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Qspice Beta Testers

I know nothing about it, but there is discussion on this IOgroup,

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Dear Group! The simulator I've been working on for the last three years, mentioned here under its code name of S·P·Q·R, will beta imminently as QSPICE. QSPICE(S·P·Q·R) started out as a mission to get SPICE right. I started anew with the open sources. Found bugs in Kundurt's Sparse Matrix Package that I think can only be found if starting anew with code one already knows. The timestep control is also entirely rearchitected. But with the help of affiliations with a number of IC design and manufacturing concerns, it turned out to be more than just a more robust and faster analog SPICE program. QSPICE allows one to include massive amounts of digital. I'm humbled that the simulator turned out better than I could have expected. QSPICE responds to the fact that simulation requirements change. If you wish to participate in the Qorvo QSPICE beta, which is coming soon, you can sign up at
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Mike Engelhardt Author of QSPICE

Reply to
Lamont Cranston
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I signed up !

Qorvo was by the other day showing us their United SiC FETs and was surprised I knew about Qspice and the affiliation. I am sure it is going to be a very cool simulator. Can't wait to try it.

boB

Reply to
boB

This could be very interesting: The Grandmaster started with a clean sheet, unhindered by the vast existing spaghetti codebase, or IP conflicts and tangles.

I bet that QSPICE's code memory footprint is far smaller than LTspice.

I signed up as a beta tester as well.

Joe Gwinn - who started with Spice 3f.5, and read Nagle's PhD Thesis at least two decades ago.

Reply to
Joe Gwinn

I've never been a beta tester. LTSpice IV is what I live by. What are the obligations of the tester?

Reply to
John S

Tell them about anything that doesn't work, in enough detail that they can reproduce the fault.

Much the same as being a Microsoft user, in practice. The assumption is that there will be more faults than in software you've paid for.

Reply to
Anthony William Sloman

I wonder if it will have a modern UI, rather than the DOS inspired, logically inverted, bit of renaissance coding that LTspice is?

I'm thinking not, since it's being written by the same guy, but I'm willing to give it a chance.

Reply to
Ricky

Mike wrote LT spice from scratch. It's a true compiler and doesn't use the Berkeley code base. Code footprint doesn't matter any more, with common apps taking hundreds of megabytes. The runtime RAM use of LT Spice is initially 4.5 megabytes, and under 12M running and plotting the 6BK4 sim. Firefox is over 1G.

Next, I want Spice models for their RF parts.

Reply to
John Larkin

Upgrade to XVII! It's worth the small hassle.

Reply to
John Larkin

Now that you mention it, I think I knew that once.

Yes, we always had this problem with libraries, but many of those libraries were written for the purpose, and a simpler core is likely to pull less in. We shall see.

And old code gets pretty crufty, and it's necessary to burn it to the ground and start over from time to time. Cue "Tobacco Road":

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There may be hope, because from Mike's talk it sounds like Qorvo bought into Mike's business model as well.

Joe Gwinn

Reply to
Joe Gwinn

Evidently the new LTspice 17.1 doesn't support schematic preview while browsing for files. :{ I'll get over it -

boB

Reply to
boB

The little thumbnails? They are too tiny to be useful.

But I hope Analog Devices doesn't ruin LT Spice.

I guess I should save a backup copy of the current one, in case they do wreck it.

Reply to
John Larkin

Just big enough to see at least how complicated the schematic is.

Me too.

Instead of just letting LTspice update from within the program, I download the .EXE or now, the .MSI files that contain the complete installation and put the date and/or the version number in the file name. So if a version screws something up, I can always go back to an older version. Disk space is cheap for this purpose.

boB

Reply to
boB

Yup. They’ve already broken the part selection dialogue—it goes out to lunch for several seconds when you start typing.

Reply to
Phil Hobbs

Does the .msi file need online access to install?

Reply to
John Larkin

Looks like the Win7 version XVII is unsupported now.

Reply to
John Larkin

No. It's the whole LTspice program.

Being able to install LTspice completely offline is important to me, too.

boB

Reply to
boB

At least those versions are completely usable and installable.

boB

Reply to
boB

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