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Stefano,

[...]Error: unknown token in: "[!](v(1))"[...]
I have no idea about this error, someone can
give me an help?

It's a spurious error message, and I've implemented
the fix in the source code for the next maintenance
release. In the meanwhile, you can either ignore
the message or or rewrite

b1 3 0 v=!(v(1))

as

b1 3 0 v=inv(v(1))

--Mike

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I used a B source to make an inverter gate.
sim
.subckt inv 1 2
b1 3 0 v=!(v(1))
r1 3 2 100
c1 2 0 10P
.ends inv
vin 10 0 pulse 0 10 1m 1n 1n 2m 4m
x1 10 20 inv ic=0
r1 20 0 1meg
.tran 100u 10m 0m 100u
.end

The behavior of the circuit seems to be ok but I got in the "spice
error log" the following message:

Circuit: sim

Error: unknown token in: "[!](v(1))"Date: Sun Oct 13 22:16:06 2002
Total elapsed time: 0.050 seconds.

tnom = 27
temp = 27
method = modified trap
totiter = 792
traniter = 789
equations = 6
tranpoints = 383
accept = 357
rejected = 26
trancuriters = 0


I have no idea about this error, someone can give me an help?
Stefano

I have posted a custom symbols guide in the Files. It is in the 'Tut'
folder.

Thanks to Mike Englehardt for his comments.

I've been using LTspice to model a few things and was surprised to
find out that there wasn't a users group. I've invited a few people to
join who have contributed a lot in sci.electronics.cad and
sci.electronics.design about SwitcherCAD III / LTspice.

Feel free to post schematics, symbols, models, subcircuits and so
forth in 'Files'; add to the Links; ask questions in the messages;
etc.

Ralph

analogspiceman wrote:

LTC's competitors must be feeling the heat. TI has apparently
just de-hobbled their circuit simulator offering by removing its
former artificial limitations on circuit size. I downloaded it
to have a look-see, but so far I am not impressed. It has a 100
Mb! footprint and the user interface seems much more cumbersome
(to be fair, I love the LTspice U/I and haven't yet put in enough
time to really learn the TINA-TI U/I).

Like LTspice, it comes with numerous examples and has "some" built
in SMPS support (don't know if it is a core function or just a
superficial add-on to please marketing). I think I read somewhere
that it allows component values to be changed "on the fly" in the
middle of a long transient simulation, but I haven't tried it.

TINA-TI is supposed to accept raw netlists as input, so it would
be interesting to benchmark it against LTspice, especially if they
can run an equivalent basic SMPS design.

I would love to see the comments of any LTspice users who are also
current or recently former TINA users. - a.s.
__________________________________________________________

<>

Now Available: TINA-TI Version 7.0!

TINA is an easy-to-use, but powerful, circuit simulation program
based on a SPICE engine. TINA-TI is a fully functional version
of TINA, loaded with a library of TI macromodels plus passive
and active models.

TINA-TI's new version 7.0 has changes from Version 6.0 in the
following areas:

* TINA-TI provides support for switching power supply devices.
* TINA-TI has no limit to circuit size.
* TINA-TI has more SPICE models and example circuits included.
* User will be notified when an update is available for the tool
. . and TI model library.
* TINA-TI now supports SMPS simulation capability.
* Circuits developed in TINA-TI 7.0 will work with TINA Industrial
. . version 7.

Based on a SPICE engine, TINA-TI provides all the conventional DC,
transient and frequency domain analysis of SPICE and much more.
TINA has extensive post-processing capability that allows you to
format results the way you want them. Virtual instruments allow
you to select input waveforms and probe circuit nodes voltages
and waveforms. TINA's schematic capture is truly intuitive - a
real "quickstart."

This complimentary version, TINA-TI, is fully functional but does
not support some other features available with the full version
of TINA.

TINA-TI installation requires approximately 100MB. Installation
is straight-forward and it can be uninstalled easily, if you wish.
We bet that you won't. [... continues - see web page. Oh, and I
bet I will.]

Hello:

So now they finally changed it! I was wrestling with serious interlocking limitations of it when they asked me to teach them in their product engineers last year's summer! During that time I could'nt help to show them my LTSpice example for ECG signal processing because TINA can't even read PWL files? Anyway let me take a look.

Berns B.