Contant current source and v to i converter

Discussion in 'General Electronics Chat' started by sarita, Aug 12, 2008.

  1. sarita

    Thread Starter New Member

    Aug 12, 2008
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    What is the difference between contant current source and v to i converter?
     
  2. dileepchacko

    Active Member

    May 13, 2008
    102
    1
    Constant current source noting but, which will provide constant current without dipping its voltage ( under a constant load ). An ideal condition constant current source should not have any internal resistance. In some application such as LED lamps and Laser lamps which requires constant current. This link will provide you for more information about constant current sources, with some examples LM317( Voltage regulators ).

    http://users.pandora.be/davshomepage/current-source.htm.

    The basic principle of Voltage to Current convector is nothing but connecting a resistor and allow the current to flow through that resistor. In some application need a current input for analyzing the signal.
    In that situation we used to convert a voltage quantity to current quantity. This link will give you more information regarding conversion technique such as passive technique and active technique.

    http://en.wikipedia.org/wiki/Voltage-to-current_converter
     
  3. bertus

    Administrator

    Apr 5, 2008
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  4. John Luciani

    Active Member

    Apr 3, 2007
    477
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    A constant current source produces a constant current that
    is independent of any other conditions. It has infinite impedance. As the load resistance on the current source increases so does the output voltage. An infinite load resistance (open circuit) would require an infinite voltage.

    A v to i converter is a dependent current source. The output current is dependent on the
    input voltage.

    (* jcl *)
     
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