EAGLE Netlist conversion

Jim Thompson · May 18, 2005

On 18 May 2005 16:44:32 -0700, "Chris" <ntyangiri@gmail.com> wrote:

There is no class,
Don't be rude.
Thats why I'm asking here about the standard methods for Analysis of a
Comparator.
If you give me a simple answer you could be of help.
Look I never had good access to classes as you might have had.
BTW I live in far East

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Peter Bennett · May 19, 2005

On 18 May 2005 14:35:52 -0700, bill_hale@agilent.com wrote:

I was using IVEX. It was OK.

I'm looking for something to draw schematics, not
necessarily PC related.

The ideal program would handle wiring harnesses and connectors
& switches really well--from a library. It would be easy to label
stuff.

I don't need PCB layout. I might want to draw an occasional electronic
schematic, tho. I don't even need connectivity lists.

If you don't need netlists or PCB layout, then most any general CAD
program would do - a cow-orker frequently uses AutoCad for schematics
and wiring diagrams because he also uses it for mechanical drawing. I
tend to use Protel (a professional electronic CAD program) for
anything vaguely electrical, because I also use it for schematics
leading to PC boards - but the electronics features are not needed for
simple wiring diagrams.

All you really need is a drawing program that allows you to create
symbols or blocks that you can re-use - so you don't have to re-draw a
switch or resistor from scratch every time you need one. Many
drafting programs will include a library of electrical/electronic
symbols.

--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
new newsgroup users info : http://vancouver-webpages.com/nnq
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca

Andrew Tweddle · May 20, 2005

Etantonio wrote:

Good Morning,
I've a Gericom Webshox laptop, it is of 2001, I changed the battery
but it is still not working, the problem seems to be that the 15 volts
coming from power supply don't reach the battery, they seems stopped
from an 8-pin dual in line IC named 4431 1503 that I don't know who is
the manufacturer, I search for it on internet but with no results.
To solve the problem I need the following information :

1) Who is the producer of this IC 4431 1503 or equivalent, it have
4431 in the first line, a little delta on the second line and
following 1503
2) where I can find the schematic of the motherboard N241S1 ver:0.1
possible for free

Many thanks for your help

Antonio D'Ottavio
etantonio@etantonio.it
Could be an SO-8 FET like FDS4431 from fairchild or IRF4431 from

International Rectifier.

regards Andrew

Rob Gaddi · May 20, 2005

Chris wrote:

Thanks for the question.
It is an Analog CMOS comparator..
I have been using WinSpice(and Hspice) to observe its operation and it
works fine.
Now I want to write an academic paper about it. But before I do that I
thought
its better to ask experienced people how should I analyse it.
I have been looking for a reference on Comparator Analysis but I
haven't found any.

..Chris

Step 1 : Go to silicon.

Step 2 : ????
Step 3 : Profit!

Jim Thompson · May 20, 2005

On 20 May 2005 00:37:11 -0700, "Chris" <ntyangiri@gmail.com> wrote:

Thanks for the question.
It is an Analog CMOS comparator..

I have been using WinSpice(and Hspice) to observe its operation and it
works fine.

What does "works fine" mean? If the comparison voltage is accurate
and the speed is what you want, then you are done.

Now I want to write an academic paper about it.

"Academic paper"? Bwahahahahahaha!

You're way ahead of yourself. How can you write an "academic paper"
when you don't understand what you have?

But before I do that I
thought its better to ask experienced people how should I analyse it.
I have been looking for a reference on Comparator Analysis but I
haven't found any.

..Chris

480)460-2350 | |
| E-mail Address at Website Fax

Peter Bennett · May 20, 2005

On 20 May 2005 02:13:42 -0700, "JeffM" <jeffm_@email.com> wrote:

I'm looking for something to draw...wiring harnesses
Price is not as important as ease of use and no screwy behavior.
bill_hale @ agilent.com

One word - Visio
Charlie Edmondson

Another word: NO.[1]
http://groups-beta.google.com/group/sci.electronics.design/browse_frm/thread/7b9faecdf6591892/b21ea0ffb71e90ee?q=Visio-is-totally-unsuitable-for-wiring-diagrams+no-concept-of-wires+partial-understanding-of-connections+When-you-move-things-around+lots-of-rework
http://groups-beta.google.com/group/sci.electronics.design/browse_frm/thread/290760dca4bceba3/7b69c1d5b3a752bc?q=avoid-it-like-the-plague+clueless+wires+components
Click on the OP's twenty-two.htm link to see Visio-like screwy
drawings.

