Varistor/MOV Spice Modeling has been updated.

See VaristorMOV.zip on the Device Models & Subcircuits Page of my
website.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson
wrote:

Varistor/MOV Spice Modeling has been updated.

See VaristorMOV.zip on the Device Models & Subcircuits Page of my
website.

...Jim Thompson

Encrypted! Not very general.

Given how imprecise MOVs are, seems like a couple of zeners and
resistors, and maybe a capacitor, would be plenty good enough.

MOVs "wear out", too. Did you include that?


--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

On Mon, 11 May 2015 10:34:26 -0700, John Larkin
wrote:

On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson
wrote:

Varistor/MOV Spice Modeling has been updated.

See VaristorMOV.zip on the Device Models & Subcircuits Page of my
website.

...Jim Thompson

Encrypted!

To conceal my techniques. Did you read... 8 lines versus 34 ??

Not very general.

Parameterizable to any MOV... read!


Given how imprecise MOVs are, seems like a couple of zeners and
resistors, and maybe a capacitor, would be plenty good enough.


Good enough for you, perhaps :-}

MOVs "wear out", too. Did you include that?

Typical Larkin sand-in-air... you can't help but be an asshole.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

On Mon, 11 May 2015 13:23:52 -0700, Jim Thompson
wrote:

On Mon, 11 May 2015 10:34:26 -0700, John Larkin
wrote:

On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson
wrote:

Varistor/MOV Spice Modeling has been updated.

See VaristorMOV.zip on the Device Models & Subcircuits Page of my
website.

...Jim Thompson

Encrypted!

To conceal my techniques. Did you read... 8 lines versus 34 ??

Not very general.

Parameterizable to any MOV... read!


Given how imprecise MOVs are, seems like a couple of zeners and
resistors, and maybe a capacitor, would be plenty good enough.


Good enough for you, perhaps :-}

Good enough for anybody. MOVs are not precise parts.



MOVs "wear out", too. Did you include that?

Typical Larkin sand-in-air... you can't help but be an asshole.

Did I hurt your feelings by not admiring your encrypted MOV model?

I really can't imagine why anyone needs to Spice a MOV. The things
that matter (power dissipation, joule capacity, wearout) aren't in the
model.


--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

"Jim Thompson" wrote
in message ...
To conceal my techniques. Did you read... 8 lines versus 34 ??

8 lines? Looks more like 20 to me.

Tim

--
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Contract Design
Website: http://seventransistorlabs.com

On Mon, 11 May 2015 17:12:03 -0500, "Tim Williams"
wrote:

"Jim Thompson" wrote
in message ...
To conceal my techniques. Did you read... 8 lines versus 34 ??

8 lines? Looks more like 20 to me.

Tim

That's LTspice's encryption scheme that adds all those extra
characters.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

"Jim Thompson" wrote
in message ...
8 lines? Looks more like 20 to me.

Tim

That's LTspice's encryption scheme that adds all those extra
characters.

Well either way, your claim is absurd, because the file size (not that 2k
files are any concern these days) certainly isn't 8 lines, and without
cracked encryption (anyone know if LTSpice / PSpice / HSpice encryption
has been cracked? anyone working on it?), impossible to verify.

There's also the possibility that fewer lines contain more math, resulting
in worse execution time or convergence anyway.

But really, I'm guessing it's your tanh fit stuff, which you've posted
about publicly before. You also claim it's based on publically published
curves. So hiding it is all the more absurd...

Tim

--
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Contract Design
Website: http://seventransistorlabs.com

On 5/11/2015 4:23 PM, Jim Thompson wrote:
On Mon, 11 May 2015 10:34:26 -0700, John Larkin
wrote:

On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson
wrote:

Varistor/MOV Spice Modeling has been updated.

See VaristorMOV.zip on the Device Models & Subcircuits Page of
my website. ...Jim Thompson

Encrypted!

To conceal my techniques.

Seems pretty pointless at your age, Jim. Are you ever going to pass on
all those pearls of wisdom, or are you going to take them to the grave
like King Tut?

Soon would be good, if you're ever going to.

Cheers

Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net

On Mon, 11 May 2015 20:58:40 -0400, Phil Hobbs
wrote:

On 5/11/2015 4:23 PM, Jim Thompson wrote:
On Mon, 11 May 2015 10:34:26 -0700, John Larkin
wrote:

On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson
wrote:

Varistor/MOV Spice Modeling has been updated.

See VaristorMOV.zip on the Device Models & Subcircuits Page of
my website. ...Jim Thompson

Encrypted!

To conceal my techniques.

Seems pretty pointless at your age, Jim. Are you ever going to pass on
all those pearls of wisdom, or are you going to take them to the grave
like King Tut?

Soon would be good, if you're ever going to.

Cheers

Phil Hobbs

Right now I'm making money at it. Why should I give away the store?
Does Larkin post a _complete_ schematic of his instruments and
manufacturing techniques here?

