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  • Users: Tweedle_Dee
  • In Electrical Engineering
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  1. T

    Sense Resistors

    In a 4-wire (kelvin) measuring system, why are there "sense" resistors? I understand that because there is very little current on the sense line there is no voltage drop. What purpose do they serve?
  2. T

    Overshoot and the 10x probe

    That helped a lot. Thanks for all the input. This is a great forum! http://photos.imageevent.com/crossfamily/campingatsunsetbay/large/ConsultClk_w_470ohms.PNG [Broken]
  3. T

    Overshoot and the 10x probe

    As far as I know, fast edges are not important so I think this fix will be acceptable. I'll experiment with it tonight and report back. Thanks a ton.
  4. T

    Overshoot and the 10x probe

    Ah yes, that makes sense. Hadn't thought of that. Okay, this is starting to make sense. So, would a possible fix be to add a 1k resistor to the output causing it to be loaded at all times? 1k load when turning on, 2k load when turning off.
  5. T

    Overshoot and the 10x probe

    1k resistor on drain. I didn't think 150k was high enough frequency to worry about reflections although I know as the wire length increases, it's more likely to become an issue.
  6. T

    Overshoot and the 10x probe

    Just noticed that my probe shows 115pF on 1x and 16pF on 10x. However, when I put a 22pF or 100pF cap to ground in parallel with my probe set to 10x, the overshoot increases??
  7. T

    Overshoot and the 10x probe

    I'm working on a microcontroller project where I'm sending out a clock signal at 153kHz and then converting it to 0 to 12V levels using a n-channel MOSFET. The wires are approximately 2 feet long after the conversion. I was disturbed by the excessive overshoot I was seeing on my USB scope. I...
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