I don't think you can blame that mess entirely on Visio - the main
problem is the author's failure to follow normal electronic drafting
conventions.

If I really put my mind to it, I could probably do something just as
bad with Protel. (but it would be hard work!)

--
Peter Bennett VE7CEI
email: peterbb4 (at) interchange.ubc.ca
GPS and NMEA info and programs: http://vancouver-webpages.com/peter/index.html
Newsgroup new user info: http://vancouver-webpages.com/nnq

john jardine · May 20, 2005

<bill_hale@agilent.com> wrote in message
news:1116452152.526949.237730@o13g2000cwo.googlegroups.com...

I was using IVEX. It was OK.

I'm looking for something to draw schematics, not
necessarily PC related.

The ideal program would handle wiring harnesses and connectors
& switches really well--from a library. It would be easy to label
stuff.

I don't need PCB layout. I might want to draw an occasional electronic
schematic, tho. I don't even need connectivity lists.

Should run on a PC

I would need several hundred nodes.

Price is not as important as ease of use and no screwy
behavior.

What do the intelligentsia think? Bill Hale

http://tinycad.sourceforge.net/

Clean and straightforward. Bereft of the usual windows programmer
moronocities. (and it's free!).

Jim Thompson · May 21, 2005

On 18 May 2005 14:35:52 -0700, bill_hale@agilent.com wrote:

I was using IVEX. It was OK.

I'm looking for something to draw schematics, not
necessarily PC related.

The ideal program would handle wiring harnesses and connectors
& switches really well--from a library. It would be easy to label
stuff.

I don't need PCB layout. I might want to draw an occasional electronic
schematic, tho. I don't even need connectivity lists.

Should run on a PC

I would need several hundred nodes.

Price is not as important as ease of use and no screwy
behavior.

What do the intelligentsia think? Bill Hale

480)460-2350 | |
| E-mail Address at Website Fax

EN · May 22, 2005

"Jim Thompson" <thegreatone@example.com> wrote in message
news:839v815jbvfrcjjrv8matbml0rj0h3fup1@4ax.com...

On 18 May 2005 14:35:52 -0700, bill_hale@agilent.com wrote:

I was using IVEX. It was OK.

I'm looking for something to draw schematics, not
necessarily PC related.

The ideal program would handle wiring harnesses and connectors
& switches really well--from a library. It would be easy to label
stuff.

I don't need PCB layout. I might want to draw an occasional electronic
schematic, tho. I don't even need connectivity lists.

Should run on a PC

I would need several hundred nodes.

Price is not as important as ease of use and no screwy
behavior.

What do the intelligentsia think? Bill Hale

PSpice Student Version...

http://www.electronics-lab.com/downloads/schematic/013/

PSpice Schematics is excellent!
I love to cook with wine. Sometimes I even put it in the food.

Here's PSpice 9.2

http://www.sss-mag.com/spice.html

Mac · May 27, 2005

On Wed, 18 May 2005 16:44:32 -0700, Chris wrote:

There is no class,
Don't be rude.
Thats why I'm asking here about the standard methods for Analysis of a
Comparator.
If you give me a simple answer you could be of help.
Look I never had good access to classes as you might have had.
BTW I live in far East

Go read several datasheets for CMOS comparators. Write a datasheet for
your part based on your simulation results.

If any parameters in your part are far better than those in existing
comparators, those parameters might suggest a good title for your
thesis.

Example: "Designing a high-speed/low threshold comparator in CMOS," or
"Designing an ultra-wide common mode comparator in CMOS."

If you find that your comparator doesn't excel in any way, then call it a
"simple low-cost" comparator.

By the way, how is it that you have Hspice, but you don't have anyone to
talk to about this?

--Mac

Mick Sharpe · May 27, 2005

Try a UML editor such as ArgoUML - http://argouml.tigris.org/ - there are
plenty to choose from. Most of them will do state diagrams.

