[SI-LIST] Re: Why PDS impedance exceeds target impedeance in low frequency less than 1kHz is OK ?
- From: "韩国兵" <han.guobing@xxxxxxxxx>
- To: "icer world" <icermail@xxxxxxxxx>
- Date: Thu, 13 Mar 2008 10:41:44 +0800
Hi icer,
Can you tell me whether the state of your ball side is short or open
when you calculate the PDS impedance? If open it may be ok, else it depends.
For example, for the clock signals, the spectrum is discrete and
1kHz may much lower than the first order harmonic, that is 1/T.
Regards,
Robin
2008/3/4, icer world <icermail@xxxxxxxxx>:
>
> It's said that PDS impedance exceeds target impedeance in low frequency
> less than 1kHz is OK , can anyone give me some explains?Thanks!
>
>
>
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