>Here's an interesting one:
>https://www.seventransistorlabs.com/Images/LTSpice_TC4421.png
>
>Small tweaks to initial timestep make big differences! Extreme sensitivity.
>
>Oldish version of LTspice4 (Mar 5 2015) because I don't care about updating.
>
>For other conditions, some traces continue plotting, while some stop in
>their tracks. What the hell is that about?
>
>Regarding input clamp: the original model actually does that?
>Holy /fuck/!
Yes. If that gives heartburn, set PARAM CLAMP=0.
>
>Tim
I had no problem at all running on LTspice IV, but I always use
"Alternate Solver".
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Thinking outside the box... producing elegant solutions,
by understanding what nature is hiding.
"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
Reply by Tim Williams●April 25, 20182018-04-25
Here's an interesting one:
https://www.seventransistorlabs.com/Images/LTSpice_TC4421.png
Small tweaks to initial timestep make big differences! Extreme sensitivity.
Oldish version of LTspice4 (Mar 5 2015) because I don't care about updating.
For other conditions, some traces continue plotting, while some stop in
their tracks. What the hell is that about?
Regarding input clamp: the original model actually does that?
Holy /fuck/!
Tim
--
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Contract Design
Website: https://www.seventransistorlabs.com/
"Tim Williams" <tiwill@seventransistorlabs.com> wrote in message
news:pbqcvk$ru$1@dont-email.me...
> Timestep too small, before even completing a rising edge. Occurs even at
> embarassingly loose settings (ABSTOL, CHGTOL = 1u). XSPICE.
>
> Tim
>
> --
> Seven Transistor Labs, LLC
> Electrical Engineering Consultation and Contract Design
> Website: https://www.seventransistorlabs.com/
>
> "Jim Thompson" <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote
> in message news:p0gsddlnc3m9qspdqjgpjoft1lemebhab3@4ax.com...
>> Announcement: Spice Models for TC4421/TC4422 posted on my website...
>>
>> See TC4421-TC4422.zip on the Device Models & Subcircuits Page of my
>> website.
>>
>> This behavioral modeling post is for announcement purposes only.
>>
>> To submit questions or comments, or to request assistance, please
>> use the envelope icon (at top of my home page).
>>
>> To avoid spam filtering, follow the instructions carefully.
>>
>> ...Jim Thompson
>> --
>> | James E.Thompson | mens |
>> | Analog Innovations | et |
>> | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
>> | STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
>> | Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
>> | E-mail Icon at http://www.analog-innovations.com | 1962 |
>>
>> Thinking outside the box... producing elegant solutions,
>> by understanding what nature is hiding.
>
Reply by Tim Williams●April 25, 20182018-04-25
Timestep too small, before even completing a rising edge. Occurs even at
embarassingly loose settings (ABSTOL, CHGTOL = 1u). XSPICE.
Tim
--
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Contract Design
Website: https://www.seventransistorlabs.com/
"Jim Thompson" <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote in
message news:p0gsddlnc3m9qspdqjgpjoft1lemebhab3@4ax.com...
> Announcement: Spice Models for TC4421/TC4422 posted on my website...
>
> See TC4421-TC4422.zip on the Device Models & Subcircuits Page of my
> website.
>
> This behavioral modeling post is for announcement purposes only.
>
> To submit questions or comments, or to request assistance, please
> use the envelope icon (at top of my home page).
>
> To avoid spam filtering, follow the instructions carefully.
>
> ...Jim Thompson
> --
> | James E.Thompson | mens |
> | Analog Innovations | et |
> | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
> | STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
> | Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
> | E-mail Icon at http://www.analog-innovations.com | 1962 |
>
> Thinking outside the box... producing elegant solutions,
> by understanding what nature is hiding.
Reply by Jim Thompson●April 25, 20182018-04-25
On Tue, 24 Apr 2018 10:37:48 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:
>On Mon, 23 Apr 2018 23:13:51 -0700 (PDT), djlocher56@gmail.com wrote:
>
>>On Monday, April 23, 2018 at 4:25:17 PM UTC-4, Jim Thompson wrote:
>>> Announcement: Spice Models for TC4421/TC4422 posted on my website...
>>>
>>> See TC4421-TC4422.zip on the Device Models & Subcircuits Page of my
>>> website.
>>>
>>> This behavioral modeling post is for announcement purposes only.
>>>
>>> To submit questions or comments, or to request assistance, please
>>> use the envelope icon (at top of my home page).
>>>
>>> To avoid spam filtering, follow the instructions carefully.
>>>
>>> ...Jim Thompson
>>
>>How do they differ from what the manufacturer supplies here:?
