EAGLE Netlist conversion

"The Real Andy" <.pearson@wayit_dot_com_dot_au_remove_the_obvious_to_reply>
wrote in message news:dedab0ptb4fk3n4mhfhh51pti30f9o52ov@4ax.com...
On Wed, 26 May 2004 12:06:19 -0700, "Richard Henry" <rphenry@home.com
wrote:

%

When rewriting, I often leave the previous code in place behind comment
separators, with a short explanation of what problems it cause, unless
the
error is something small in size like an incorrect index, or mispelled
word.


This is not possible in some of the projects i've worked on. Leaving
in unused sections of code makes the source bloated and harder to
read. Using good source control eliminates the need to leave unused
code behind.
Click to expand...
"Bloated"? You must have a lot more errors than I do.


>
 
"Richard Henry" <rphenry@home.com> wrote in message
news:pU5tc.35689$PU5.16018@fed1read06...
"Mike" <mike@nospam.com> wrote in message
news:1pz5ltmxjxf0.by92z1jx1esz$.dlg@40tude.net...
On Tue, 25 May 2004 16:20:40 -0500, Dave VanHorn wrote:

Keeping the comments in sync with the code is harder.

A former coworker offers that as a reason that no code should be
commented.
Since the comments won't be updated, a large percentage of them will be
wrong, and the comments will be worse than no comments at all.

I don't buy it. I write my code and my comments at the same time, or in
the
case of a rewrite, I rewrite and recomment at the same time.

When rewriting, I often leave the previous code in place behind comment
separators, with a short explanation of what problems it cause, unless the
error is something small in size like an incorrect index, or mispelled
word.

I commonly do this when customizing resource files in Linux -
Click to expand...
leave the old stuff, but commented out, for reference, to give me
another tool when I screw up. :)

Cheers!
Rich
 
Is there any chance that I can persuade you fellows to add
[OT] to the subject line? You don't have to, of course; this
is just a polite request...
 
"L.W." wrote:

My design program does not have a speaker model. I am using Multisim
2001. Could someone tell me how to simulate the electrical properties
of a speaker (i.e. impedence, inductuance) and how to do this with
just basic components I would be grateful.
Click to expand...
Here is an example of a SPICE model that very accurately mimics
measurement. It is for a speaker with both an actively driven cone and
a passive radiator cone.

First some definitions (skip down for a quick peak at the results).

Bl Electromechanical motor constant of the voice coil - this factor
depends on magnet strength, gap geometry and turns in the coil.
It relates coil displacement force to coil current (newtons/amp).

Rvc Rvc is the dc resistance of the voice coil. Rvc1-3 account
for the frequency dependent increase in resistance due to eddy
current losses in the voice coil and surrounding pole pieces.

Lvc Voice coil inductance - decreases with increasing frequency due
to flux squeezing resulting from eddy currents.

Les Cone suspension compliance equivalent inductance: Les = Cm*(Bl)^2
Cm is the mechanical compliance in m/N.

Cem Cone mass equivalent capacitance: Cem = Mm/(Bl)^2
Mm is the mechanical mass in kg.

Res Cone suspension loss equivalent resistance: Res = (Bl)^2/Lm
Lm is the mechanical losses in inverse seconds.

Fa Acoustic output factor - goes up with cone area and motor
efficiency and goes down with cone mass, but has almost no
effect on electrical impedance.

Note: RLesa and RLesp are added to avoid convergence problems with
SPICE and Ro allows summing the current dependent current sources that
model the acoustic output factor of the two cones in the system.

WARNING! Ascii Art. Requires a fixed width font.
Click to expand...
The Model:

