Products > Test Equipment
Looking for a Probe to Use for 5V DC Power Supply Ripple Measurement
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blinken:

--- Quote from: JDW on January 23, 2024, 06:34:01 am ---Googling further led me to Patrick Coleman, who has forked Levido's design and posted all the details on his Github page here:
https://github.com/blinken/power-rail-probe/tree/main

Coleman even sells a fully assembled device, complete with a matte black enclosure professionally overlaid with white text:
https://paradar.co.uk/products/low-noise-oscilloscope-power-rail-probe

£249 (US$317) fully assembled
£45 (US$57) for blank PCB & enclosure (must buy components on BOM separately yourself)

--- End quote ---

I was sent a link to this thread - thank you for the recommendation, JDW! The power rail probe project is still early days, though the v1.0 model works very well for my purposes (I use it day-to-day, and the frequency response is flat within about 3dB to 500MHz).

If anyone is interested in assisting, it would be good to publish some real-world data on the noise levels of the design. If you happen to have access to a calibrated noise source (ie. with well-characterised ENR to 1GHz) and a good spectrum analyser or noise figure meter, and have a little bit of time to help, I would be very grateful if you could reach out.

-Patrick
Kosmic:
User blackdog has been posting recently about an amplifier he is designing to measure power supply noise: https://www.eevblog.com/forum/projects/40db-measuring-amplifier-with-filters/

Look interesting.
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