Good mixed signal Simulaor ??

[Matrix]

Hi all
i need a good mixed signal simulator which can meet my most analog
simulation requirements and some digital interfacing as well. Also it
would be of great help if i could get the models for the NEW OPAMPs of
Linear, Analog & TI etc or i could create such models as per my current
selections of opamps to get the better/realistic response of the
circuit. i am not satisfied with Multisim Electronics workbench 2001,
Circuitmaker 2000 and protel 99se simulations or performance which is
sometimes very unpredictable/inconsistent. thanks

PLEASE DO MENTION THE VERSION ALSO FOR THE RECOMMENDED PROGRAM.!!

 

[Joel Kolstad]

Hi all
i need a good mixed signal simulator which can meet my most analog
simulation requirements and some digital interfacing as well.

LTSpice, from Linear Tech's web site, is free and very good for the price.

For commercial offerings, I'd suggest SIMetrix by Catena is quite good (you
can also get the SIMetrix engine bundled in various schematic capture/PCB
tools such as Pulsonix).

Also it
would be of great help if i could get the models for the NEW OPAMPs of
Linear, Analog & TI etc

In general one just downloads these the manufacturers' web sites.

---Joel Kolstad

 

[Kevin Aylward]

LTSpice, from Linear Tech's web site, is free and very good for the
price.

LTSpice isnt really a mixed-mode simulator. e.g. As far as I am aware it
doesn't have clocked D/JK types.

For commercial offerings, I'd suggest SIMetrix by Catena is quite
good (you can also get the SIMetrix engine bundled in various
schematic capture/PCB tools such as Pulsonix).

Simetrix is a tad expensive.

Kevin Aylward B.Sc.
[email protected]
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

"There are none more ignorant and useless,than they that seek answers
on their knees, with their eyes closed"

 

[[email protected]]

LTSpice isnt really a mixed-mode simulator. e.g. As far as I am aware it
doesn't have clocked D/JK types.

It does have a D-type and an S/R. The last time I looked it didn't have
a T- or a J/K.

Building one is on my might do list.

 

[Matrix]

i have downloaded and tried LTSpice but there isn't option for
different type of sources to activate the circuit e.g. sine/triangular
wave to feed into an opamp circuit. if it has got then please inform me
or how could i do that alternatively. thanks

 

[[email protected]]

Hi all
i need a good mixed signal simulator which can meet my most analog
simulation requirements and some digital interfacing as well. Also it
would be of great help if i could get the models for the NEW OPAMPs of
Linear, Analog & TI etc or i could create such models as per my current
selections of opamps to get the better/realistic response of the
circuit. i am not satisfied with Multisim Electronics workbench 2001,
Circuitmaker 2000 and protel 99se simulations or performance which is
sometimes very unpredictable/inconsistent. thanks

PLEASE DO MENTION THE VERSION ALSO FOR THE RECOMMENDED PROGRAM.!!

Do you REALLY need a simulator, probably not. As you have allready
noticed they dont perform very well. Getting good results requires
years of experience and an expensive setup, very much a LAST resort,
you simulate when there is no practical alternative. Save your money
and buy some test gear, learn to build and measure. Not only is this
better but mostly its quicker as well.

 

[Damir]

i have downloaded and tried LTSpice but there isn't option for
different type of sources to activate the circuit e.g. sine/triangular
wave to feed into an opamp circuit. if it has got then please inform me
or how could i do that alternatively. thanks

Ask here: http://groups.yahoo.com/group/LTspice/

Regards,
Damir

 

[[email protected]]

Ask here: http://groups.yahoo.com/group/LTspice/

Regards,
Damir

Hi there.
Of course LTSpice can do sine/triangle / other waveforms. Would'nt be
much use if it could not.Click the "Component" icon(AND gate symbol) .
Select "voltage" source.
Place that. Right click on the symbol and choose "Advanced". You can
set up your
waveform from there.Triange you can make with PWL or use a pulse
waveform with total rise and fall times equil to the period and no
"Ton".
Hope this helps.
Cheers
Rob

 

[Jim Thompson]

Hi all
i need a good mixed signal simulator which can meet my most analog
simulation requirements and some digital interfacing as well. Also it
would be of great help if i could get the models for the NEW OPAMPs of
Linear, Analog & TI etc or i could create such models as per my current
selections of opamps to get the better/realistic response of the
circuit. i am not satisfied with Multisim Electronics workbench 2001,
Circuitmaker 2000 and protel 99se simulations or performance which is
sometimes very unpredictable/inconsistent. thanks

PLEASE DO MENTION THE VERSION ALSO FOR THE RECOMMENDED PROGRAM.!!

