Hi,
Today I was scope probing the output of an offline 300W linear regulator. (Mains transformer/rectifier/capacitor/regulator). Output was 69.5V at 5A.
When I probed from Vout to GND I got the attached trace, which was noisy.
I wanted to see if the noise was just pickup from the surroundings, so I attached both probe tip and GND to the Vout node only, and looked again…but this gave a much quieter trace (as attached), which kind of proves that the noise was actually coming from the linear regulator output?
Today I was scope probing the output of an offline 300W linear regulator. (Mains transformer/rectifier/capacitor/regulator). Output was 69.5V at 5A.
When I probed from Vout to GND I got the attached trace, which was noisy.
I wanted to see if the noise was just pickup from the surroundings, so I attached both probe tip and GND to the Vout node only, and looked again…but this gave a much quieter trace (as attached), which kind of proves that the noise was actually coming from the linear regulator output?
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