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

On 5/11/2015 9:04 PM, Jim Thompson wrote:
On Mon, 11 May 2015 20:58:40 -0400, Phil Hobbs
wrote:

On 5/11/2015 4:23 PM, Jim Thompson wrote:
On Mon, 11 May 2015 10:34:26 -0700, John Larkin
wrote:

On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson
wrote:

Varistor/MOV Spice Modeling has been updated.

See VaristorMOV.zip on the Device Models & Subcircuits Page of
my website. ...Jim Thompson

Encrypted!

To conceal my techniques.

Seems pretty pointless at your age, Jim. Are you ever going to pass on
all those pearls of wisdom, or are you going to take them to the grave
like King Tut?

Soon would be good, if you're ever going to.

Right now I'm making money at it. Why should I give away the store?
Does Larkin post a _complete_ schematic of his instruments and
manufacturing techniques here?

Because you're in your mid 70s. I know your dad lived into his early
90s, and was pretty sharp till the end, but there's no guarantee that
you'll do the same. What do you want your legacy to be? It's pretty
late not to be thinking about that, especially given the amount of time
and energy it will take to pass on the best of what you know in a form
accessible to young people.

John L.'s company will probably be manufacturing stuff long after he's
retired, and he isn't the sole designer, so that isn't the same case at all.

Also you vastly overestimate the opportunity cost of publishing
stuff--it's usually a net win.

My book gives away the majority of what I know about what I do, and
besides helping a lot of young folks (which was the point of the
exercise), it has been the foundation of my consulting practice. The
first edition was published when I was 40.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net

On Mon, 11 May 2015 18:04:05 -0700, Jim Thompson
wrote:

On Mon, 11 May 2015 20:58:40 -0400, Phil Hobbs
wrote:

On 5/11/2015 4:23 PM, Jim Thompson wrote:
On Mon, 11 May 2015 10:34:26 -0700, John Larkin
wrote:

On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson
wrote:

Varistor/MOV Spice Modeling has been updated.

See VaristorMOV.zip on the Device Models & Subcircuits Page of
my website. ...Jim Thompson

Encrypted!

To conceal my techniques.

Seems pretty pointless at your age, Jim. Are you ever going to pass on
all those pearls of wisdom, or are you going to take them to the grave
like King Tut?

Soon would be good, if you're ever going to.

Cheers

Phil Hobbs

Right now I'm making money at it. Why should I give away the store?

An MOV model is "the store"? That's sort of sad.

Does Larkin post a _complete_ schematic of his instruments and
manufacturing techniques here?

...Jim Thompson

Sometimes I post actual product schematics, usually sheets relevant to
the topic, and photos of real boxes and boards. Sometimes I post
(non-encrypted!) Spice files. Sometimes I post ideas and scribbles
that I just imagined.

I don't post manufacturing techniques, because my production people do
that, and it's fairly standard stuff. I have posted a lot of
breadboarding techniques, stuff that I do myself.

I don't post encrypted Spice circuits and then tell people that I'm
smart, just because I say so.

I still don't know why your thing would be any better than a couple of
zeners and resistors, and you won't say why.


--

John Larkin Highland Technology, Inc
picosecond timing laser drivers and controllers

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

"Phil Hobbs" wrote in message
...
Seems pretty pointless at your age, Jim. Are you ever going to pass on
all those pearls of wisdom, or are you going to take them to the grave
like King Tut?

On a related note then, if anyone has something they'd like to model, I
could take a crack at it.

I suspect Jim isn't doing anything I don't know, and if he sees some
examples, maybe he'd even admit what it is, too ;-)

Tim

--
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Contract Design
Website: http://seventransistorlabs.com

"Tim Williams" wrote:
"Phil Hobbs" wrote in message
...
Seems pretty pointless at your age, Jim. Are you ever going to pass on
all those pearls of wisdom, or are you going to take them to the grave
like King Tut?

On a related note then, if anyone has something they'd like to model, I
could take a crack at it.

I suspect Jim isn't doing anything I don't know, and if he sees some
examples, maybe he'd even admit what it is, too ;-)

Tim

Perhaps not the right place in the thread to say this, but what problems
would come up if you modelled a varistor as a behavioural current source
with I = k* V^alpha in series with a bulk resistance? I've had pretty good
luck with that model (just not in SPICE).

On Tue, 12 May 2015 04:59:44 -0500, "Tim Williams"
wrote:

"Phil Hobbs" wrote in message
...
Seems pretty pointless at your age, Jim. Are you ever going to pass on
all those pearls of wisdom, or are you going to take them to the grave
like King Tut?

On a related note then, if anyone has something they'd like to model, I
could take a crack at it.

I suspect Jim isn't doing anything I don't know,

Bwahahahahahaha! I needed a laugh right now.

and if he sees some
examples, maybe he'd even admit what it is, too ;-)

Tim

How about an NCP1072? That was requested on the LTspice List :-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.