Jim Thompson · May 27, 2005

On 27 May 2005 13:58:10 -0700, "Mikal" <accclass101@hotmail.com>
wrote:

In any Quaduature modulator, you have a 'combiner' that combines the I
& Q. Anyone have an idea of how to implement this in pspice 9.2.3? I
dont see that part in my library... or am I missing it.

It's just an analog adder. Try ESUM if you're trying to do it
behaviorally.

I have several quadrature modulators lying around here (at the device
level

480)460-2350 | |
| E-mail Address at Website Fax

Jim Thompson · May 27, 2005

On 27 May 2005 16:13:28 -0700, "Mikal" <accclass101@hotmail.com>
wrote:

What's the best way to change the phase angle of an ac sign wave? For
example, I'm trying to sim costas loop, and I need a 90 degrees phase
shift from the VCO output.

How are you modeling the VCO?

If you are just using fixed sources, use

Vvco node1 node2 SIN (<ioff> <iampl> <freq> <td> <df> <phase&gt

480)460-2350 | |
| E-mail Address at Website Fax

Mick Sharpe · May 29, 2005

"JeffM" <jeffm_@email.com> wrote in message
news:1117232861.252414.271430@g43g2000cwa.googlegroups.com...

Posting your (otherwise apt) response individually to multiple groups

http://groups-beta.google.com/group/sci.electronics.design/browse_frm/thread/6e237cde14959cf6/79030c2395239382
seems like an odd way to do things.

Yes - very! I pressed the wrong button and sent a personal e-mail to the OP

and got into a bit of a frazzle when I realised my mistake. Never fear - I'l
get the hang of news groups eventually :-D

Jim Thompson · May 30, 2005

On 29 May 2005 17:23:28 -0700, beagle197@hotmail.com wrote:

Folks,
I encountered a show stopping warning after I created a schmatic in
Capture, and attempted to run the simulation using part that wasn't in
the standard capture library. I selected Place->Database Part->Internet
Component Assistant (ICA), with Part Number "Bav99 T/R", then clicked
"Place in Schematic". Using this part I created a circuit, then placed
a "Voltage/Level Marker" at an output point. After I clicked the "Run
PSpice" for the active profile, I received the following warning
message:

View DRC Marker
WARNING: [NET0093]
No PSpiceTemplate for DN1, ignorning

I have two other parts that I used in my schematic that also came from
placing database part, and they produce the same sort of warning
messages. Any suggestions how to resolve this issue?
Thanks
-Bea

Make a Template ?

480)460-2350 | |
| E-mail Address at Website Fax

Robert · May 30, 2005

<beagle197@hotmail.com> wrote in message
news:1117422598.105549.270080@g43g2000cwa.googlegroups.com...

yes i added a pspicetemplate property, but it looks like part of the
show stopper was that i didn't set "Implementation Type" to PSpice
Model. The warning didn't stop the show, as it was an error in another
area. this tool is very difficult to use...
-bea

Be warned. There are other libraries in the Tool (depending on how you
installed it) that reference parts that don't have simulation models and
therefore can't be simulated in PSpice. Some of them are specific to the PC
Board layout tool and perhaps there are others as well.

Robert

Kevin Aylward · May 30, 2005

beagle197@hotmail.com wrote:

I've been searching for a spice device model for SST201, VISHAY
SILICONIX, an N-Channel JFETs. Any such model or substitute exist?
thanks
bea

I think this is a j201. I think the sst is refering to the sot-23
package.

..MODEL J201 NJF(Beta=1.621m Betatce=-500m Rd=1 Rs=1 Lambda=2.236m
Vto=-600m Vtotc=-2.5m Is=114.5f
+ Isr=1.091p N=1 Nr=2 Xti=3 Alpha=506.8u Vk=251.7 Cgd=4.667p M=227.1m
+ Pb=500m Fc=500m Cgs=2.992p Kf=0.6042f Af=1)

I did a quick check on the data sheet and Vto appears to be consistant
with this.

Kevin Aylward
informationEXTRACT@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.

Kevin Aylward · May 30, 2005

beagle197@hotmail.com wrote:

How do I associate this model with the part? If I right click for
properties, "Edit Spice Model" option is grayed out/non-selectable.

