100uΩ Probing Methods
(Room Ballroom H)
18 Oct 18
2:40 PM
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3:10 PM
Measuring DC resistance lower than 100uΩ is trivial using the 4-wire method. Measuring AC impedance in this range using the two-port shunt-through method becomes increasingly difficult as frequencies increase. The location and position of the probes relative to each other is very important, as is the parasitic inductance of each probe. Different calibration methods can be used to partially compensate for these sources of measurement error. Simulations can also be adjusted to mimic the exact probing method used on the DUT. These techniques allow accurate measurements in the 100uΩ range to at least 10MHz.