EAGLE Netlist conversion

[Helmut Sennewald]

"Ulrich Strate" <df4kv@web.de> schrieb im Newsbeitrag
news:bgjn6f$p6cq8$1@ID-125754.news.uni-berlin.de...

Hello,

Helmut Sennewald wrote:

When I use the correct command PULSE(0 1 0 9.98u 20n 0n 10u),
I still have got the error message and the wrong period.
The only way to overcome this problem is something like
PULSE(0 1 0 9.98u 19.999n 0n 10u) .

I tried n's instead of u's and it worked:

PULSE(0 1 0 9.98u 20n 0n 10000n)

Hello Ulrich,
thanks for the tipp.

I am shure your workaround peforms by luck and nobody can guarantee it
will work with most other numbers. The whole case is simply a floating
point number problem which needs special treatment.

I hope Mike implements something similar to the proposal in my previous
posting.

Best Regards
Helmut

 

[Ulrich Strate]

Helmut Sennewald wrote:

"Ulrich Strate" <df4kv@web.de> schrieb im Newsbeitrag
news:bgjn6f$p6cq8$1@ID-125754.news.uni-berlin.de...

Hello,

Helmut Sennewald wrote:


When I use the correct command PULSE(0 1 0 9.98u 20n 0n 10u),
I still have got the error message and the wrong period.
The only way to overcome this problem is something like
PULSE(0 1 0 9.98u 19.999n 0n 10u) .

I tried n's instead of u's and it worked:

PULSE(0 1 0 9.98u 20n 0n 10000n)


Hello Ulrich,
thanks for the tipp.

I am shure your workaround peforms by luck and nobody can guarantee it
will work with most other numbers. The whole case is simply a floating
point number problem which needs special treatment.

Yes, of course I agree. Your suggested cure looks reasonable, rather
adjusting waveforms than clock frequencies which often need to be
xtal-controlled in real life..
I encountered that problem (not considering it as a "bug" then) a few times
before, so I got used to check the error log for timing overlaps followed
by "tuning".

regards
Ulrich

p.s.: THX for your numerous very helpful hints concerning import of models
etc.!

 

[Jim Thompson]

On 04 Aug 2003 17:45:18 GMT, "Mike Engelhardt" <pmte@concentric.net>
wrote:

This really just deals with the fact the LTspice has been extended
to allow the pulse function to work as a triangular wave. However,
it could have trouble with both on time and off times being zero,
so it made an adjustment if it didn't numerically work out so that
it could reliably give you the triangular wave and issue the warning
in the .log file.

To get some perspective, run the following deck in PSpice and see
how a standard simulator completely corrupts the wave form:

* triangular wave
V1 N001 0 pulse(0 1 0 .5m .5m 0 1m)
[snip]

V1 N001 0 pulse(0 1 0 .5m .5m 1p 1m) ; Works Just Ducky ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| Jim-T@analog_innovations.com Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

For proper E-mail replies SWAP "-" and "_"

Why is it that Democrats can't debate politely?
And are only rude and interruptive.
Lack of mental capacity?

 

[Mike Engelhardt]

Chris,

LTspice uses it's own string to double routines so different ways
of writing the same number can lead to a different value in the
equivalent of the 16th digit when converted to binary floating
point.

They all simulate identically under the current version, 2.04t.

--Mike

"Chris Carlen" <crobc@BOGUSFIELD.earthlink.net> wrote in message
news:bgn3o30tma@enews4.newsguy.com...

Mike Engelhardt wrote:
This really just deals with the fact the LTspice has been extended
to allow the pulse function to work as a triangular wave. However,
it could have trouble with both on time and off times being zero,
so it made an adjustment if it didn't numerically work out so that
it could reliably give you the triangular wave and issue the warning
in the .log file.

To get some perspective, run the following deck in PSpice and see
how a standard simulator completely corrupts the wave form:

* triangular wave
V1 N001 0 pulse(0 1 0 .5m .5m 0 1m)
R1 N001 0 1K
.tran 3m 3m
.probe
.end

Anyway, the core trouble with Ton=Toff=0 has been resolved in
version 2.04p so that it no longer has to extend the period
numerically significantly to reliably execute a triangular wave.
However, if the period is specified and is less then
Trise+Tfall+Ton, then it is still extended to Trise+Tfall+Ton
and the same warning is issued.

Chris's deck will now run as he expected.

--Mike


Hi Mike, thanks for the update which I'll download in a minute.

But how do you explain this (in ver. 2.04o):

* Y:\spice\LT-SWcad\solenoid.drive\pulse-bug.asc
V1 N001 0 PULSE(0 1 0 9u 1u 0 10u)
V2 N002 0 PULSE(0 1 0 9E-6 1E-6 0 10E-6)
V3 N003 0 PULSE(0 1 0 0.000009 0.000001 0 0.00001)
.tran 0 1000u 0 50n
.backanno
.end

The warnings are issued for V1 and V2, but *not* V3 which simulates as I
expected.

