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Keith Sabine

Improving Analog Design Time

Keith Sabine
vasanjk
vasanjk
7/23/2014 1:21:54 PM
User Rank
Master
Re: Topology on-the-go
Well said. Automation in design can get us to a certain level in the process in a shorter period of time, but, from then on, manual intervention and power of ingenuity is necessary to get the output.

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Vishal Prajapati
Vishal Prajapati
7/22/2014 8:36:55 AM
User Rank
Master
Re: Topology on-the-go
I don't have experience with IC physical layout design but I do have extensive experience with PCB design.

 

As far as my experience goes, I have seen the open source as well as most expensive software have in built auto routing capabilities. But none of them have given aesthetically good design. The autorouted design is no where good enough compared to manually routed designs.

 

I think this analogy will work in case of IC also. Auto routed layout will not be comparable to experienced manual layout. No matter how much rules we define for layout.

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vasanjk
vasanjk
7/18/2014 11:01:43 PM
User Rank
Master
Re: Topology on-the-go
"System Level Interplay"

Netcrawl

 

That's precisely my worry. Such high level integration takes the fun out of hands-on design. For a budding engineer, there is no necessity to understand how a simple quad op amp can be wired as an instrumentation amp. This kind of abstraction could kill the fun factor and,most importantly, could restrict fundamental understanding of the underlying principles.

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Netcrawl
Netcrawl
7/17/2014 4:55:44 AM
User Rank
Master
Re: Topology on-the-go
@Vasanjk, until now the design of analog has scarcely been automated at all, but as the cost of ASICs and SoCs grows, momentum is growing to bring analog into a new height- some sort of system-level interplay, which is now taking place betwwen software  development and hardware design tools.

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vasanjk
vasanjk
7/16/2014 10:21:19 AM
User Rank
Master
Re: Topology on-the-go
Keith

As the goal of every software automation is to provide a high degree of abstraction hiding the intricate details of the application, it makes sense to have templates which could be customized to a level while maintaining the simplicity.

 

Over time, one can master the art and create and share several custom made templates and share them across.

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Keith Sabine
Keith Sabine
7/16/2014 4:27:51 AM
User Rank
Newbie
Re: Topology on-the-go
Netcrawl, agreed than analog designers are generally happy to use tried and trusted methods in the main. Automation will never be a panacea for everyone, but as geometries go down the manual layout method is becoming increasingly time consuming due to rule complexity. It is here where automation can play a part in the overall design methodology.

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Keith Sabine
Keith Sabine
7/16/2014 4:11:44 AM
User Rank
Newbie
Re: Topology on-the-go
Vasanjk, good point. Adding custom topologies certainly makes sense. The implementation would be a tradeoff between complexity for the user (e.g. having to describe the topology by scripting) and flexibility. In the simplest case new topologies could be added directly to the tool. A more flexible approach might have the tool map a schematic topology to a custom pcell the user provides. Finally an API into the tool might allow a user to define a custom topology; this of course would require a good understanding of how the tool works, which would not be simple.

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samicksha
samicksha
7/15/2014 12:01:13 PM
User Rank
Artist
Re: Topology on-the-go
Blueprint or topology map is simply time saving, giving you enough time and space to analyze, even i have similar kind of questioncan we add custom design to it for personal referance and study.

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Netcrawl
Netcrawl
7/13/2014 5:00:29 AM
User Rank
Master
Re: Topology on-the-go
@Keith great post, thanks for that, there are many attempts at analog design, most have failed. analog systhesis is big disappointement, I think the problem here is that high performance physical design is inherently very demanding, it requires the designers to ddeal with multiple hierarchical symmeties- a huge daunbting task. Earlier analog technologies have not been able to manage and deal those complexities in a more effective way, they are not addressing technical issues.

To be successful an analog physical design technologies need to work closely with experienced analog designers, they need to know what exactly the designers need. Analog designers have historically not been interested to new tools and new approaches. 

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vasanjk
vasanjk
7/12/2014 8:49:39 PM
User Rank
Master
Topology on-the-go
Keith,

It is interesting to know that ready-made variants of possible topologies for a given design block can be changed on the fly and the right one could be chosen after careful analysis. This would save quite a bit of time. Is it possible to add custom topologies and add them to the list for future use?

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More Blogs from Keith Sabine
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