Re: Visay optocoupler

pietervanpoecke?wrote:

? ?"I'am searching for the spice model of the visay optocoupler SFH 618A-2 and SFH618A-4. Can somebody help me?"

I don't know if this helps.? I did a quick search but didn't find one.? However, Vishay has SPICE models for parts with similar part numbers: SFH615A and SFH617A.? I don't know what is different between these and the SFH618A, and whether you can adapt one of them to it. ?(Sometimes one gets real lucky and two part numbers are actually the same device in a different package.)

You might also try asking Vishay if they have the model for your part already.

By the way, it is "Vishay", not "visay".

Andy

Re: LTspice XVII Co-exist with LTspice IV?

#90366

At 07:08 AM (-0700) 8/15/2016, Helmut Sennewald wrote:

---------- Original Message ----------
Hello Jim,

I have installed LTspiceIV and LTspiceXVII on the same PC.. I see no problem so far.

LTspiceXVII will be automatically installed in "Program Files" while LTspiceIV is installed in "Program Files (x86)".

Best regards,
Helmut---------- End of Original Message ----------

Are LTspice XVII schematics still *.asc?  If so, which program version do you assign as "Open with"?

     ...Jim Thompson

     Web Site: <>

Re: MAC - Software Update Seems To Fail

[email protected]

#90365

Helmut,

Thank-You for taking the time to confirm the behavior experienced with the software update.

Now, at least, other Mac users can see this topic and know that they are not alone if this issue

is encountered.?

I'll send an e-mail to Mike to inform him of the problem.

Regards,

-jack

Re: MAC - Software Update Seems To Fail

John Woodgate

#90364

开云体育

Well, it might have worked. (Saddest sentence that exists!). So now I agree with Helmut; report the issue to Mike E.

?

With best wishes DESIGN IT IN! OOO – Own Opinions Only

J M Woodgate and Associates Rayleigh England

?

Sylvae in aeternum manent.

?

Show quoted text

From: LTspice@... [mailto:LTspice@...]
Sent: Monday, August 15, 2016 4:05 PM
To: LTspice@...
Subject: RE: [LTspice] MAC - Software Update Seems To Fail

?

Hi John,

?

Thank-You for the reply, but (re) downloading from the official site and reinstalling does not work either.

?

Please note that this is the Mac OS version.

?

-jack

?

Re: MAC - Software Update Seems To Fail

#90363

Hello Jack,

I just tested your case. Indeed MAC-LTspice always reports "not updated since 126 days". The reason for that seems to be that the last version has been from Apr 11 2016. One will get a similar message on LTspiceIV when not updated for more than 100? days. I updated now MAC-LTspice on my MAC and checked for the latest added part LT8335. It"s in the library now. This means all the models are up to date after the update. I recommend to regularly update to get the latest models.

I guess it"s the first time that there were so long no program update for MAC-LTspice. I wouldn't worry about this message. Nevertheless you could write a message to Mike, the author of LTspice - LTspice@.... I am not sure he can quickly fix this due to the actual work on LTspiceXVII.

Best regards,

Helmut

Re: MAC - Software Update Seems To Fail

[email protected]

#90362

Hi John,

Thank-You for the reply, but (re) downloading from the official site and reinstalling does not work either.

Please note that this is the Mac OS version.

-jack

Re: MAC - Software Update Seems To Fail

John Woodgate

#90361

开云体育

Uninstall it and re-install a download from the official LT web site.

?

With best wishes DESIGN IT IN! OOO – Own Opinions Only

J M Woodgate and Associates Rayleigh England

?

Sylvae in aeternum manent.

?

Show quoted text

From: LTspice@... [mailto:LTspice@...]
Sent: Monday, August 15, 2016 3:21 PM
To: LTspice@...
Subject: [LTspice] MAC - Software Update Seems To Fail

?

Starting Saturday (08/13), every time LTspice is started it continually requests that a software update be performed despite having already attempted the operation several times. Seems like either the internal URL used for the request does not have the latest version; or, some internal status is not being set when the new version is installed. Please note that the model updates appear to work properly.

?

Any/all help is appreciated.

?

Thank-You,

-jack

?

Re: I'm ready to give up LTC all toghether.

#90358

At 07:08 AM (-0700) 8/15/2016, davnor49 wrote:

---------- Original Message ----------
G,

Calm down for five minutes and consider all those who had to design circuits without circuit simulators and nice assemblers to write machine code for them.

Dave N---------- End of Original Message ----------

Yep.  I amuse myself periodically by remembering that I designed ASIC's for 18 years before I had my hands on a simulator, and that was Berkeley Spice 2G6 on a VAX.  And there was no schematic capture... I had to draw schematics on paper, number the nodes, then type up a netlist :-D

In a way I think that's an advantage... I design circuits in my head, on paper, and with a calculator, then enter them into a simulator for verification.

I find that many young engineers have no ability to IMAGINE a circuit.

