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Piece-wise voltage signals
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Re: Analog Devices to buy LT!
John Woodgate
¿ªÔÆÌåÓýI'm not sure that bug fixes are 'updates' in the sense used in the XVII Help text. ?I suspect Mike E would want to fix a bug if one were found. ? With best wishes DESIGN IT IN! OOO ¨C Own Opinions Only J M Woodgate and Associates Rayleigh England ? Sylvae in aeternum manent. ? From: LTspice@... [mailto:LTspice@...]
Sent: Monday, August 15, 2016 5:30 AM To: LTspice@... Subject: Re: [LTspice] Analog Devices to buy LT! ? ? That means no bug fixes to LTspice IV. So long as libraries remain compatible, including encrypted models, it should not be a big deal. Bug fixes have fallen to a very low level for IV in the last year or so, anyway and many of the ones that did happen, as I recall, were OS-related. So, if you use it on an OS that does not change (WinXP), there should be very little need for bug fixes. ? Jim ? James Wagner Oregon Research Electronics ? ? ?
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Re: Analog Devices to buy LT!
Jim,
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I wholeheartedly agree with your assessment regarding LTspice IV and, furthermore, I fully expect Mike to eventually migrate over any of the new model enhancements that catch on (IGBTs, soft diode recovery and the state machine).? Model enhancement are just more model code that does not depend on new compilers or operating systems.? New enhancements to execution speed and efficiency for LTspice IV are not as likely, however. ---In LTspice@..., <wagnejam99@...> wrote : That means no bug fixes to LTspice IV. So long as libraries remain compatible, including encrypted models, it should not be a big deal. Bug fixes have fallen to a very low level for IV in the last year or so, anyway and many of the ones that did happen, as I recall, were OS-related. So, if you use it on an OS that does not change (WinXP), there should be very little need for bug fixes. Jim James Wagner Oregon Research Electronics
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Re: Analog Devices to buy LT!
¿ªÔÆÌåÓýThat means no bug fixes to LTspice IV. So long as libraries remain compatible, including encrypted models, it should not be a big deal. Bug fixes have fallen to a very low level for IV in the last year or so, anyway and many of the ones that did happen, as I recall, were OS-related. So, if you use it on an OS that does not change (WinXP), there should be very little need for bug fixes.Jim James Wagner Oregon Research Electronics
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Re: Analog Devices to buy LT!
Hello
From LTspice XVII Help ("Software installation" section ) : " LTspice XVII runs on 32- or 64-bit editions of Windows 7, 8, or 10. Windows XP is not supported. Windows XP users can run LTspice IV1, which is still be available in observance of Linear Technology Corporation's zero obsolence tradition. " " ?? 1] LTspice IV is no longer updated " Regards PhB |
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Re: My DFF FLIPs but it does not want to FLOP
> The error message with your original circuit is caused by the
missing td or trise. Td or Trise is required for flipflops.
Unfortunately this is not mentioned in the help. There is a passage there that mentions the state changes, but it refers to tripdt, not td, trise, tau or Rout/Cout:> > Help -> Help Topics -> LTspice -> Circuit Elements -> A Special Functions "The gates and Schmitt trigger devices supply no timestep information to the simulation engine by default. That is, they don't look when they are about to change state and make sure there's a timestep close to either side of the state change. The instance parameter tripdt can be set to stipulate a maximum timestep size the simulator takes across state changes." 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: Analog Devices to buy LT!
John Woodgate
¿ªÔÆÌåÓýIt depends what you mean by 'support'. This list won't cease to support IV, and I don't suppose Mike E will, either. ?But it may be 'stabilized', i.e. not have any more improvements. ? With best wishes DESIGN IT IN! OOO ¨C Own Opinions Only J M Woodgate and Associates Rayleigh England ? Sylvae in aeternum manent. ? From: LTspice@... [mailto:LTspice@...]
Sent: Sunday, August 14, 2016 4:34 PM To: LTspice@... Subject: Re: [LTspice] Re: Analog Devices to buy LT! ? ? Ah thank you. There was no annoucment at least to me updating my LTspice 4. |
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Re: Analog Devices to buy LT!