/ Voice \ / Active \ Air in / Passive \
/ Coil \ / Piston \ Box / Piston \

Rvc Lvc0 Leb
o--./\/\/`--+--@@@@--+-------+-------+--@@@@@--+-------+-------+
3.8 | 4.5m | | | 62m | | |
/ | | | | | |
Rvc1 \ | | | RLeb | | |
3 / | | +-./\/\/`-+ | |
| Lvc1 | | | 200 | | |
+--@@@@--+ | | | | |
| 3.0m | | | | | |
/ | | | | | |
Rvc2 \ | | | | | |
15 / | | | | | |
| Lvc2 | Cema | (@ Lesa | Cemp | (@ Lesp
+--@@@@--+ === (@ | === (@
| 2.0m | 0.5m | (@ 200m | 1.5m | (@ 110m
/ | | | | | |
Rvc3 \ | | | | | |
75 / | | / / | /
| Lvc3 | | \ RLesa \ Resp | \ RLesp
+--@@@@--+ | / 1m / 80 | / 1m
1.3m | | | | | |
/ | +---+ | | +---+
Resa \ Faa | ,!. | | Fap | ,!. |
90 / ( I ) | | ( I ) |
| 588m | `+' | | -235m | `+' |
| | | | | | | |
o------+-------------+-------+---}---+----+----+-------+---)---+
_|_ | / |
/ / / Acoustic | Ro \ 1 ohm |
Output | / |
Vo o--+--------+----------------+



The Results:
Speaker Impedance

100 +-----------+-----------+-----------+-----------+
| ' | ' | ' | ' |
| ' | | | ' | ' _|
ohms | - - + - - | ! - l - | - - + - - | - - + _," |
| ' | l ; : | ' | _,-" |
| ' |; : ; ` | ' _,-" ' |
10 +-----------+--\-;---\--+-------_,-" -----------+
| ' _/| v ' \ | _,-" | ' |
|~----**"" | ' "*--" ' | ' |
ohms | - - + - - | - - + - - | - - + - - | - - + - - |
| ' | ' | ' | ' |
| ' | ' | ' | ' |
1 +-----------+-----------+-----------+-----------+
1Hz 10Hz 100Hz 1kHz 10kHz


Acoustic Output

1V +-----------+-----------+-----------+-----------+
| ' | ' | ' | ' |
| ' | ' _.--.._ ' | ' |
100mV | - - + - - | - -__.-"- | - -`+~._- | - - + - - |
| ' | / ' | ' `~~..__ ' |
| ' | ; ' | ' | `~~..__|
10mV +-----------+-y---------+-----------+-----------+
| ' | | ' | ' | ' |
| ' __| ; ' | ' | ' |
1mV | - - -,-" \/- - + - - | - - + - - | - - + - - |
| _,-" | ' | ' | ' |
| / ' | ' | ' | ' |
0.1mV +"----------+-----------+-----------+-----------+
1Hz 10Hz 100Hz 1kHz 10kHz


Manufacturers sometimes give some basic info about the driver's
physical characteristics that can be useful to start the modeling
process, but this example was taken from my work from a several years
ago with a prototype subwoofer amplifier that I was then developing.

One gets in the ballpark by starting with the parameters from any
model of a vaguely similar speaker, or by calculating the first cut
parameters from the equations. After that, it is not too much trouble
through trial and error to adjust the parameters to get a near perfect
fit to measurements.

I measured the proto subwoofer's impedance and response on an Audio
Precision analyzer and went looking for a way to model it so I could
simulate an equalization scheme that used positive feedback of coil
current. Almost all of the models I found were set in the acoustical-
mechanical domain and didn't capture actual performance all that well
anyway. So I came up with a much more EE friendly model to match the
data.

Richard Pierce was/(is?) somewhat of a speaker/audio guru who
occasionally posted (to the pro audio newsgroups) good technical
information on the subject of loudspeaker modeling. Access his posts
via a Google newsgroup advanced search for the terms +speaker +model
and where the author is Richard Pierce. -- analog
 
David Sutherland wrote:

One of you is enough - you're in the bit bucket. <flush
Click to expand...
Your krillfile is fucked...

David Sutherland wrote:
On Mon, 21 Jun 2004 21:32:53 GMT, "Diogenes"
diogenes@crete.org.net.com> wrote:

David Sutherland wrote:

He doesn't have the balls to present a real email address,

His email address is in every one of his posts. You seem angry about
something.

Try mailing him at his "nospam" address - see how far you get.
Click to expand...
Ok, so you really are so pathetically stupid that you can't even send a
simple email. Are you a linuxfuck as well, you dumb cunt?

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From: "Kadaitcha Man" <nospam@rainx.cjb.net>
To: <nospam@kadaitcha.cx>
Subject: Is David Sutherland is a fuckwit?
Date: Tue, 22 Jun 04 06:25:27 +0545
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Status:

Yes, David Sutherland is a fuckwit.
 