>>
>>http://www.microchip.com/wwwproducts/en/en010665#datasheet-toggle
>
>My version converges and runs on LTspice. The Microchip version hangs
>on LTspice.
>
> ...Jim Thompson
Elaborating:
I got into the Spice modeling business several years ago when I had a
need for a model of a chip that a client wanted me to design an
interface to. No model existed, so I rolled my own. That turned into
a hobby... amusing myself by how compactly I could model the essence
of an OpAmp... often as little as one to two lines in a subcircuit.
The hobby has now become a business, nearly 80% of my workload...
great, because the chip business has migrated to needing only very low
power analog interfaces into digital processing :-( Which interfaces
I design for a number of small medically-oriented chip houses.
As for what I announced here... I don't pick part numbers out of the
air... how could I know what people need? Like most of the models on
my Device Models & Subcircuits Page this was from a post on the
LTspice List... nobody could get the Microchip model to run on
LTspice... so I took that as a challenge... and succeeded ;-)
Most of what I'm doing now isn't so simple... humongous complicated
functions where companies need to present a model that doesn't divulge
their IP, yet simulates smoothly on ALL platforms.
Inquiries welcome ;-)
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Thinking outside the box... producing elegant solutions,
by understanding what nature is hiding.
"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
Reply by Jim Thompson●April 24, 20182018-04-24
On Mon, 23 Apr 2018 23:13:51 -0700 (PDT), djlocher56@gmail.com wrote:
>On Monday, April 23, 2018 at 4:25:17 PM UTC-4, Jim Thompson wrote:
>> Announcement: Spice Models for TC4421/TC4422 posted on my website...
>>
>> See TC4421-TC4422.zip on the Device Models & Subcircuits Page of my
>> website.
>>
>> This behavioral modeling post is for announcement purposes only.
>>
>> To submit questions or comments, or to request assistance, please
>> use the envelope icon (at top of my home page).
>>
>> To avoid spam filtering, follow the instructions carefully.
>>
>> ...Jim Thompson
>
>How do they differ from what the manufacturer supplies here:?
>
>http://www.microchip.com/wwwproducts/en/en010665#datasheet-toggle
My version converges and runs on LTspice. The Microchip version hangs
on LTspice.
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Thinking outside the box... producing elegant solutions,
by understanding what nature is hiding.
"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
Reply by ●April 24, 20182018-04-24
On Tuesday, April 24, 2018 at 2:13:56 AM UTC-4, djloc...@gmail.com wrote:
> On Monday, April 23, 2018 at 4:25:17 PM UTC-4, Jim Thompson wrote:
> > Announcement: Spice Models for TC4421/TC4422 posted on my website...
> >
> > See TC4421-TC4422.zip on the Device Models & Subcircuits Page of my
> > website.
> >
> > This behavioral modeling post is for announcement purposes only.
> >
> > To submit questions or comments, or to request assistance, please
> > use the envelope icon (at top of my home page).
> >
> > To avoid spam filtering, follow the instructions carefully.
> >
> > ...Jim Thompson
> > --
> > | James E.Thompson | mens |
> > | Analog Innovations | et |
> > | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
> > | STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
> > | Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
> > | E-mail Icon at http://www.analog-innovations.com | 1962 |
> >
> > Thinking outside the box... producing elegant solutions,
> > by understanding what nature is hiding.
>
> How do they differ from what the manufacturer supplies here:?
>
> http://www.microchip.com/wwwproducts/en/en010665#datasheet-toggle
you have to click "view datasheet" and then the spice model is available
Reply by ●April 24, 20182018-04-24
On Monday, April 23, 2018 at 4:25:17 PM UTC-4, Jim Thompson wrote:
> Announcement: Spice Models for TC4421/TC4422 posted on my website...
>
> See TC4421-TC4422.zip on the Device Models & Subcircuits Page of my
> website.
>
> This behavioral modeling post is for announcement purposes only.
>
> To submit questions or comments, or to request assistance, please
> use the envelope icon (at top of my home page).
>
> To avoid spam filtering, follow the instructions carefully.
>
> ...Jim Thompson
> --
> | James E.Thompson | mens |
> | Analog Innovations | et |
> | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
> | STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
> | Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
> | E-mail Icon at http://www.analog-innovations.com | 1962 |
>
> Thinking outside the box... producing elegant solutions,
> by understanding what nature is hiding.
Announcement: Spice Models for TC4421/TC4422 posted on my website...
See TC4421-TC4422.zip on the Device Models & Subcircuits Page of my
website.
This behavioral modeling post is for announcement purposes only.
To submit questions or comments, or to request assistance, please
use the envelope icon (at top of my home page).
To avoid spam filtering, follow the instructions carefully.
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Thinking outside the box... producing elegant solutions,
by understanding what nature is hiding.