Amplifying micro/nano Amp signals

Discussion in 'General Electronics Chat' started by ping222, Feb 24, 2014.

  1. ping222

    Thread Starter New Member

    Nov 7, 2013
    13
    0
    Hello guys,

    I need to amplify a micro/nano Amp current signal. Then I need to convert this amplified signal to a voltage so a 10 bit analogue to digital converter can read it. I assume I would use some sort of current amplifier followed by measuring the output voltage across a resistor. Is there anything I am missing that the experienced/clever heads in this forum can point out! Thanks in advance,

    Ping.

    p.s if anyone knows of any good current amplifiers please suggest, thanks.
     
  2. MrChips

    Moderator

    Oct 2, 2009
    13,413
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    Before anyone can suggest a solution they would need to know more about the source of this μA/nA signal?

    What is the device?
     
  3. ping222

    Thread Starter New Member

    Nov 7, 2013
    13
    0
    The source is a photodiode being operated in reverse bias mode. Thanks.
     
  4. crutschow

    Expert

    Mar 14, 2008
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    3,826
    What is the highest frequency of the signal?
     
  5. MrChips

    Moderator

    Oct 2, 2009
    13,413
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  6. w2aew

    Active Member

    Jan 3, 2012
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    What you're looking for is a transimpedance amplifier.
     
  7. ping222

    Thread Starter New Member

    Nov 7, 2013
    13
    0
    Thanks for that guys. Yes I have stumbled on a transimpedance amplifier since, so that is what I should stick too!

    crutschow, the frequency of the signal is basically just on/off from time to time, i.e not high frequency.
     
  8. tindel

    Active Member

    Sep 16, 2012
    582
    197
    Last edited: Feb 26, 2014
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