Instrument Amp help

Discussion in 'Homework Help' started by TickHogan, May 8, 2013.

  1. TickHogan

    Thread Starter New Member

    May 8, 2013
    1
    0
    Hi,

    I have a dpm342 4-20mA loop powered LCD readout, and I want it to read a 36k variable resistor with a 5v supply over its entire range. I know I have to use a op amp, but not sure which one, or the circuit I need. Can anyone help me?

    In summary, I need a circuit to convert a signal of (541.61uV - 3.97V) to a current of (4mA to 20mA).

    Cheers
     
  2. WBahn

    Moderator

    Mar 31, 2012
    17,715
    4,788
    Look up information on current-to-voltage converter circuits and come back after you've looked through that and are in a better position to put together at least the start of an attempt at a solution.
     
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