PSpice A/D.

...Jim Thompson

 

[Genome]

i have downloaded and tried LTSpice but there isn't option for
different type of sources to activate the circuit e.g. sine/triangular
wave to feed into an opamp circuit. if it has got then please inform me
or how could i do that alternatively. thanks

For fucks sake.... it's like having a wank.

Either it comes naturally or you have to work at it.

DNA

 

[Jim Thompson]

For fucks sake.... it's like having a wank.

Either it comes naturally or you have to work at it.

DNA

Bwahahahahahaha! ROTFLMAO ;-)

...Jim Thompson

 

[Kevin Aylward]

Do you REALLY need a simulator, probably not. As you have allready
noticed they dont perform very well.

Only if you don't know how to drive it properly. Spice itself performs
brilliantly.

Getting good results requires
years of experience and an expensive setup,

Spice is cheap, so no on that front. Yes, typically, to be useful as an
analogue designer, you need at least 5 years of post graduate
experience, irrespective of whether you use spice or not.

very much a LAST resort,
you simulate when there is no practical alternative.

Oh dear...here we go again...complete nonsense. Try designing a 10,000
transistor circuit on the bench. Its just not going to happen mate.

Again, for the Nth time, spice simulators are *mandatory" for any
analogue ic design. For pros that really know how to use spice, spice
for board level design is still bread and butter.

Save your money
and buy some test gear, learn to build and measure.

Yes, real gear is very, very useful, but so is knowing spice. For i.c.
design, all products are designed entirely using simulation with, many,
many working completely correctly on 1st pass silicon. This is the way
it is. No amount of "hey, spice is not the real world" will change the
facts of what is actually done in ic companies on a day to day basis,
successfully.

Sure, it can be a bit more work in board level to get the models ok, but
someone who actually knows what he is doing, does this with little
trouble. Its only the novices and inexperienced that cant get spice to
give accurate, realistic results for all but the most stubborn board
level circuits.

Not only is this
better

No it isnt.

but mostly its quicker as well.

No it isnt.

Kevin Aylward B.Sc.
[email protected]
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

"There are none more ignorant and useless,than they that seek answers
on their knees, with their eyes closed"

 

[[email protected]]

Oh dear...here we go again...complete nonsense. Try designing a 10,000
transistor circuit on the bench. Its just not going to happen mate.

At last you agree with me.

Again, for the Nth time, spice simulators are *mandatory" for any
analogue ic design. For pros that really know how to use spice, spice
for board level design is still bread and butter.

And for the Nth time the op isn't intersed in ic design.

Yes, real gear is very, very useful, but so is knowing spice. For i.c.
design, all products are designed entirely using simulation with, many,
many working completely correctly on 1st pass silicon.

Once more your still banging on about the irrelevant.

Sure, it can be a bit more work in board level to get the models ok, but
someone who actually knows what he is doing, does this with little
trouble. Its only the novices and inexperienced that cant get spice to
give accurate, realistic results for all but the most stubborn board
level circuits.
Which is exactly the position of the op. For HIM he's just wasting money.


No it isnt. Why not?


No it isnt.

It sure is.

 

[Kevin Aylward]

And for the Nth time the op isn't intersed in ic design.

He is interested in analogue design. Analogue IC design point the
correct way to board level design.

Once more your still banging on about the irrelevant.

Nope. Illustrating that for the *majority* of analogue applications,
Spice is absolutely indispensable.

Oh? Your a mindreader than?

However, based on logic, to wit:

"would be of great help if i could get the models for the NEW OPAMPs of
Linear, Analog & TI etc or i could create such models as per my current"

Its seems he is doing generic circuit circuit design.

For HIM he's just wasting

Complete nonsense. You have not got a bloody clue what your talking
about.

