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Re: Analog Devices to buy LT!
¿ªÔÆÌåÓýAlready too much speculation is going on in this thread, mostly by people who don't understand the arcanes of a big company. It's not worthy of a supposedly scientific group. Le 28/07/2016 ¨¤ 20:09, Jim Wagner
wagnejam99@... [LTspice] a ¨¦crit?:
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Re: Analog Devices to buy LT!
¿ªÔÆÌåÓýI generally have found over the last 30 years of business that postulating about how businesses are re-organized is pointless. ? I came to the conclusion that Managers were reading my brain and doing the exact opposite. ? So anything could happen, I might even win the UK National Lottery¡ ? Dave G4UGM ? From: LTspice@... [mailto:LTspice@...]
Sent: 28 July 2016 20:04 To: [LTspice] group Subject: Re: [LTspice] Re: Analog Devices to buy LT! ? ? ?"Who own the right of LTspice ? company or Mike the author ?" ? When you click Help -> About LTspiceIV, you will see that Linear Technology owns the copyright of LTspice, and Mike is the Author.? I would also guess that LTC owns the product, just like all the ICs their employees have designed. ? Like most products, if an employee leaves a company, the things they designed for the company, remain the property of the company.? Otherwise, a lot of products would mysteriously disappear from a company's product line, when its designer(s) happened to switch jobs.? That generally doesn't happen. ? ? ?"If so, the support of LTspice might be not so much." ? Remember that LTspice is supported not only by Mike. ? ? ?"If Mike leaves...nothing stopping him from ? ? ?? developing a new "LTspice compatible" ? ? version of simulation software..." ? Well, that's where it gets a lot less clear.? There may be things stopping that. ? Many companies, especially in the technology sector, have non-compete provisions, which deny a former employee from developing a new version of their old product for a period of time, and/or developing the same product elsewhere.? For him to come up with a new LTspice-like simulator, either it would have to be significantly different (no code or algorithms he developed while at LTC), or it would have to be with ADI's permission to take it with him -- essentially a spin-off? ? Regardless, all this is meaningless speculation.? We have no reason to believe that ADI would not continue to support LTspice, nor that Mike would leave. ? Regards, Andy (also not an employee of either Linear Technology or Analog Devices) ? ? |
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Sub circuit heat dissipation not showing
Hello, I am relatively new at LTspice. I was wondering why a sub circuit for TIP142 and TIP147 doesn¡¯t calculate the heat dissipation when I run my circuit and hover over the symbol with the ALT key held down. All I see is the apparent formula. This feature works in non-darlingtons.? ?
Thanks, Brad |
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Re: Analog Devices to buy LT!
John Woodgate
I think all this speculation is unwise. It just might give some corporate nincompoop the idea of putting a price on the product. A price compatible with its excellence. OIEO 10*X kilobucks.
With best wishes DESIGN IT IN! OOO ¨C Own Opinions Only <> www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England Sylvae in aeternum manent. From: LTspice@... [mailto:LTspice@...] Sent: Thursday, July 28, 2016 8:04 PM To: [LTspice] group <LTspice@...> Subject: Re: [LTspice] Re: Analog Devices to buy LT! "Who own the right of LTspice ? company or Mike the author ?" When you click Help -> About LTspiceIV, you will see that Linear Technology owns the copyright of LTspice, and Mike is the Author. I would also guess that LTC owns the product, just like all the ICs their employees have designed. Like most products, if an employee leaves a company, the things they designed for the company, remain the property of the company. Otherwise, a lot of products would mysteriously disappear from a company's product line, when its designer(s) happened to switch jobs. That generally doesn't happen. "If so, the support of LTspice might be not so much." Remember that LTspice is supported not only by Mike. "If Mike leaves...nothing stopping him from ? ? developing a new "LTspice compatible" version of simulation software..." Well, that's where it gets a lot less clear. There may be things stopping that. Many companies, especially in the technology sector, have non-compete provisions, which deny a former employee from developing a new version of their old product for a period of time, and/or developing the same product elsewhere. For him to come up with a new LTspice-like simulator, either it would have to be significantly different (no code or algorithms he developed while at LTC), or it would have to be with ADI's permission to take it with him -- essentially a spin-off? Regardless, all this is meaningless speculation. We have no reason to believe that ADI would not continue to support LTspice, nor that Mike would leave. Regards, Andy (also not an employee of either Linear Technology or Analog Devices) |
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Re: Analog Devices to buy LT!
