R:[SI-LIST] : LVDS signal observation

About this list Date view Thread view Subject view Author view

From: Vigliarolo Roberto (Vigliarolo@asamrt.interbusiness.it)
Date: Thu Feb 03 2000 - 01:11:49 PST


Look at http://emcesd.com/pdf/cd94scr.pdf

Regards,
Roberto Vigliarolo
Ferrovie dello Stato SpA

> ----------
> Da: greg kimball[SMTP:gkimball@indra.com]
> Risposta a: si-list@silab.eng.sun.com
> Inviato: giovedý 3 febbraio 2000 6.03
> A: si-list@silab.eng.sun.com
> Oggetto: Re: [SI-LIST] : LVDS signal observation
>
> Joe-
> I'll second the motion re passive probes being of value at hundreds to GHz
> range. Take a note of the Xc of the TEK P6248 - At 500MHz(0.7ns tr), the
> 1.5pF
> differential input capacitance is 212 ohms!! I believe the passive probe
> design Howie Johnson mentions in his High Speed Digital Design book
> is about 1K and a fraction of a pF I believe, and much better usable
> voltage
> range. BUT, on the downside - it is only single-ended.
>
> Does anyone know of a truly balanced passive diff probe design??
>
> Regards,
> Greg Kimball
> TI Storage Product GP
>
> jjcahill@us.ibm.com wrote:
>
> > FET probes can be had with very low input C and reasonably high input R,
> > and very nice BW. I prefer passive probes however. They are 5X cheaper,
> > they can be had with 1kOhm input R and they usually fit in smaller
> places
> > than the good active probes. Another benefit is that nobody else wants
> them
> > so the lab thieves leave them right where I put them down :-)
> >
> > If you are going to do any debugging buy a scope with a high single
> trigger
> > sample rate, and watch out for specs based upon interleaving digitizers.
> > The CSA series scopes will do very nicely if your signal is repetitive,
> but
> > if your 'oddity' only occurs once a second you will never see it with
> > anything but a trigger crafted for the oddity and a high sample rate
> single
> > shot scope. The high end Infinium and the Tek TDS684 and TDS694 are the
> > instruments I am familiar with.
> >
> > Joe
> >
> > CEC Analysis and I/O Design
> > Phone: 507.253.0762 Fax: 507.253.4966
> > jjcahill@us.ibm.com
> >
> > **** To unsubscribe from si-list: send e-mail to
> majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
> si-list, for more help, put HELP.
> > si-list archives are accessible at http://www.qsl.net/wb6tpu
> > ****
>
>
> **** To unsubscribe from si-list: send e-mail to
> majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
> si-list, for more help, put HELP.
> si-list archives are accessible at http://www.qsl.net/wb6tpu
> ****
>

**** To unsubscribe from si-list: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Thu Apr 20 2000 - 11:34:53 PDT