Re: [SI-LIST] : Return path for stripline, two ground planes or one power and one ground?

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From: Vinu Arumugham (vinu@cisco.com)
Date: Tue Apr 04 2000 - 11:57:25 PDT


"Ingraham, Andrew" wrote:

>
>
> If the driver is PECL, then ~all the switching current goes through the IC's
> power (+Vcc) pins and ~none through the ground (-Vee) pins. In that case,
> stripline between two power planes would be best. (Or with normal ECL, use
> stripline between two ground planes. That's why ECL used a negative
> supply!)
>

But PECL is usually implemented with pull down resistors to GND at the source. It seems to me then that there will be no difference whether the stripline is implemented between GND planes, power planes
or one of each.

Vinu

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