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Recent content by gareth-71

  1. G

    HELP with diff amp circuit design

    Thank you for your replies.... So how would I go about this?
  2. G

    HELP with diff amp circuit design

    I tried to post image, but I have a message saying Admin needs to approve... - - - Updated - - - No, not at all. I am interfacing to ABS signals on a race car. Normally I can interface directly and this works great (because I can bias the signal directly to Gnd), but in this application there...
  3. G

    HELP with diff amp circuit design

    Hi I can't interfere with the signal. So diodes / clamps etc are a no no unless I can use 100kR resistors in series with the two input lines... Here is a signal conditioning circuit that works on the sim but not in practice. Interestingly I accidentally swapped the inputs on the last OpAmp...
  4. G

    HELP with diff amp circuit design

    Ok, so I think what I am trying to do should be simple enough with a diff amp... The signal is not ground biased, so I need to convert it being ground biased. How do I convert a non-ground biased signal to a ground biased signal? One way I guess I can do it is by using an ADC with...
  5. G

    HELP with diff amp circuit design

    Hi No, I don't. My attempts are not working, so I thought I would see what ideas came up and then design around that to see what people think.
  6. G

    HELP with diff amp circuit design

    Hi I need help with a relatively simple Analog design problem.... I have a differential signal that I am 'tapping' into. (It goes to another system...so input impedance of my circuit must be high > 100kR). The characteristics of the signal are: Amplitude can be 1vpp to 5vpp Offset is...
  7. G

    [SOLVED] RPM Sensor Singnal Conditioning Using LM1815

    Hi Is there a reason you are choosing the LM1815? I can point you in the direction of a very robust and low cost solution that I use.

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