On 5/11/2015 9:04 PM, Jim Thompson wrote:> On Mon, 11 May 2015 20:58:40 -0400, Phil Hobbs > <pcdhSpamMeSenseless@electrooptical.net> wrote: > >> On 5/11/2015 4:23 PM, Jim Thompson wrote: >>> On Mon, 11 May 2015 10:34:26 -0700, John Larkin >>> <jlarkin@highlandtechnology.com> wrote: >>> >>>> On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson >>>> <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> 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
Update: Varistor/MOV Spice Modeling
Started by ●May 10, 2015
Reply by ●May 11, 20152015-05-11
Reply by ●May 11, 20152015-05-11
On Mon, 11 May 2015 18:04:05 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Mon, 11 May 2015 20:58:40 -0400, Phil Hobbs ><pcdhSpamMeSenseless@electrooptical.net> wrote: > >>On 5/11/2015 4:23 PM, Jim Thompson wrote: >>> On Mon, 11 May 2015 10:34:26 -0700, John Larkin >>> <jlarkin@highlandtechnology.com> wrote: >>> >>>> On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson >>>> <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> 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 ThompsonSometimes 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
Reply by ●May 11, 20152015-05-11
On Mon, 11 May 2015 21:17:42 -0400, Phil Hobbs <hobbs@electrooptical.net> wrote:>On 5/11/2015 9:04 PM, Jim Thompson wrote: >> On Mon, 11 May 2015 20:58:40 -0400, Phil Hobbs >> <pcdhSpamMeSenseless@electrooptical.net> wrote: >> >>> On 5/11/2015 4:23 PM, Jim Thompson wrote: >>>> On Mon, 11 May 2015 10:34:26 -0700, John Larkin >>>> <jlarkin@highlandtechnology.com> wrote: >>>> >>>>> On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson >>>>> <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> 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 HobbsOK. I'll divulge all my "secrets": (1) All derivatives must exist and be continuous (2) All functions must be BOUNDED smoothly, per (1) above. That's all there is to it other than knowing circuit design at the device level which you can pick up easily with 50 or so years or experience >:-} Seriously. More seriously, leukemia testing begins tomorrow. I'll consider your advice... maybe it is time to do a load dump. ...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 | | | Voice:(480)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.
Reply by ●May 11, 20152015-05-11
On 5/11/2015 9:51 PM, Jim Thompson wrote:> On Mon, 11 May 2015 21:17:42 -0400, Phil Hobbs > <hobbs@electrooptical.net> wrote: > >> On 5/11/2015 9:04 PM, Jim Thompson wrote: >>> On Mon, 11 May 2015 20:58:40 -0400, Phil Hobbs >>> <pcdhSpamMeSenseless@electrooptical.net> wrote: >>> >>>> On 5/11/2015 4:23 PM, Jim Thompson wrote: >>>>> On Mon, 11 May 2015 10:34:26 -0700, John Larkin >>>>> <jlarkin@highlandtechnology.com> wrote: >>>>> >>>>>> On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson >>>>>> <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> 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 > > OK. I'll divulge all my "secrets": > > (1) All derivatives must exist and be continuous > (2) All functions must be BOUNDED smoothly, per (1) above. > > That's all there is to it other than knowing circuit design at the > device level which you can pick up easily with 50 or so years or > experience >:-} > > Seriously. > > More seriously, leukemia testing begins tomorrow. > > I'll consider your advice... maybe it is time to do a load dump. > > ...Jim Thompson >I'm praying for good test results for you. 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
Reply by ●May 12, 20152015-05-12
On Mon, 11 May 2015 18:42:16 -0700, John Larkin <jlarkin@highlandtechnology.com> wrote:>On Mon, 11 May 2015 18:04:05 -0700, Jim Thompson ><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > >>On Mon, 11 May 2015 20:58:40 -0400, Phil Hobbs >><pcdhSpamMeSenseless@electrooptical.net> wrote: >> >>>On 5/11/2015 4:23 PM, Jim Thompson wrote: >>>> On Mon, 11 May 2015 10:34:26 -0700, John Larkin >>>> <jlarkin@highlandtechnology.com> wrote: >>>> >>>>> On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson >>>>> <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> 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.GFYU ...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 | | | Voice:(480)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.
Reply by ●May 12, 20152015-05-12
On Mon, 11 May 2015 20:48:20 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Mon, 11 May 2015 18:42:16 -0700, John Larkin ><jlarkin@highlandtechnology.com> wrote: > >>On Mon, 11 May 2015 18:04:05 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Mon, 11 May 2015 20:58:40 -0400, Phil Hobbs >>><pcdhSpamMeSenseless@electrooptical.net> wrote: >>> >>>>On 5/11/2015 4:23 PM, Jim Thompson wrote: >>>>> On Mon, 11 May 2015 10:34:26 -0700, John Larkin >>>>> <jlarkin@highlandtechnology.com> wrote: >>>>> >>>>>> On Sun, 10 May 2015 08:46:07 -0700, Jim Thompson >>>>>> <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> 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. > >GFYU > > ...Jim ThompsonAfter you get well, you're welcome to try. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●May 12, 20152015-05-12
"Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in message news:55515040.8030806@electrooptical.net...> 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
Reply by ●May 12, 20152015-05-12
"Tim Williams" <tiwill@seventransistorlabs.com> wrote:> "Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in message > news:55515040.8030806@electrooptical.net... >> 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 ;-) > > TimPerhaps 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).
Reply by ●May 12, 20152015-05-12
On Tue, 12 May 2015 04:59:44 -0500, "Tim Williams" <tiwill@seventransistorlabs.com> wrote:>"Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in message >news:55515040.8030806@electrooptical.net... >> 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 ;-) > >TimHow 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 | | | Voice:(480)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.
Reply by ●May 12, 20152015-05-12
On Tue, 12 May 2015 13:03:16 GMT, Ralph Barone <address_is@invalid.invalid> wrote:>"Tim Williams" <tiwill@seventransistorlabs.com> wrote: >> "Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in message >> news:55515040.8030806@electrooptical.net... >>> 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).How about a resistor, diode, voltage source? A couple in parallel if you want some curvature. Bridge rectifier if you need bipolar. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
