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#338: Probe Tips: Beware of capacitive loading of oscilloscope probes on your circuit operation

Duration: 06:54Views: 17.1KLikes: 1.9KDate Created: Oct, 2021

Channel: w2aew

Category: Science & Technology

Tags: circuitfet probestektronixoscilloscopetestingprobestekloadingw2aew

Description: The capacitive loading of your oscilloscope probe might affect the operation of your circuit - certainly something to keep in mind when probing around. The test circuit used in this video is shown at 11:08 in this video: youtube.com/watch?v=G9zZRNzhsEE&t=668s ...and I'm probing across Cs in the lower left corner of the schematic. 1X passive probe can have 100pF or more of capacitive loading which can dramatically affect many circuits. 10X probes are typically 8-15pF or so, with some exceptions. Active FET probes offer very low capacitive loading, typically under 1pF.

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