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etnapowers
etnapowers
11/14/2013 9:49:39 AM
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Master
Re: Adequate testing
@DaeJ: I think that an automatic test tool is really useful for standard products, in case of products having new features or technologies a customized test tool is required.

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DaeJ
DaeJ
11/13/2013 9:53:47 PM
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Master
Re: Adequate testing
I guess that automatic testing tool might be helpful for small company. Testing procedure will be process inside tool to debug the circuit or IC. For example, robotic based vision system would be installed on top of IC as part of testing. These tools might be available for rent.   

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amrutah
amrutah
11/13/2013 3:47:45 PM
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Master
Re: Adequate testing
@etnapowers:

     Actually for smaller companies, having a refeence design in their kitty is a big advantage when it comes to selling a product.  They can better estimate the BOM, the duration or time-to-market of the next-gen product. As you mentioned "through testing and proper understanding of the application specifications" should immensely help them use the Reference designs.

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amrutah
amrutah
11/13/2013 3:28:55 PM
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Master
IC Design
When it comes to selling chipsets having a working reference design is a big deal in winning a customer, but as Bill rightly put it, "Strong Start, but Weak Finish"-the engineer has to seriously understand the conditions/requiremtns of the applications before using it.

The problem in understanding all the conditions of a reference design largely also depends whether the original IP designer is still available to provide the insights.

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etnapowers
etnapowers
11/13/2013 6:46:10 AM
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Master
Re: Passive components
@samicksha: You're welcome. As you correctly said , temperature affects resistivity, I want to add that temperature affects also reliability. Some components have reliability issues that other components, coming from a different vendor, don't have.

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samicksha
samicksha
11/13/2013 4:53:11 AM
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Artist
Re: Passive components
@etnapowers: Thanx for summary, and that covers all, cross-sectional area, and resistivity of the conductor, temperature affects resistivity.

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eafpres1
eafpres1
11/13/2013 12:57:13 AM
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Blogger
Helping chipset guys with their reference designs
OK, so my last reference design story dates to the same early days of 802.11b.  There was an explosion of chip vendors trying to get business with comptuer and accessory OEMs.  Pretty much all those vendors were in Taiwan.  Most of them wanted a PCMCIA reference design since that was the hot form factor.  I spent collectively a month or so in Taiwan on multiple visits marching from vendor to vendor trying to get on their reference designs with my antennas (we had a SMT antenna for 2.5 GHz).  This required educating group after group about antenna matching, layout, gain, patterns, etc.  My design group did huge amounts of work taking circuit boards from these chip guys, and dealing with whatever layout they had done and whatever room they had left us to locate and get to work the antennas.

The good news is we eventually sold a lot of those SMT antennas, and they are still in production today, even though I'm long gone.

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eafpres1
eafpres1
11/13/2013 12:51:56 AM
User Rank
Blogger
Switch parts at your peril
A long time ago in another life my group designed antennas and antenna solutions.  We had a particularly challenging design in the very early days of 802.11b for a PCB antenna design that worked on a PCMCIA card WiFi adaptor.  Yes, it was so long ago that PCMCIA slots were widely used on laptops and laptops didn't have WiFi built in so companies made money selling PCMCIA WiFi plug-ins.

Well, on that board were two large value inductors.  We made a serious error (when I say we, I mean I) by allowing sourcing to change the vendor of the inductor for production.  When the customer got the first production parts they didn't work as expected.  It was traced to the change in the non-inductive properties of the inductor.  Very painful lesson, which supports your point about needing to know other parameters for all the components before you start switching things out.

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eafpres1
eafpres1
11/13/2013 12:46:39 AM
User Rank
Blogger
Reference Designs sought after by component suppliers
@Bill--reference designs are an interesting part of the value chain in the electronics industry.  Consider a passives component company.  There isn't a lot to differentiate much of your product line.  So they often work hard to get onto that reference BOM, because it definitely increases their chances of being on the first customer design, which definitely increases their chances of being on the first production release.

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etnapowers
etnapowers
11/12/2013 11:38:41 AM
User Rank
Master
Adequate testing
"Just because you see the design in an application note doesn't mean that it was actually built, nor that it was adequately tested"

I believe that this depends on the vendor, normaly big companies guarantee a complete debugging and testing of the products that they sell, for small vendors the situation is a little bit different: a not adequate testing or debugging is not impossible. 

 

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