David Sutherland wrote:

One of you is enough - you're in the bit bucket. <flush
Click to expand...
Your krillfile is fucked...

David Sutherland wrote:
On Mon, 21 Jun 2004 21:32:53 GMT, "Diogenes"
diogenes@crete.org.net.com> wrote:

David Sutherland wrote:

He doesn't have the balls to present a real email address,

His email address is in every one of his posts. You seem angry about
something.

Try mailing him at his "nospam" address - see how far you get.
Click to expand...
Ok, so you really are so pathetically stupid that you can't even send a
simple email. Are you a linuxfuck as well, you dumb cunt?

Received: from kadaitcha.cx (root@localhost)
by kadaitcha.cx (8.11.6/8.11.6) with ESMTP id i5M1CIb12931
for <nospam@kadaitcha.cx>; Tue, 22 Jun 2004 11:14:18 +1000
X-ClientAddr: 168.143.113.18
Received: from mail.cyberpass.net [168.143.113.18]
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From: "Kadaitcha Man" <nospam@rainx.cjb.net>
To: <nospam@kadaitcha.cx>
Subject: Is David Sutherland is a fuckwit?
Date: Tue, 22 Jun 04 06:25:27 +0545
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Status:

Yes, David Sutherland is a fuckwit.
 
Wow, it does impersonations, too. Was I supposed to be impressed?


Regards,
David Sutherland
(note **ANTI-SPAM** in reply field)
 
David Sutherland wrote:
Wow, it does impersonations, too. Was I supposed to be impressed?
Click to expand...
Because I want you to know that I was really impressed. Feeble minds
like mine are easily impressed by the most mundane of things.

Regards,
David Sutherland
(note **ANTI-SPAM** in reply field)
 
David Sutherland wrote:
David Sutherland wrote:
Wow, it does impersonations, too. Was I supposed to be impressed?

Because I want you to know that I was really impressed. Feeble minds
like mine are easily impressed by the most mundane of things.

Regards,
David Sutherland
(note **ANTI-SPAM** in reply field)
Click to expand...
I can tell them apart easily. In that thread of three, the first and last
were articulate.

HTH & HAND

--
Diogenes
 
Diogenes, the double-faced, hacking foghorn wrote:
Diogenes wrote:
David Sutherland wrote:
David Sutherland wrote:
Wow, it does impersonations, too. Was I supposed to be impressed?

Because I want you to know that I was really impressed. Feeble minds
like mine are easily impressed by the most mundane of things.

Regards,
David Sutherland
(note **ANTI-SPAM** in reply field)

I can tell them apart easily. In that thread of three, the first and
last were articulate.

snort

BWHAHAHAHAHAHAH!!!
Click to expand...
<snigger> *vbg* You obviously got it.

--
Diogenes
 
<newsgroups untrimmed from advocacy>

David Sutherland wrote:
I don't think
Click to expand...
That, unfortunately, is the harsh reality that is my existence.


Regards,
David Sutherland
(note **ANTI-SPAM** in reply field)
 
David Sutherland wrote:
Wow, it does impersonations, too. Was I supposed to be impressed?
Click to expand...
Being impressed implies one or both of two prerequisites. A brain and/or a
steamroller.

London to a bucket of pig drool says you don't own a steamroller.
 
Diogenes wrote:
David Sutherland wrote:
David Sutherland wrote:
Wow, it does impersonations, too. Was I supposed to be impressed?

Because I want you to know that I was really impressed. Feeble minds
like mine are easily impressed by the most mundane of things.

Regards,
David Sutherland
(note **ANTI-SPAM** in reply field)

I can tell them apart easily. In that thread of three, the first and
last were articulate.
Click to expand...
<snort>

BWHAHAHAHAHAHAH!!!
 
On Fri, 09 Jul 2004 06:03:29 GMT, "Kevin Aylward"
<salesEXTRACT@anasoft.co.uk> wrote:

Resistance is futile.

It makes no real business sense for a company to continue to support two
products like this. they aint goanna change their mind on this one
Click to expand...
Can you suggest an alternative simulation package for the serious
electronic designer, Kev? LT springs to mind, but do you know of any
others worthy of recommendation?
--

"What is now proved was once only imagin'd." - William Blake, 1793.
 