???


Good day!



--
_____________________
Christopher R. Carlen
crobc@earthlink.net
Suse 8.1 Linux 2.4.19

 

[Brad Velander]

Gone bye, bye!
Try the Altium website to find tutorials and or PDF documents outlining
the new methodogies.

--
Sincerely,
Brad Velander

"EmSinc" <EmSinc@hotmail.com> wrote in message
news:ScdYa.53205$PD3.4550821@nnrp1.uunet.ca...

Hi,

I've just started my first PCB with DXP version and I'm looking for Global
button in the components properties (from 99SE ). Was it removed or
changed
the location only?
Thanks in advance for any help.

Adam

 

[EmSinc]

I found it. The name of the function/button is gone but you can apply the
global changes with Find Similar Objects function from right-click menu in
SCH or PCB.

Adam




"Brad Velander" <spam_this@nowhere.com> wrote in message
news:cFmYa.45289$LD6.993074@news0.telusplanet.net...

Gone bye, bye!
Try the Altium website to find tutorials and or PDF documents
outlining
the new methodogies.

--
Sincerely,
Brad Velander

"EmSinc" <EmSinc@hotmail.com> wrote in message
news:ScdYa.53205$PD3.4550821@nnrp1.uunet.ca...
Hi,

I've just started my first PCB with DXP version and I'm looking for
Global
button in the components properties (from 99SE ). Was it removed or
changed
the location only?
Thanks in advance for any help.

Adam

 

[Spehro Pefhany]

On 7 Aug 2003 09:29:49 -0700, the renowned priyal1977@yahoo.com
(Priyal) wrote:

Hi all,
I have a PCB that is already fabricated and ready to use. There are
several ICs on this board. I just discovered that the pin-assignment
of one of the ICs differs a lot from the pin-out of its datasheet.
I do NOT want to re-spin the board as it will cost me too much.
I am planning to layout another board (a small one) on which i will
put this IC.

My question is, is there any way i can connect these 2 boards to
communicate with each other? Will these be a feasible solution?

Maybe. What kind of package is involved.. is it a 500+ pin BGA or a
TSSOP-48 or a DIP-40? If it's a DIP package and you can buy a smaller
SMT part you might be able to make a tiny board that fits overtop the
original footprint.

If it's just a couple of pins, you might be able to fix it by lifting
legs and using magnet wire and perhaps a drip or two of epoxy to tack
the wires.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[EmSinc]

I found it. The name of the function/button is gone but you can apply the
global changes with Find Similar Objects function from right-click menu in
SCH or PCB.

Adam


"Brad Velander" <spam_this@nowhere.com> wrote in message
news:cFmYa.45289$LD6.993074@news0.telusplanet.net...

Gone bye, bye!
Try the Altium website to find tutorials and or PDF documents
outlining
the new methodogies.

--
Sincerely,
Brad Velander

"EmSinc" <EmSinc@hotmail.com> wrote in message
news:ScdYa.53205$PD3.4550821@nnrp1.uunet.ca...
Hi,

I've just started my first PCB with DXP version and I'm looking for
Global
button in the components properties (from 99SE ). Was it removed or
changed
the location only?
Thanks in advance for any help.

Adam

 

[Jim Thompson]

On Thu, 7 Aug 2003 00:23:19 -0300, Chaos Master
<renanNOSPAM@punks.net> wrote:

Anybody here has a SPICE model for a Schmitt trigger?

What variety of Spice?

Specific trip levels or generic?

Speed of operation?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| Jim-T@analog_innovations.com Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

For proper E-mail replies SWAP "-" and "_"

Why is it that Democrats can't debate politely?
And are only rude and interruptive.
Lack of mental capacity?

 

[Chaos Master]

Thy person named Jim Thompson wrote:

On Thu, 7 Aug 2003 00:23:19 -0300, Chaos Master
renanNOSPAM@punks.net> wrote:

Anybody here has a SPICE model for a Schmitt trigger?

What variety of Spice?
PSpice 9.1 Student, preferably.

But if needed, I have SuperSpice.

Specific trip levels or generic?
Generic.
Speed of operation?
I don't know about this.

--
To contact via e-mail please replace(email address,nospam,rc).
Spam is redirected to \dev\null or Trash Bin, depending on your OS.

 

[Kevin Aylward]

Chaos Master wrote:

Anybody here has a SPICE model for a Schmitt trigger?

SuperSpice has a working cmos Schmitt trigger schematic example. There
are also full cmos Schmitt trigger models in the AnalogeDigital library.

