[SI-LIST] Re: PI Simulations in Hyperlynx
- From: Craig Harabedian <charabed@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Wed, 06 Mar 2013 14:15:35 -0600
Ravi,
I can guarantee that you will need some decoupling capacitors
especially if you are using an FPGA. The FPGA vendor should have
documents with recommendations (size, distance, capacitance, etc.) on
how to decouple the FPGA. Altera has a really nice spreadsheet based
calculator for their FPGA's decoupling network. Xilinx has some great
documents detailing the calculations involved.
-Craig Harabedian
On 3/6/2013 1:59 PM, Grasso, Charles wrote:
> Please contact their applications engineers.
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
> Behalf Of ravi_uni_pb
> Sent: Wednesday, March 06, 2013 9:09 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] PI Simulations in Hyperlynx
>
> Hello Everyone,
>
> I am new to PDN simulations therefore I need some help from you to simulate
> my board in hyperlynx. My board is designed to operate ADCs and DACs of 16bit
> at 250 MHz range for generic application (My board also includes FPGAs and
> other devices for data storage and retreival operations). Now I would like to
> do PI simulations to my board to find out if everything is alright. The
> following are some of the questions I have:
>
> 1) Attached are the results of decoupling wizard through lumped analysis. I
> am simulating for 1.2V power plane and would like to know if I need to add
> any decoupling capacitors. Can you guide me looking at the results what I
> need to do? Do I need to take care of those antiresonant peaks (@ around 5
> MHz)? Do I need to suppress them? Could you direct me to literature on this
> topic?
>
> 2) How to selected AC power pin model ? How to practically select the signal
> type and shape for an application. Can you give me any example or driect me
> to some sources?
>
> 3) How do I select the maximum frequency for control frequency sweep in
> decoupling wizard? (How do I find the bandwidth for my generic application?)
>
> 4) Is there any benchmark design available from hyperlynx with which I can
> learn PDN analysis at a good detail?
>
> Any help on to my questions or additional inputs on this topic are highly
> appriciated.
>
> Thanking you in advance,
> Ravi
>
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