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Brad Albing
Brad Albing
6/24/2013 5:47:27 PM
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Re: GPU Based SPICE revisited
@Brian >> ...they could not target this to small analog and MS contant as well, such as SerDes, PLLs etc. Somebody (one of you guys, not me) should write about how this might be applied, hypothetically, in the manner described. Interesting, but presently beyond my reach.

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analoging
analoging
6/18/2013 8:59:15 PM
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investment into software companies
Venture capitalists tend to prefer investment into software (ie EDA IC) companies over capital-intensive companies in general such as ones requiring fabs or clean rooms. It is a lot less risky of a gamble. Software companies have higher profit margins and lower revenues though as a result of their business models.

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analoging
analoging
6/18/2013 8:55:19 PM
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multi-patterning for ICs
EDA companies are devising ways to shrink microchip node sizes down to 10 or less nm. Current DUV immersion photolithography is not capable of directly printing these feature sizes. A technique called double patterning which I helped patent at Micron is being stretched into what is now known as tripled patterning to obtain successive shrinks.

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Brian Bailey
Brian Bailey
6/17/2013 5:49:05 PM
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Re: GPU Based SPICE revisited
@Scott - the key piece is where they say that they rely on all of the GPUs sharing the same design image which means that each replication does not need memory for a separate image of the design. You also correctly state that at the mment they are targetting this at the digital market where there are replicated cells, such as memory cells, standard cells etc. However, I see no reason why,  in the future, they could not target this to small analog and MS contant as well, such as SerDes, PLLs etc. Of course the future does not always mimic the past.

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Scott Elder
Scott Elder
6/17/2013 4:13:13 PM
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GPU Based SPICE revisited
Here is a paper from a few years ago.

http://www.ece.tamu.edu/~sunil/projects-web/papers/kanu-cktsim.pdf

I wonder how the new approach achieves 50x if the guys that wrote this paper could only realize about 2.8x using GPUs.

Probably based upon modeling at the next higher level of a system and thereby reducing the size of the SPICE matrix.  But that benefit depends upon a circuit having multiple replicated cells.  Sounds like digital more than analog??

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