     ...Jim Thompson

     Web Site: <>

Re: BRF91 LTSPice Model

#90357

Thank you very much friends :)

MAC - Software Update Seems To Fail

[email protected]

#90360

Starting Saturday (08/13), every time LTspice is started it continually requests that a software update be performed despite having already attempted the operation several times. Seems like either the internal URL used for the request does not have the latest version; or, some internal status is not being set when the new version is installed. Please note that the model updates appear to work properly.

Any/all help is appreciated.

Thank-You,

-jack

Re: LTspice XVII binary log files

#90356

Hello pedal_carl

With LTspice XVII files .net? and? .log DO ARE coded in Unicode UTF-16LE without BOM.

If you want them as you did with LTspice iV you can open files with notepad and save them in format ANSI.

Regards
PhB

Visay optocoupler

#90359

Hey,

I'am searching for the spice model of the visay optocoupler SFH 618A-2 and SFH618A-4. Can somebody help me?

Visay spice model Bridge rectifier KBU6B

#90355

Hey,

I'am searching for the spice model Bridge rectifier KBU6B. Can somebody help me?

Re: LTspice XVII Co-exist with LTspice IV?

#90354

Hello Jim,

I have installed LTspiceIV and LTspiceXVII on the same PC.. I see no problem so far.

LTspiceXVII will be automatically installed in "Program Files" while LTspiceIV is installed in "Program Files (x86)".

Best regards,

Helmut

Re: LTspice XVII Co-exist with LTspice IV?

#90353

On my home computer has these two programs. True, I set XVII to drive D :. I run any program. There is no conflict.

Bordodynov.

15.08.2016, 16:31, "Jim Thompson ltlist@... [LTspice]" <ltspice@...>:

Show quoted text

Can LTspice XVII Co-exist with LTspice IV on the same machine without
conflicts?

...Jim Thompson

Web Site: <>

LTspice XVII Co-exist with LTspice IV?

#90352

Can LTspice XVII Co-exist with LTspice IV on the same machine without conflicts?

     ...Jim Thompson

     Web Site: <>

Re: I'm ready to give up LTC all toghether.

#90351

I also do not understand why the characters do not have the required parameters. Many people come to rake because of this. Since LtspiceIV in the near future will not be updated (if ever updated), then you yourself can change the characters of A-type. I advise you to make a reserve of symbols changed. Then you will simply use logic gates. I think the default is to make the output levels 5V and td = 5ns, Trise = 2.5 ns.

Bordodynov.

15.08.2016, 16:13, "Gunoi Nare gunoiar@... [LTspice]" <ltspice@...>:

Show quoted text

Yes, Helmut, i saw it.
However, I was looking for a definition of Trise etc. that really does not exist in the help file..
From what level to what level is the simulator considering the rise of a signal?
Is Trise a .parameter , a key word or what?. How do you handle it' s substitutions.
i guess you understand .

BTW. If you leave unused pins of the gate just floating, how do you simulate latch-up conditions?

I belive that the digital lib has a lot to desire. Some standard values had to be plugged in the symbols so they would be imediattely usable. If the user needs to tweak them, so be it.

Is there a way for me to modify the lib so the components would have already some dummy values?

One more time, thank you.
g

----------------------------------------
From: "helmutsennewald@... [LTspice]" <LTspice@...>
To: LTspice@...
Sent: Monday, August 15, 2016 9:29 AM
Subject: Re: [LTspice] Re: I'm ready to give up LTC all toghether.

Hello G.,

There is a more general description in the Help, but not exactly an example with your case.

Help -> LTspice XVII-> LTspice -> Dot Commands -> .PARAM

Best regards,
Helmut

Re: I'm ready to give up LTC all toghether.

#90350

Hello,

>?BTW. If you leave unused pins of the gate just floating, how do you simulate latch-up conditions?

I guess you haven't heard about the idea of the digital A-devices. These devices should be as fast as possible in the simulation and only add small complexity.

Unused pins should be left open. This allows the compiler to reduce a five-input AND to a two input AND when you only apply two signals.?

When you want simulate latchup, you have to create and a add subcircuit with a ?SCR structure. Before you waste time on that, you have to characterize the latchup behavior of the target IC.

Best regards,

Helmut

?

Re: I'm ready to give up LTC all toghether.

Gunoi Nare

#90349

If you ever think that you have found something FREE,

THINK AGAIN

G

Show quoted text

From: "iamrogerholden@... [LTspice]"
To: LTspice@...
Sent: Monday, August 15, 2016 10:11 AM
Subject: [LTspice] Re: I'm ready to give up LTC all toghether.

?

Don't do down one of the most brilliant pieces of freeware ever!
If you want exhaustive help files and training try paying lot's and lot's of $$$$ for a product.? As for myself and am sure many many others we don't have $$$$$ and rely on people such as those at Lt to give away there hard work for free for the benefit of others.? I think as you use it will grow on you...good luck :)

Re: I'm ready to give up LTC all toghether.

[email protected]

#90347

Don't do down one of the most brilliant pieces of freeware ever!
If you want exhaustive help files and training try paying lot's and lot's of $$$$ for a product.? As for myself and am sure many many others we don't have $$$$$ and rely on people such as those at Lt to give away there hard work for free for the benefit of others.? I think as you use it will grow on you...good luck :)