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WKetel
WKetel
6/27/2013 11:51:29 AM
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Artist
Re: Capturing the curves to be tables. A problem, it seems
Via Man, you are right. It is important to keep those limitations in mind.

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Via Man
Via Man
6/27/2013 8:13:07 AM
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Blogger
Re: Capturing the curves to be tables. A problem, it seems
@WKetel - You make good points. A model created with curve tracing is certainly no more accurate than the curved used for tracing. And, such a model may or may not comprehend extreme corner cases. The ViaDesigner model generator is a fast, easy and reasonably accurate way to generate an initial high-level model. You are right, this type of model should not be considered as a golden, sign-off ready model but such models are very handy when you don't have a model that even approximates the behavior you are looking to simulate.

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WKetel
WKetel
6/26/2013 8:41:05 PM
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Artist
Capturing the curves to be tables. A problem, it seems
I see a problem with generating a table or equation from a printed curve, or perhaps any curve that has existed as a PDF file. That problem is distortion and inaccuracy. In addition those curves may not accurately match real operation at extreme conditions. And once again, the results of a simulation are usually no more accurate than the input data and the simulation model.

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Brad Albing
Brad Albing
6/24/2013 2:26:54 PM
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Blogger
Re: 3D Printer for Silicon
@Via Man - you're right, at that price and that time frame for delivery of parts, that would be pretty cool.

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Via Man
Via Man
6/24/2013 10:50:49 AM
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Blogger
3D Printer for Silicon
@Brad - "Desktop-like 3D printing" of analog chips seems a bit far off (for now, I know you were joking). We do want to provide software tools and configurable analog technology that makes analog integration as easy, affordable and timely as printed circuit board design.
  • If you could design a mixed-signal circuit on your desktop
  • Simulate the design
  • Auto place and route the analog and digital
  • And, have prototypes fabricated in 4 weeks
  • For a few hundred dollars per prototype

That would be pretty cool.

We just want to be the "3D Printing of Analog Chip Design Company"

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Brad Albing
Brad Albing
6/20/2013 1:12:20 PM
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Blogger
Re: Napkin to model
@eafpres - Now we need that desktop 3D printer we discussed in another blog comment thread a few weeks ago so we could go from napkin sketch to device.

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Vishal Prajapati
Vishal Prajapati
6/20/2013 6:46:13 AM
User Rank
Master
Re: SPICE Models
This can be a ice breaking tool for the simulation softwares. We never had this kind of freedom and ease to work with simulation models. Manual work can take up long hours to make a similar model.

 

The same functionality should be available with SPICE also. And again scope of improvement will always be there in all the products, but having a breakthrough like this is a definite welcom.

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DaeJ
DaeJ
6/19/2013 11:57:22 PM
User Rank
Master
Re: Napkin to model
 Long time ago, I was told that owner's major was mechanic engineering.  He invented model in the Napkin and calculated all dynamic behavior based on thermal dynamic theory. Now, he is CEO in the company that a few thousand employees are working.

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Via Man
Via Man
6/19/2013 8:02:18 PM
User Rank
Blogger
Re: Nice input, but suggestion
@RedDerek - 

1) Great idea on the cross-hair type cursor. Might be nice to have a cursor that spanned all the way the the x & y axes & showed the x&y value at the cursor...

2) Yes, you can enter different data at different temperatures. This is the multi-port model with one of the inputs being temperature that selects the appropriate temperature curve. This other input can also be some curve selecting paramater other than temperature.

3) Yes, you can us this kind of curve tracing for BJT, MOFSETs and other active devices. If it gets too complex a model should probably be hand coded but this is a great way to create a simple table or curve-trace model for parts "not in the library."

The generated models will work in any VHDL-AMS compliant simulator.

Tool isn't online at the present time. At present, ViaDesigner is a PC desktop tool.

Design and model sharing is supported at community.viadesigner.com.

 

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eafpres1
eafpres1
6/19/2013 7:19:48 PM
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Blogger
Napkin to model
It is interesting how rare a good UI capability is to simply draw the behavior and capture it as a model (table).  Recently I was doing some work on dynamic simulation models, mainly for business analysis, although in principal the tools could be used for anything.  I used a very simple web-based tool that had this feature.  You could just draw a dynamic behavior and it would store it in a table.  You could edit and fine tune it.  You did not need a closed for equation or set of equations.

How many times have you been talking over your favorite adult beverages when someone draws a response curve on a napkin and says something like "if I could get that I would buy a milliion of them"?  Now at least you can get that into a simulation post-haste to see if it would be well behaved with the rest of the circuit.

Now, if you could just give us a tool that takes that parametric sketch on a napkin and designs the corresponding analog part...

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