[SI-LIST] : Re: Methods to introduce noise in power planes

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From: Farrokh Mottahedin (farrokh@cisco.com)
Date: Wed Apr 18 2001 - 14:56:48 PDT


Dear Mr. Anderson,

Would you be willing to share the vendor name and part number of the
broadband bias tee mentioned in your reply below.

Thanks,

Farrokh Mottahedin

  -----Original Message-----
> From: Ray Anderson [SMTP:Raymond.Anderson@Sun.COM]
> Sent: Monday, April 16, 2001 3:34 PM
> To: si-list@silab.eng.sun.com
> Subject: Re: [SI-LIST] : Methods to introduce noise in power planes
>
>
> Although there are several ways of doing this, one method which we
> use in our lab and have had really good results with is to utilize
> a commercial broadband bias tee to inject the noise.
>
> Feed the DC power to your system through the tee's RF choke. Inject
> your desired noise into the system via the capacitively coupled port.
>
> We've also tried building up ferrite transformers etc. to try to
> match the 'noise' to the ultra low impedance of the boards power
> distribution system but found the bias tee method works much better.
>
> Ray Anderson
> Sun Microsystems Inc.

==============================================
Farrokh Mottahedin, Cisco Systems, Inc.
Gigabit Systems Business Unit GSBU
(408) 525-9185
farrokh@cisco.com

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