FreeLists / si-list / [SI-LIST] Re: Differential vs. SE, Propagation speed comparison

[zhangkun 29902 <zhang_kun@xxxxxxxxxx>]

Chris

You maybe simulate microstrip, where differential signals have a faster 
propagation time than single ended signals. If you are simulating stripline, 
diferential signals should be as fast as single ended signals.

The velocity of transmission line is decided by the equivalent relative EPS. In 
microstrip differential line, more EM energy is stored in the air. Therefore, 
the velocity would be faster.

Hope this is helpful.

Best Regards

Zhangkun
2005.4.8

----- Original Message -----
From: Chris McGrath <chris.mcgrath@xxxxxxxx>
Date: Friday, April 8, 2005 3:53 am
Subject: [SI-LIST] Differential vs. SE, Propagation speed comparison

> 
> I just read in an app note that "differential signals have a faster
> propagation time than single ended signals".
> 
> I have played around with some simple simulations and can produce some
> scenarios where this seems to be true, but I'm having a problem
> understanding the physics of why this should be.  Can anybody shed 
> somelight on this?
> 
> Thanks,
> Chris
> 
> 
> ------------------------------------------
> Chris McGrath
> Sr. Hardware Engineer
> ADIC
> ph: (607) 241-4858
> eM: chris.mcgrath@xxxxxxxx
> ------------------------------------------
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