This is only greyed out if you open the model browser from the symbol
properties dialog. You can use the blue "Md" button, or main menu
"Components\Model Library" to open the model editor directly, this will
ungrey tie button, or see below.

Is
there another way to add the model?

Yes.

Thanks

In SS you don't really have to do anything as the model is already there
under the alternate name j201.

If are adding a new model to SS, you can do one of two things:

1 put the model in a single file with an extension of .lib or .mod, and
then drag drop the file from Windows Explorer to the SS main window.
Your done. It will show up in the file browser. SS automatically
attaches symbols to those types of models.

or

2 In the model file browser (left main window), right click on a model
in a model file folder, and go "edit model file". This pops up the txt
file within the SS main frame. Paste in the model text and go save. Your
done.

Its best to put all your new models in your own file so that SS don't
overwrite them in a updated install.

Kevin Aylward
informationEXTRACT@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.

Charlie Edmondson · May 31, 2005

beagle197@hotmail.com wrote:

Folks,
I encountered a show stopping warning after I created a schmatic in
Capture, and attempted to run the simulation using part that wasn't in
the standard capture library. I selected Place->Database Part->Internet
Component Assistant (ICA), with Part Number "Bav99 T/R", then clicked
"Place in Schematic". Using this part I created a circuit, then placed
a "Voltage/Level Marker" at an output point. After I clicked the "Run
PSpice" for the active profile, I received the following warning
message:

View DRC Marker
WARNING: [NET0093]
No PSpiceTemplate for DN1, ignorning

I have two other parts that I used in my schematic that also came from
placing database part, and they produce the same sort of warning
messages. Any suggestions how to resolve this issue?
Thanks
-Bea

Bea,

You have run into one of the basic Murphy rules of simulation: At least
one (or usually more) of your parts will not have a simulation model
available. The database parts are assured to have a schematic symbol,
and a PCB layout footprint but ARE NOT going to have simulation models.
To get those, if it isn't in the standard PSpice libraries, you have
to actually do some design work. Read up in the manuals on how to
create a part for a model. There are lots of models available on the
web (this newsgroup often processes requests for them...) and once you
find the model, it is fairly straight forward to create a symbol for them.

Charlie

Jim Thompson · May 31, 2005

On 31 May 2005 12:05:48 -0700, "Mikal" <accclass101@hotmail.com>
wrote:

It appears as thought the low pass filters in PSpice have a rather
long phase delay. Is this characteristic exagerated in PSpice or is
that what I could typically see in the real world?
I'm trying to implement a Costas loop, and I just cant get my vco
to catch up with my RF. It appears as though the delays through the
filters are too long.

Anyone every do anything like a costas loop in PSice before?

What low pass filters are you speaking of?

Are you aware that PLL's need a lead-lag filter? A pure low pass will
be slo-o-o-ow to lock, or may not lock at all.

I just remembered this model....

* Ideal Voltage controlled oscillator models
* Modeled by BJanewicz
* 4/15/00
*
* Recommendation: Set ITL4=40 and specify a maximum time step to
avoid
* convergence errors.

* Explanation of terms

* Parameter Description
(default units)

* Fcenter = Center frequency for oscillator
(Hertz)
* Frange = Plus and minus range of frequency
(Hertz)
* Vmin = Minimum voltage which produces the frequency Fc-Fr
(Voltage)
* Vmax = Maximum voltage which produces the frequency Fc+Fr
(Voltage)
* Phase = Phase of output wave
(degrees)

*$
..subckt vco_sin in out Params: Fcenter=1k Frange=50 Vmin=0 Vmax=5
+phase=0

Rin in 0 1G
Rtable table 0 1G

Etable table 0 Value {Table(V(in),Vmin,-1,Vmax,1)}

Esin out 0
+Value
{sin(6.28318*(Fcenter*time+Frange*SDT(V(table)))+phase*(3.14159/180))}

..ends

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice

480)460-2350 | |
| E-mail Address at Website Fax

EAGLE Netlist conversion

Jim Thompson

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Peter Bennett

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Andrew Tweddle

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Rob Gaddi

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Jim Thompson

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Peter Bennett

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john jardine

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Jim Thompson

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EN

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Mac

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Mick Sharpe

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Jim Thompson

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Jim Thompson

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