Ian,
A tragic example of poor documentation augmented by no budget for
simulation is NASA's loss of the last two Mars explorers. The most
recent of these monumental embarrassments would never have happened if
someone had bothered to simulate the entire flight (especially the
boundary points,
[EMAIL PROTECTED]
To: Protel EDA Forum [EMAIL PROTECTED]
Sent: Tuesday, July 02, 2002 8:00 PM
Subject: Re: [PEDA] SPICE sim question
* Tracking #: 06D379F98D4AAE4FA0D5B6A107F024B64FCBD31E
Subject: Re: [PEDA] SPICE sim question
Straight-A students, indeed...!? Long ago, when I was first introduced
to
computer simulation tools, I was forewarned: A fool with a tool is
still
a
fool.
True, and when the tool is a computer, the fool has an electrified
fooling
machine.
Don't get me
Afshin Salehi wrote:
Just out of curiosity, what types of things do you guys run simulations on?
What drives you to run a simulation on that specific device? How accurate
is the simulation to a real world bread boarded device?
Jon Elson said it takes a day at first then maybe an hour or so
, July 03, 2002 3:26 PM
Subject: Re: [PEDA] SPICE sim question
* Tracking #: E3FDD68D144DA54E9AB577B6A142C63A01A740D4
Mira,
The few good designers I have know in my 25 years of design *always*
simulate their designs. Engineers who cannot design a functioning
product without a simulator shouldn't be engineers in the first place.
However, every engineer that takes simulation seriously can *improve*
any design
, MSEE
http://www.gigahertzelectronics.com
- Original Message -
From: Gary Packman [EMAIL PROTECTED]
To: Protel EDA Forum [EMAIL PROTECTED]
Sent: Tuesday, July 02, 2002 5:54 AM
Subject: Re: [PEDA] SPICE sim question
Mira,
The few good designers I have know in my 25 years of design
I use simulation for a couple of reasons.
Last year I was given and existing design that didn't work. i found a few
problems like op amps going into saturation and taking way too long to recover.
In order to develop a fix I used simulation to determine if the voltage limiter
would effect the
PROTECTED]
Sent: Tuesday, July 02, 2002 5:54 AM
Subject: Re: [PEDA] SPICE sim question
Mira,
The few good designers I have know in my 25 years of design *always*
simulate their designs. Engineers who cannot design a functioning
product without a simulator shouldn't be engineers in the first
Gary,
I agree with all you said here.
I've seen a lot, believe me. I know and I'm working on
projects that work well and are not simulated at all.
I've seen also devices that were built on simulated
circuits and didn't perform well.
I've seen also a satellite receiver built in Bulgaria
15 years
to
point out that the schematic had an error ;)
Best Regards,
Matt Tudor , MSEE
http://www.gigahertzelectronics.com
- Original Message -
From: Bagotronix Tech Support [EMAIL PROTECTED]
To: Protel EDA Forum [EMAIL PROTECTED]
Sent: Tuesday, July 02, 2002 10:33 AM
Subject: Re: [PEDA] SPICE
I would do more simulation if there were more and better models for the
chips I want to use. Also, if the simulator software was easier to use
(not
talking about just Protel here).
Or at least well documented ( even just adequately documented ;-)
Anybody know of a good reference book which
One more detail on this.
If the problem is not with an error in the schematic,
it crashes when different simulated parts of the
schematic are merged. Most designers neglet the
interconnections, which might cause significant loss
of signal or changes of the characteristics of the
load.
Of course
,
Fred A Rupinski
- Original Message -
From: Bagotronix Tech Support [EMAIL PROTECTED]
To: Protel EDA Forum [EMAIL PROTECTED]
Sent: Tuesday, July 02, 2002 10:33 AM
Subject: Re: [PEDA] SPICE sim question
I would do more simulation if there were more and better models for the
chips I want
On 12:02 PM 2/07/2002 -0400, mariusrf said:
I still have memories of some analog switching done with bipolars , only
using reverse saturation (collector reversed with emmitter - picture a npn
with the emmitter tied at a more positive potential than the collector) .
The trick was yielding lower
Corporation, PC's weren't invented yet.
Matt Tudor , MSEE
http://www.gigahertzelectronics.com
- Original Message -
From: Ian Wilson [EMAIL PROTECTED]
To: Protel EDA Forum [EMAIL PROTECTED]
Sent: Tuesday, July 02, 2002 8:08 PM
Subject: Re: [PEDA] SPICE sim question
On 12:02 PM 2/07/2002 -0400
in the
end but my
understanding is usually much better than if I had
just done a rough
design and built it.
Cheers, Hugh.
-Original Message-
From: Mira [mailto:[EMAIL PROTECTED]]
Sent: Sunday, June 30, 2002 10:11 AM
To: Protel EDA Forum
Subject: Re: [PEDA] SPICE sim question
PROTECTED]]
Sent: Sunday, June 30, 2002 10:11 AM
To: Protel EDA Forum
Subject: Re: [PEDA] SPICE sim question
Nice and true thoughts, Gary.
It all depends on:
1. How experienced you are when doing and debugging
your designs.
2. How experienced you are with the simulation tools.
Mainly analog
Afshin Salehi wrote:
Just out of curiosity, what types of things do you guys run simulations on?
Amplifiers, linear and switching power supplies, filters, and just about
anything else that will need tweaking on the bench.
What drives you to run a simulation on that specific device?
Nice and true thoughts, Gary.
It all depends on:
1. How experienced you are when doing and debugging
your designs.
2. How experienced you are with the simulation tools.
Mainly analog specialists go for this.
Good designers rarely simulate their circuitry, while
newbies start with it to see the
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