? ?"Who own the right of LTspice ? company or Mike the author ?" When you click Help -> About LTspiceIV, you will see that Linear Technology owns the copyright of LTspice, and Mike is the Author.? I would also guess that LTC owns the product, just like all the ICs their employees have designed. Like most products, if an employee leaves a company, the things they designed for the company, remain the property of the company.? Otherwise, a lot of products would mysteriously disappear from a company's product line, when its designer(s) happened to switch jobs.? That generally doesn't happen. ? ?"If so, the support of LTspice might be not so much." Remember that LTspice is supported not only by Mike. ? ?"If Mike leaves...nothing stopping him from ? ? ?? developing a new "LTspice compatible"? ? version of simulation software..." Well, that's where it gets a lot less clear.? There may be things stopping that. Many companies, especially in the technology sector, have non-compete provisions, which deny a former employee from developing a new version of their old product for a period of time, and/or developing the same product elsewhere.? For him to come up with a new LTspice-like simulator, either it would have to be significantly different (no code or algorithms he developed while at LTC), or it would have to be with ADI's permission to take it with him -- essentially a spin-off? Regardless, all this is meaningless speculation.? We have no reason to believe that ADI would not continue to support LTspice, nor that Mike would leave. Regards, Andy (also not an employee of either Linear Technology or Analog Devices) |
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Re: Analog Devices to buy LT!
¿ªÔÆÌåÓýIf Mike leaves...nothing stopping him from developing a new "LTspice compatible" version of simulation software... On Jul 28, 2016, at 11:09 AM, Jim Wagner wagnejam99@... [LTspice] <LTspice@...> wrote:
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Re: Analog Devices to buy LT!
Ownership is not clear from the outside. I would expect it to be the company, but in the murky world of Silicon Valley, it could be anything. What might happen if Mike leaves the company? That is even less clear. He is so crucial to the development of LTspice that it could not but have a negative impact. For those of us "outside", we can only wait and see how the dust settles. Jim James Wagner Oregon Research Electronics From: "ericsson.sunshine@... [LTspice]" To: "LTspice" Sent: Thursday, July 28, 2016 7:55:16 AM Subject: [LTspice] Re: Analog Devices to buy LT! Hi, : May I ask a question. "Who own the right of LTspice ? company or Mike the author ?" Will this be a problem ? if Mike the author decide to ?leave the new company ? If so, the support of LTspice might be not so much. Best regards.
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Re: Schottky Diode Models
Hi.
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it is BV, iBv for TEMP=25 iIeak=500n and 100microA at 100C (exp(TEMP-27)/x) x=? Bordodynov. 28.07.2016, 19:58, "4vl7aujnwrex7ropketfjd7le5afsie4zyue7rcb@... [LTspice]" <ltspice@...>: Bordodynov |
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Re: vc pot with internal resistance
Well, I thought I'd amuse myself a bit, so here's a new view on the variable potentiometer: . Good for mildly amusing soirees. Vlad ______________________ -- holding, among others: a universal analog/digital filter, block-level models for power electronics (and not only), math blocks with a more stream-lined approach, some digital ADC, DAC, (synchronous-)counter, JKflop, etc. |
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Re: course of HOWTO build models like (sanken) STR-A6100
ericsson.sunshine?wrote: ? ?"But the most significant one is that I had been aware of the waveform of FB comparator's ... ? ? The picture in page.15 shown that the Vsc should be a vertical straight line ..." I think you meant to write *horizontal* line. ? ?"...?but my simulation shows it's rippled ..." You did say that ANY opinion is appreciated, so here is mine.? This is based on knowing nothing about the device, the datasheet, or the SPICE model. I'm guessing the waveforms in that plot on page 15 are idealistic, not realistic. It is an internal voltage inside the IC, right?? Chances are it won't be steady, not a straight flat line.? I don't know what drives it, because the figure in the datasheet shows an empty box going to that node.? Is the voltage on the FB/OLP pin steady?? I guess it must be rippled too. Your uploaded file doesn't have the "TL431(TI)" (both symbol and model). Andy |
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Is direct contact okay?
analogspiceman Are you okay to help me out directly based on the simulations you have posted in the LTSpice Group? I would appreciate some help (for now at least) with simulating an actual Current Transformer (CT), starting from e.g. your "CurrentSense.asc" simulation. I do not really want to ask detailed questions relating to our R&D Application in a Public Forum. Thanks and Regards Henry Kafeman Sent from Yahoo Mail. |
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Re: Analog Devices to buy LT!