Paul Burridge wrote:

On Fri, 09 Jul 2004 06:03:29 GMT, "Kevin Aylward"
salesEXTRACT@anasoft.co.uk> wrote:


Resistance is futile.

It makes no real business sense for a company to continue to support two
products like this. they aint goanna change their mind on this one


Can you suggest an alternative simulation package for the serious
electronic designer, Kev? LT springs to mind, but do you know of any
others worthy of recommendation?
Ah Paul, it isn't the similator that's the problem, it is the front end.
Click to expand...
Jim has a copy of LTSpice, but he REALLY, REALLY, REALLY LIKES the
PSpice Schematics front end. He can continue to use his existing
Schematics for a while, but if he upgrades to a later version of the
simulator, he is going to have to manually run the simulations instead
of running them from Schematics. He, reasonably, would prefer not to go
through this pain. I fully understand, and sympathize... :-(

--
Charlie
--
Edmondson Engineering
Unique Solutions to Unusual Problems
 
Jim Thompson said:
If you are a PSpice Schematics User you need to be aware that Cadence
and EMA-EDA will discontinue support of PSpice Schematics at the 10.05
Release.

You will then be forced to use (gag me with a spoon) OrCAD Capture.
Click to expand...
Aaaaaarrrrggghh... this eliminates OrCAD/PSpice as the EDA program I would buy.

(I've used Capture. I've liked it, just I can't get used to it! :/)



[]s
--
Š Chaos Master. |"These wounds won't seem to heal
Posting from Brazil. | This pain is just too real
http://marreka.no-ip.com | There's just too much that time can't erase"
(most often offline... ) | -- Evanescence, "My Immortal"
 
Paul Burridge said:


Can you suggest an alternative simulation package for the serious
electronic designer, Kev? LT springs to mind, but do you know of any
others worthy of recommendation?
Click to expand...
I am not Kev, but I suggest SIMetrix.
I have been testing the Intro version, it seems quite good.

PS: I have NO, ZERO, NOPE, 0, 0e+0, 0d0, NINGUNA, NENHUMA, NULL, 0.00000000
relation to Catena Software.

[]s
--
Š Chaos Master. |"These wounds won't seem to heal
Posting from Brazil. | This pain is just too real
http://marreka.no-ip.com | There's just too much that time can't erase"
(most often offline... ) | -- Evanescence, "My Immortal"
 
Paul Burridge wrote:
On Fri, 09 Jul 2004 06:03:29 GMT, "Kevin Aylward"
salesEXTRACT@anasoft.co.uk> wrote:

Resistance is futile.

It makes no real business sense for a company to continue to support
two products like this. they aint goanna change their mind on this
one

Can you suggest an alternative simulation package for the serious
electronic designer, Kev? LT springs to mind,
Click to expand...
As you are probably about the furthest away from being a "serious
electronic designer" in these NGs, what springs to your mind on this
matter is about as valid as John Travolter's on the correctness of
Scientology.

Kevin Aylward
salesEXTRACT@anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.
 
On Sat, 10 Jul 2004 07:15:24 GMT, "Kevin Aylward"
<salesEXTRACT@anasoft.co.uk> wrote:

s you are probably about the furthest away from being a "serious
electronic designer" in these NGs, what springs to your mind on this
matter is about as valid as John Travolter's on the correctness of
Scientology.
Click to expand...
You spelled it wrng agan Kevin. www.travolta.com

But with a quick glance, I didn't see any links to the scientology.

Maybe you know in general about the scientology, though? How does it
compare with atheism?
 
xray wrote:
On Sat, 10 Jul 2004 07:15:24 GMT, "Kevin Aylward"
salesEXTRACT@anasoft.co.uk> wrote:

s you are probably about the furthest away from being a "serious
electronic designer" in these NGs, what springs to your mind on this
matter is about as valid as John Travolter's on the correctness of
Scientology.

You spelled it wrng agan Kevin. www.travolta.com

But with a quick glance, I didn't see any links to the scientology.
Click to expand...
Try "+travolta +scientology".

e.g. http://www.rickross.com/reference/scientology/scien322.html?FACTNet

Maybe you know in general about the scientology, though?
Click to expand...
Yep. Its complete crap.

How does it
compare with atheism?
Click to expand...
What?

Kevin Aylward
salesEXTRACT@anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.
 
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