Hello Henry,
>??Is version 4 support ongoing? At the moment LTspiceIV and LTspiceXVII provides the same number of symbols and jig-files. Thus we can assume that both versions have exactly the same models so far. This may change in the long run, but I am sure this will then be announced. Best regards, Helmut? ? |
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Re: Analog Devices to buy LT!
ehydra
Ah thank you. There was no annoucment at least to me updating my LTspice 4.
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At least in LTspice 4 sometimes the change log doesn't show updates made to the program. Meanwhile I read all the messages subject:XVII from Helmut, Vlad and analogspiceman. Is version 4 support ongoing? - Henry Vlad imbvlad@... [LTspice] schrieb: I am not sure if Mike Engelhardt actually referred to this test version(when it was a test version) as being in alpha-test. |
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Re: My DFF FLIPs but it does not want to FLOP
Hello,
The error message with your original circuit is caused by the missing td or trise. Td or Trise is required for flipflops. Unfortunately this is not mentioned in the help. Help -> Help Topics -> LTspice -> Circuit Elements -> A Special Functions Best regards, Helmut |
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Re: My DFF FLIPs but it does not want to FLOP
Gunoi Nare
Thank you Helmut. but Again, What has to do the actual error with the displayed message and how shell I guess the connection . Do you see my point? G
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Re: My DFF FLIPs but it does not want to FLOP
Hello,
Flipflops require a value td or trise. Therefore right mouse click on the flipflop. A dialog window will pop-up. Enter the following in SpiceLine. td=5n See my uploaded example "DFF 1a.asc". ? One can add the options in line Value, Value2, SpiceLine, SpiceLine2. There are many more parameters for digital devices like Vhigh, Vlow, Ref, Trise, Tfall, Td .... Vhigh is the output high level, Ref is the input threshold voltage Please take a look to this example for the options. ? ?Best regards,Helmut ? |
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Re: My DFF FLIPs but it does not want to FLOP
Well I get an upload window on Windows/10 in IE, Chrome, Firefox and even Edge!.
Are you signed into Yahoo with an account enrolled to the group? Dave From: LTspice@... [mailto:LTspice@...] Sent: 14 August 2016 12:06 To: LTspice@... Subject: Re: [LTspice] Re: My DFF FLIPs but it does not want to FLOP The UPLOAD BUTTON is not working on this link. Clicking on it nothing happens. G _____ From: "helmutsennewald@... [LTspice] <mailto:helmutsennewald@...%20[LTspice]> " <LTspice@... <mailto:LTspice@...> > To: LTspice@... <mailto:LTspice@...> Sent: Sunday, August 14, 2016 8:00 AM Subject: [LTspice] Re: My DFF FLIPs but it does not want to FLOP Hello, I don't see your file in the Files-section. Please upload it to this place below. <> Best regards, Helmut |
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Re: Analog Devices to buy LT!
On 8/13/16 10:13 AM, 'John Woodgate' jmw1937@... [LTspice] wrote:
Note quite in my experience, there are public and private betas for different products. Alpha is the first round of testing while the product is still under development. Often there are significant missing features and numerous known bugs in the alpha version, but parts are working well enough to get feedback. Because of the issues, Alpha testing tends to be confined to people close to the developer. Beta is a second round of testing. At the Beta level, the product is largely feature complete, although for larger products, there may be some sub sections of the product which may still really be at the Alpha level. Generally there are few to no 'show stopper' bugs, and the product is basically usable, but maybe not reliable. Beta testing can be sent to a wide audience, looking for bug reports and usability issues. At the end of the Beta cycle you get Release Candidates, which are feature complete, and generally believed bug free, and are looking for extensive testing to find any latent bugs. When a Release Candidate passes Quality, it becomes the Released Version. -- Richard Damon |
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Re: My DFF FLIPs but it does not want to FLOP
Gunoi Nare
The UPLOAD BUTTON is not working on this link. Clicking on it nothing happens. G
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