily as an amplifier, that is, boosting a weak input to provide a more powerful output.
    Here is one brief explanation:
    http://www.physlink.com/Education/AskExperts/ae430.cfm

    Transisters are widely used in many circuits because of their efficiency....very low heat loss for example.....and fast response times..they replaced vacuum tubes which used a lot more power and could not be made nearly as small as solid state transisters.
     
    Last edited: Sep 13, 2010
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