[SI-LIST] Re: Measuring Power supply Ripple and Noise
- From: Marc Battyani <marc.battyani@xxxxxxxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 14 Nov 2008 19:15:41 -0500
Jaison,
I very often place some ultra-small coax connectors directly on the
board with a small low impedance smt resistors to make passive probes.
I only use them for tests and qualifications and just remove them form
the production BOM.
The W.FL connectors are really small (2x2mm) and don't take too much
room on the boards:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=H9173CT-ND
(if the URL is smashed just search for H9173CT-ND on digikey.com)
http://media.digikey.com/photos/Hirose%20Elect%20Photos/W.FL-R-SMT(10).jpg
Marc
Jaison Fernandez wrote:
> Hai all,
> I am trying to characterize the power integrity of of a board (that having a
> system clock running at 400Mhz and DDR memory)
> What is the type of probe (Single ended or differential) is best suited for
> measuring power supply ripple and noise in the board.(I am using Tek GHz
> Oscilloscope for this purpose)
> Can any one give any document regarding measuring power integrity of a
> board.
>
>
>
>
> With Warm Regards,
>
> JAISON FERNANDEZ
>
>
>
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