[SI-LIST] Re: AW: Re: Methods to reduce SDD11
- From: Jack Si <sij99@xxxxxxxxx>
- To: "Gert.Havermann@xxxxxxxxxxx" <Gert.Havermann@xxxxxxxxxxx>, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 21 Jan 2014 02:30:30 -0800 (PST)
Hi Gert,
I have not placed any GND via around. Please suggest the method to calculate
the impedance of Differential via with GND via spacing, GND via size etc.,
Thanks,
Jack
On Tuesday, January 21, 2014 2:04 PM, "Havermann, Gert"
<Gert.Havermann@xxxxxxxxxxx> wrote:
How many GND vias are placed how close the signal via?
BR
Gert
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Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im
Auftrag von Jack Si
Gesendet: Dienstag, 21. Januar 2014 04:06
An: si-list@xxxxxxxxxxxxx
Betreff: [SI-LIST] Re: Methods to reduce SDD11
Hi Feng Wu,
I am doing the comparison of TDR and Frequency Domain Analysis. Can you suggest
for any Calculation method based on literature for an approximate correlation.
Hi Lyn Wang,
I am using a Blind via from Top to Layer 3. This differential signal is routed
in Layer 3, So there is no way for the stub. There are some dips at 2GHz,
4.2GHz and the SD11 reach the peak at 5GHz and 6.2GHz respectively.
Thanks,
Jack
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