LTspice, a great program, but that UI! - Page 4

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Re: LTspice, a great program, but that UI!
On Mon, 13 Mar 2017 21:50:38 -0000, "Kevin Aylward"

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I expect that he has some stock options.


--  

John Larkin         Highland Technology, Inc

lunatic fringe electronics  


Re: LTspice, a great program, but that UI!
"John Larkin"  wrote in message  

On Mon, 13 Mar 2017 21:50:38 -0000, "Kevin Aylward"

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Probably, but company bosses are not necessarily known to be good the people  
that actually make them their money.

https://en.wikipedia.org/wiki/Bob_Widlar

"Talbert handling the fabrication and Widlar handling the design, they ruled  
the world and led the world in linear integrated circuits for a couple of  
decades."[

"Widlar and Talbert realized that the founders of Fairchild did not intend  
to share their windfall profits with the designers."

-- Kevin Aylward
http://www.anasoft.co.uk - SuperSpice
http://www.kevinaylward.co.uk/ee/index.html


Re: LTspice, a great program, but that UI!

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It depends entirely on the expected production volumes doesn't it? There
are also a lot of unique / niche parts.


--  

John Devereux

Re: LTspice, a great program, but that UI!


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Sure, but if it was unique to LT, then they would buy it because its unique  
to LT, LTSpice wouldn't matter .


-- Kevin Aylward
http://www.anasoft.co.uk - SuperSpice
http://www.kevinaylward.co.uk/ee/index.html


Re: LTspice, a great program, but that UI!

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Yes that is something of a side issue although for most of the "unique"
parts can be implemented with something else but may be more complicated
to design. But for specialist applications where volumes are lower I can
see the attraction of being able to drop in circuit block and have it
"just work", and furthermore be able to immediately demonstrate and
verify that with LTSpice.

Then if volumes of a high profit margin design do take off I can see it
being a while before a tried and trusted, yet relatively expensive part
is designed out.





--  

John Devereux

Re: LTspice, a great program, but that UI!



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But could you really sleep at night, knowing that you didn't even *try* to  
find another part? What if the engineer in the next cubicle decided to do  
so, and then showed to your boss that there was a better and cheaper part?

A key point is that LTSpice runs *any* PSpice/Spice3 model from any vendor,  
so its a pop to the competitions website to download their model and run it  
in LTSpice

The point being, LTSpice does not force, or ensure people use it to buy  
*only* LT parts. Its just a bit more, in your face advertising, and that his  
limited value to people like engineers, who almost invariable evaluate based  
on objective values.

My estimate is that LTSpice is used to buy more of other vendors products,  
then their own. LT parts are expensive.

-- Kevin Aylward
http://www.anasoft.co.uk - SuperSpice
http://www.kevinaylward.co.uk/ee/index.html


Re: LTspice, a great program, but that UI!
On Monday, March 13, 2017 at 10:26:48 AM UTC-7, Kevin Aylward wrote:
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It's not a sales tool, IMO, but a support tool.  Imagine that your job is to
answer the phone when people call with questions about one of your company's
hundreds of SMPS controllers.  Being able to say "Send us a simulation"
or "Check out this example" has got to be more or less priceless.

That'll be why they originally called it "SwitcherCAD."  It wasn't originally
meant to model opamps and 6L6s and stuff.

-- john, KE5FX

Re: LTspice, a great program, but that UI!
On Tue, 14 Mar 2017 17:26:44 -0700 (PDT), "John Miles, KE5FX"

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Or more importantly, avoid the calls entirely because the user can see
what's (not) happening.

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Re: LTspice, a great program, but that UI!
On Tue, 14 Mar 2017 17:26:44 -0700 (PDT), "John Miles, KE5FX"

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Most of the parts pages on the LT site have example LT Spice sims that
you can download and run instantly, and then modify for your
application.

Of course, you have to beautify them, too. They are usually very ugly.


--  

John Larkin         Highland Technology, Inc

lunatic fringe electronics  


Re: LTspice, a great program, but that UI!
On Sun, 12 Mar 2017 19:42:31 -0000, "Kevin Aylward"

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I would suggest that LTSpice gets LT repsonisble for a huge share of
its high margin business.  It's the way they support smaller companies
(where the margins are higher).  There is no other way to justify
their prices.

Re: LTspice, a great program, but that UI!
On Sun, 12 Mar 2017 20:15:18 -0400, snipped-for-privacy@notreal.com wrote:

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We had a team of LTC folks visit us last Wednesday, partly to tell us
about the expected effects of the ADI acquisition. They agreed with me
that LT Spice is going to be important to ADI, and that LT Spice has
probably sold gigabucks of parts so far.