Been there mate. Analogue, board design for many years in addition to
many years ic design. Spice is the way to go for both. Not debatable.
Once you become a real analogue engineer you will understand why.

Why not?

Ho humm...the differance is in line with why we PCs use software to
program them. A hardware version of Excel would be a tad tricky.

It sure is.

Crap. It takes a few seconds to set up a simulation, bloody hours
soldering up a circuit.


Kevin Aylward B.Sc.
[email protected]
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

"There are none more ignorant and useless,than they that seek answers
on their knees, with their eyes closed"

 

[[email protected]]

He is interested in analogue design. Analogue IC design point the
correct way to board level design.

What rubbish, Spice was only invented because you cant breadboard an
ic.

Nope. Illustrating that for the *majority* of analogue applications,
Spice is absolutely indispensable.

I wonder how we managed before spice?

Oh? Your a mindreader than?

How can he be an expert if he's asking this question?

Complete nonsense. You have not got a bloody clue what your talking
about.

From his question it would seem that he has allready found that it's a

waste of cash. Hopefully he will realise buying yet another simulator
would waste even more.

Ho humm...the differance is in line with why we PCs use software to
program them. A hardware version of Excel would be a tad tricky.

So you cant actually answer the question then.

Crap. It takes a few seconds to set up a simulation, bloody hours
soldering up a circuit.

Some years ago I made the mistake of buting EC2 simulator (Tatum labs).
I couldnt get a 4 transistor amp to simulate so I phoned up the
supplier (Those Engineers) he said "no problem come down tomorrow and
i'll show you how to do it". Eight hours later he still couldnt even
get a DC analasis, bear in mind it's just 4 bjts and a few resistors,
just like you as I was leaving he was still telling me how easy it was.
I know your going to tell me things are much better now but as you have
a simulator to sell you would wouldnt you. Yes it did take hours to
build but as I had to build it anyway it hardly matters. I guess if all
you make is "virtual products" the simulation is ok after all it doesnt
much matter if its not quite right.

 

[Sjouke Burry]

Wow, so I wonder how I have been designing
stuff for 40 years.Must have been in my
imagination.....
(I have never used any simulator for electronics).

 

[Jim Thompson]

Wow, so I wonder how I have been designing
stuff for 40 years.Must have been in my
imagination.....
(I have never used any simulator for electronics).

I've been designing for ~50 years...

But you've not designed something with a few thousand transistors in a
single circuit.

...Jim Thompson

 

[Sjouke Burry]

I've been designing for ~50 years...

But you've not designed something with a few thousand transistors in a
single circuit.

...Jim Thompson

Well.. One of my designs needed a 5v 50 amp
supply,did not count the components, but I
used a 19 inch rack 1.8 meter high to store
it all.

 

[Jim Thompson]

Well.. One of my designs needed a 5v 50 amp
supply,did not count the components, but I
used a 19 inch rack 1.8 meter high to store
it all.

Piker! I did a 5V/400A supply for an acoustic imaging machine about
30 years ago ;-)

...Jim Thompson

 

[Phat Bytestard]

Only if you don't know how to drive it properly. Spice itself performs
brilliantly.

I agree 100%.

We used to sim everything we built. Works great as long as one
knows where and when certain parasitic effects need to be included,
etc. (or not). If you don't include ALL the parameters of your
circuit in a sim set up, it is obviously not going to behave in the
manner your real world set up behaves.

Whenever there is such a disparity between one's circuit and one's
sim, one has left out a parameter of the circuit's operation in the
sim setup that affects it adversely enough to yield a significant
difference in the results observed over the results calculated and
displayed. When they match up, one actually reinforces one's
knowledge of electronics due to the fact that one was able to locate
and include all the elements of the physical circuit that affect its
function or operation. A good sim package, and a good sim engineer
makes a good sim package one hell of a goo learning tool.

Complaining that sims never work merely means that what is really
going on is the engineer or technician in question is not working at
full capacity. Put ALL of the parameters in, and get reliable
results... it really is that SIMple.

Even works in realms where parasitics are rampant, such as High
Voltage Power Supplies or Micro-Wave RF gear.

Since it works so well when it is set up correctly, this can only
mean that a non functioning sim points to operator error, and or a non
functioning SIMgineer. :-]