¿ªÔÆÌåÓýthis works:
? ? ? From: LTspice@... [mailto:LTspice@...]
Sent: Thursday, July 28, 2016 9:17 AM To: [LTspice] group Subject: Re: [LTspice] Re: Analog Devices to buy LT! ? ? ? ?"They still need more microwave capability, per the LT people..." ? ADI did acquire Hittite Microwave, a couple of years back. ? That one was rather disappointing because they took down Hittite's website (for a while they didn't even re-direct it to !), and they didn't make it easy to find anything about Hittite's product line.? Maybe that's been fixed. ? Andy ? ?
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Re: course of HOWTO build models like (sanken) STR-A6100
Hi, :
I have done the (sanken) STR-A6100 sub-circuit for test, but this is the first time I do this thing (make spice model of some vendor by myself). I am not sure (not confident) that it's good. file is at: Can someone (familiar with this stuff (power IC, flyback)) provide some suggestions ? In fact, I have many questions that can't be answered ,almostly is the parameters like, charging current (Ix), and FB comparator's divider res, Ishunt gain, etc. But the most significant one is that I had been aware of the waveform of FB comparator's +,- (inverting & non-inverting) , these named "Vocpm" & "Vsc" in the datasheet at page.15. The picture in page.15 shown that the Vsc should be a vertical straight line, but my simulation shows it's rippled, though the output seems a little bit well. I just not sure whether it's right or not, I don't have the answer. Any opinion is appreciating. ? Best regards. |
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Re: Analog Devices to buy LT!
? ?"They still need more microwave capability, per the LT people..." ADI did acquire Hittite Microwave, a couple of years back. That one was rather disappointing because they took down Hittite's website (for a while they didn't even re-direct it to !), and they didn't make it easy to find anything about Hittite's product line.? Maybe that's been fixed. Andy ? |
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Re: Analog Devices to buy LT!
¿ªÔÆÌåÓýMy concern is that Mike will choose not to stay. Since LTspice seems to be a one-man show, it could be quite vulnerable to ¡°disenchantment¡±.Jim James Wagner Oregon Research Electronics
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Re: Analog Devices to buy LT!
IF this sale goes through....and IF this acquisition does not become the target of yet another takeover (the
Chinese have been buying lots of American companies...and British/UK companies as of late)...this might be ?good news around here..at least what has been mentioned so far. Click on John's link and see the chart on ?the top 10 chip makers. They still need more microwave capability, per the LT people...with something like the Skyworks positions and cell phone chip sets (and rf industry -- military items)...not the Intel wireless stuff. TI by the way has special patents on Ballistic Millimeterwave and Terahertz devices see: Time will tell, but at least we (and the LTSPICE community) are still on a decent gravy train...nothing like what happened to Microwave Office and ANSOFT. W. Warren ? ? |
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Re: Schottky Diode Models
Bordodynov Thank you for the file LeakShottky.zip That looks better and I think matches the BAR43SFILM "Typical" Specification. It has e.g. 28.13microA Reverse Leakage Current at 30V and 100C. But could you tell me how the values in the model should be changed to match the worst case stated values? - e.g. Maximum Reverse Leakage Current at 30V of 500nanoA at 25C and 100microA at 100C. The Datasheet for the BAR43SFILM is here: Thanks Henry ? Sent from Yahoo Mail. On Thursday, July 28, 2016 7:52 AM, "§¡§Ý§Ö§Ü§ã§Ñ§ß§Õ§â §¢§à§â§Õ§à§Õ§í§ß§à§Ó BordodunovAlex@... [LTspice]" wrote:
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Hello.
See file LeakShottky.zip in TEMP folder. Bordodynov. 27.07.2016, 19:53, "helmutsennewald@... [LTspice]" : > Hello Henry, > > The value for N is by far too high. It should be more realistic between 1 and 2. > Maybe they feed less useful measurement data into their curve fitter. > > .model dx??? D(IS=480.77E-6 N=4.9950 RS=40.150E-3 IKF=20.507 EG=.69 XTI=2 CJO=13.698E-12 > +??? ??? ??? M=.50005 VJ=.38464 ISR=10.010E-21 FC=0.5 NR=4.9950 TT=0) > > Best regards, > Helmut > > |
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