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Power sensor signal conditioing

Discussion in 'General Electronics Chat' started by charbel89, Oct 5, 2008.

  1. charbel89

    charbel89 New Member

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    For the benefit of others viewing this thread here is Erics response:

     
  2. charbel89

    charbel89 New Member

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    Thanks.

    I think I understand. my issue was that I was revising the circuits and for the AD736 it is pretty clear because it is out of the datasheet mainly, however for the CA3140 it is more custom and it was hard for me to deduce the circuit from the datasheet.

    So I was pretending that the circuit is not there and I need to build it, so how would I go about doing that just by looking at the datasheet. i.e. to arrive at the same circuit I currently have...

    Which is why I was asking why the choice of 10k resistor at +NI and not 15K or 1K, and why the 4k7 at 2 and why is 2 connected to 6 and what is the datasheet diagram equivalent that justifies the circuit i have..

    Those were my questions ....



    I have built the cicuit and tucked it away in a plastic box with a switch and all.. very crude (ehm I am mean professional) it is doing its job.

    I will post some pictures in the next few weeks.. I am just a bit busy now..

    Thanks a lot for everything..

    Charbel.
     
  3. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    hi Charbel,
    Pleased hear you project is working OK.:)

    With regard to your questions, I have posted a pdf of OPA basics.

    If you plan other projects using operational amplifiers, it would be useful to read thru the pdf.
     

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