Some of their parts are good deals. Not gumdrop opamps or regulators,
but things like fast ADCs and multi-channel serial DACs.

We've used thousands of their LTM micro-brick switchers. Nice quiet
little things.


--  

John Larkin         Highland Technology, Inc

lunatic fringe electronics  


Re: LTspice, a great program, but that UI!
On Sun, 12 Mar 2017 19:20:41 -0700, John Larkin

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Way too expensive.  When we can buy SMPS regulator chips for well less
than $.50 (and add another $.20 for passives), these sorts of things
don't hold the interest much.

Re: LTspice, a great program, but that UI!
On Sun, 12 Mar 2017 22:46:37 -0400, snipped-for-privacy@notreal.com wrote:

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"Expensive" depends on the context. They are small, convenient, and as
I noted, very quiet. Two inches away from a 250 MHz, 12 bit ADC, I
don't want a lot of switching spikes in my ground plane.


--  

John Larkin         Highland Technology, Inc

lunatic fringe electronics  


Re: LTspice, a great program, but that UI!
On Sun, 12 Mar 2017 19:58:33 -0700, John Larkin

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You've just stated my point about LTSpice, and LT in general.  Great
stuff, if you're making tens or hundreds a month.  Not so great if
you're making thousands or hundreds of thousands.  TI doesn't give
much support for people making tens or hundreds but...

It's a matter of market.  LTSpice allows LT to go after the high
margin business, where they want to play.  TI, for instance, has a
completely different marketing model.



Re: LTspice, a great program, but that UI!
On Sun, 12 Mar 2017 23:05:33 -0400, snipped-for-privacy@notreal.com wrote:

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If I post a question to one of the TI forums, somebody generally
answers it pretty promptly, and usually fairly well. I actually have
some support contacts at TI, but I think the forums work about as well
in most cases. My question and answer get googl indexed for the rest
of the world to see.

Distributor FAEs work for small companies too.

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Sure. We average about 20% overall parts cost compared to selling
price. Half of that is PC boards and packaging. So I don't worry much
about parts cost. I do use cheap TI synchronous switchers and external
Ls and Cs when it's reasonable, and when I have a lot of them on a
board.  

On a production run of, say, 50 or 100 pieces, it's good to minimize
the number of line items on the BOM. Every part has to be loaded into
feeders and such.

Hey, I use LT Spice for non-LT sims. UniversalOpamp2 is handy.


--  

John Larkin         Highland Technology, Inc

lunatic fringe electronics  


Re: LTspice, a great program, but that UI!
On Sun, 12 Mar 2017 21:47:42 -0700, John Larkin

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But you don't have four people dedicated to your business, one of whom
is an excellent power supply designer.  Do they come into Highland and
teach an eight week power design course?  ...and bring lunch?  ;-)

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Yes, that's *many* times our margin.  A buck matters.

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Sure.  The nuber of feeders is never a concern for our production (it
is for our CM but I never make it under their limit).  The number of
devices matters, of course, because it costs more to place a part than
most parts cost.

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;-)  

My favorite part is "ideal opamp".

Re: LTspice, a great program, but that UI!
On Mon, 13 Mar 2017 20:52:26 -0400, snipped-for-privacy@notreal.com wrote:

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Sometimes they take us out for sushi.

But I don't want a power design course, especially not eight weeks.
Even I can get tired of sushi.



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I use "e" for that.


--  

John Larkin         Highland Technology, Inc
picosecond timing   precision measurement  

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Re: LTspice, a great program, but that UI!
On Monday, March 13, 2017 at 9:15:43 PM UTC-4, John Larkin wrote:
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Yeah when is LT going to release "e" and how much is it? :^)
GH
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Re: LTspice, a great program, but that UI!
On Mon, 13 Mar 2017 19:20:24 -0700 (PDT), George Herold

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I like it because it doesn't need a power supply. Must be solar
powered or something.

What the difference between e and e2? Just polarity? The HELP doesn't
say.


--  

John Larkin         Highland Technology, Inc

lunatic fringe electronics  


Re: LTspice, a great program, but that UI!

On Sun, 12 Mar 2017 19:58:33 -0700, John Larkin

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This claim makes no sense. LTSpice is *only* a *simulation* program.  A  
simulation program can't "allow" them to sell parts.

LTSpice is, essentially, an advertising tool. It simply puts the name LT on  
the desktop. Sure, this has value, but purchasing departments don't buy  
parts based on simulating LT chips on a computer, its, does the part meet  
the performance required, at a cost I am willing to be, with an acceptable  
lead time .



-- Kevin Aylward
http://www.anasoft.co.uk - SuperSpice
http://www.kevinaylward.co.uk/ee/index.html


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