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.

 

[Jim Thompson]

On Fri, 8 Aug 2003 00:38:39 -0300, Chaos Master
<renanNOSPAM@punks.net> wrote:

Thy person named Jim Thompson wrote:
On Thu, 7 Aug 2003 00:23:19 -0300, Chaos Master
renanNOSPAM@punks.net> wrote:

Anybody here has a SPICE model for a Schmitt trigger?

What variety of Spice?
PSpice 9.1 Student, preferably.
But if needed, I have SuperSpice.
Specific trip levels or generic?
Generic.
Speed of operation?
I don't know about this.

For a totally programmable Schmitt trigger, see "EasySchmitt.pdf" on
the S.E.D/Schematic page of my website.

I don't know if the Student version will do the NANDs. If not,
replace with your typical S-R-Flop made from NPNs.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| Jim-T@analog_innovations.com Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

For proper E-mail replies SWAP "-" and "_"

Why is it that Democrats can't debate politely?
And are only rude and interruptive.
Lack of mental capacity?

 

[Kevin Aylward]

Jim Thompson wrote:

On Fri, 8 Aug 2003 00:38:39 -0300, Chaos Master
renanNOSPAM@punks.net> wrote:

Thy person named Jim Thompson wrote:
On Thu, 7 Aug 2003 00:23:19 -0300, Chaos Master
renanNOSPAM@punks.net> wrote:

Anybody here has a SPICE model for a Schmitt trigger?

What variety of Spice?
PSpice 9.1 Student, preferably.
But if needed, I have SuperSpice.
Specific trip levels or generic?
Generic.
Speed of operation?
I don't know about this.

For a totally programmable Schmitt trigger, see "EasySchmitt.pdf" on
the S.E.D/Schematic page of my website.

I don't know if the Student version will do the NANDs. If not,
replace with your typical S-R-Flop made from NPNs.

Of course, XSpice has a configurable standard inbuilt part, i.e. one
with essentially, zero evaluation time, when compared to say, a diode.

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.

 

[Chaos Master]

Thy person named Kevin Aylward wrote:

Chaos Master wrote:
Anybody here has a SPICE model for a Schmitt trigger?

SuperSpice has a working cmos Schmitt trigger schematic example. There
are also full cmos Schmitt trigger models in the AnalogeDigital library.

Thanks.
I'll take a look.
--
To contact via e-mail please replace(email address,nospam,rc).
Spam is redirected to \dev\null or Trash Bin, depending on your OS.

 

[Active8]

In article <bgoivi$dhm$1@sparta.btinternet.com>,
beginner@btopenworld.com says...

Thanks for all the replies. I think I have sussed it out now:

In eagle nets are used to make the connections in the
schematic editor. Signals are only available in layout
editor. The signals are the airwires, and we use the signal
command if we don't have airwires, i.e. when we did not
have a schematic.

I don't know if we have the same terms and commands in
orcad or other cad programs, but it would be interesting
to know if it is.

generally speaking, "signal" is a broad term and is used loosely.
"signal names" are quite often assigned to device pins as "pin names".
you can use your "signal name" as a net alias.

"net" refers to a logical connection of wires, components, sources, etc.
it's synonymous with "circuit node" in this context. you can alias nets
in a good capture tool. nets with the same alias are connected, usually
only on the same page, though, and the documented rules for a cad
package can be ambiguous if not contradictory.

a cap/sim combo tool will most likely have some predefined global nets
for analog and digital device power. another set of connection rules.

you can assign alias to nets which could refer to a device pin like
alias "Q0". this scales well when dealing with busses, hierarchical
designs, off page connections, etc.

Eagle's terms sound kinda goofy to me because i think of "routing" PCBs
or laying out "routes" with "tracks" or "traces". "signal" and
"airwire" have no meaning to me and i'll just file that info for
unlikely to be needed soon.

nets are common connections passed in from the capture program,
otherwise there are no nets, you just draw "traces" to make "routes".

"line" still refers to a graphic object. a necessary feature, IMHO.
geometric objects can be used as functional block outlines, silkscreen
objects, route and part keepouts, pour regions, etc., but they aren't
treated as electrical objects, though IIRC you can associate them with a
net like the ground net for your pours.

aside from the obvious other uses, "airwires" and airlines" are
unofficial terms (probably only ever used by M.M. of F.T.I., and someone
involved with Eagle, i suppose) for what you have if you can pull aerial
cable under enough tension that it stays in the air without any mid-span
rollers to support it, in case you wanted to know.

hope this helps for when you get into big capture projects.

 

[Brad Velander]

You got it. I don't use DXP, therefore I couldn't have even told you where
exactly to find it.

--
Sincerely,
Brad Velander

"EmSinc" <EmSinc@hotmail.com> wrote in message
news:5kyYa.53636$PD3.4555399@nnrp1.uunet.ca...

I found it. The name of the function/button is gone but you can apply the
global changes with Find Similar Objects function from right-click menu in
SCH or PCB.

Adam

 

[Jian]

Active8 <mcolasono@earthlink.net.invalid> wrote in message news:<MPG.199e7f27e79f114998977b@news.east.earthlink.net>...

In article <25029d62.0308080833.5badae7c@posting.google.com>,
jxwang@sympatico.ca says...


Hi:

To calculate mutual inductance of two wires, people refer to
the formula in the papaer provided by G. A. Campbell
(Physics Review Vol 5 pp452, 1915, available at
http://prola.aps.org/pdf/PR/v5/i6/p452_1
or send an e-mail to me and I'll send you a copy)

that link requires a subscription. the info page link is broken. but i'm
interested. i'd like to see it.

Send me your e-mail address.

It's a nice piece of work. The book of F. W. Grover
(Inductance Calculation (1962)) used his formula as well.

wouldn't mind seeing his mutual L info, either.

I have to make the few pages into electronic form first.

mike

But I have a question on the case if the common perpendicular
Pp is within one or two wires. They both said the formula
is for 'any' case, but it seems to me it applys only to case
like "/\" (not in same plane). I don't see how to apply it to these cases:

case 1: two wires, one lays over the other, making a 'X', any angle,
not 90 degree, not necessary centered. You raise the top one to a
distance.

case 2: two wires making a 'T' but with any angle, not 90 degree,
not necessary touched. You raise one of the two to a distance.

If you know how to use his formula into above two cases, please
advise me. Thank you in advance.

Jian

 

[Mathew Orman]

"Mike Engelhardt" <pmte@concentric.net> wrote in message
news:bhh4li$mhs@dispatch.concentric.net...

Paul,

I've been having problems trying to get LTS to generate square waves.
I assume one uses an independent voltage source and then selects the
'pulse' option. There are various parameters to enter in the boxes
with one notable exception: 'off-time' by which I mean the interval
during which a periodic square waveform output is zero. I can only set
it up for instantaneous, regular 'offs', so the overall effect is one
of seeing something similar to a steady DC signal with vertical slices
in it. It doesn't seem possible to expand the slices to get a 50
percent duty cycle - or any duty cycle at all other than virtually 99%
in fact. Is this a bug or have I done something wrong?

The PULSE function is indeed what you want. Enter this as the value:

PULSE(0 1 0 1u 1u .5m 1m)

This is equivalent to using the PULSE editor and entering

Vinital: 0
Von: 1
Tdelay: 0
Trise: 1u
Tfall: 1u
Ton: .5m
Tperiod: 1m

That will give you a 1KHz square wave. You can enter a Ncycles
if you want it to stop after so many periods. Hope this helps.

--Mike

Also to get a realistic square pulse one needs to add a low-pass filter.
Or else the transition end point corners will have harmonics all the way to
THz limit.

Sincerely,

Mathew Orman
www.ultra-faster-than-light.com
www.radio-faster-than-light.com

 

[R.Legg]

Paul Burridge <redscar@waitrose.notformail.com> wrote in message news:<6p0ojvgkcrnttbkup7timhdgd840ajilmk@4ax.com>...

Hi all,

I've been having problems trying to get LTS to generate square waves.
I assume one uses an independent voltage source and then selects the
'pulse' option. There are various parameters to enter in the boxes
with one notable exception: 'off-time' by which I mean the interval
during which a periodic square waveform output is zero. I can only set
it up for instantaneous, regular 'offs', so the overall effect is one
of seeing something similar to a steady DC signal with vertical slices
in it. It doesn't seem possible to expand the slices to get a 50
percent duty cycle - or any duty cycle at all other than virtually 99%
in fact. Is this a bug or have I done something wrong?

The parameters that you can set for a voltage source in pulse mode in
SwCad III are:

Vinitial
Von
Tdelay
Trise
Tfall
Ton
Tperiod
Ncycles

Duty cycle is controlled by the ratio of Ton/Tperiod.

RL

 

[Kevin Aylward]

Active8 wrote:

hi:

maybe the ABM2 part isn't appropriate for this. i want to model a
phase detector's gain, Kp. can't use VP(%IN1), etc. in the expression
since it's a probe function and of course TIME won't work since it'll
be the same for that time slice.

what do i need to do to get Kp in V/rad, rad being the phase diff of
the 2 inputs?

Im not really clear on what your trying to do. However, if you are
making a small signal model of pll, then there is nothing to model for
the phase detector. Its Kp, i.e. an amplifier. The model is already a
volts/phase model. The phase detector is a subtracter.

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.