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Hello Gerd, Have you tried the option topologycheck? I am not sure it will help in your case. .options topologycheck 0 Best regards, Helmut

Hello! You can try and enjoy .MODEL 2SC2922 NPN (IS=122.9N XTI=3 EG=1.11 VAF=100 BF=87.13 ISE=122.9N + NE=1.677 IKF=99.99 NK=1.384 XTB=1.5 VAR=100 BR=1 ISC=0 NC=2 + IKR=0 RC=0 CJC=2P MJC=.3333 VJC=.75

Hello, can I make LTspice stop telling all the warnings & failures? I know it's valuable information, but sometimes (when the sim ends up successfully anyway) I'm not interested in that plus, I don't

Thanks for your help, that method certainly works, but the problem is that in 6 months time I will have forgotten that this FET is there. You've said that for parts to included in the 'pick new

A current source may be paralleled with a resistance to make a Norton equivalent of a non-ideal voltage source (i.e., one that includes a built-in realistic output resistance). The current source form

Hi Helmut, Thanks for the reminder about the option "Cshunt" (Gesundheit!). When new options are added it's easy to forget they are there, but whe

Hello Andy, Just add a SPICE comamnd(directive) line to your schematic. .include irlms6702.spi This is a subcircuit model. In old SPICE you would use it with X1 100 23 97 irlms6702 Nowadays we use a

For parts to function in the right-mouse-click menu selectable libraries they must be defined with .model statements not subcircuits. IR MOSFET subcircuits are reasonably well written and generally

Hello Jim, You are in luck. Mike has added a new option which helps in some cases for better convergence. This option adds a capacitor from each node to node 0(GND). Be careful with it's value.

I'm relatively new to spice modelling, I hope this isn't too dumb a question. I've downloaded the spice model of a FET I want to use, which is the irlms6702 - a P channel logic level FET, but the file

Hi all: I read thru the email history of the AD633 multiplier. Indeed, the singular matrix errors still exist with the ADI supplied netlist. Does anyone have a working model of this part? regards- jim

No problem, Udo ... Any time ... You're more than welcome. :) LTspice is as pleasurable as it is powerful, isn't it? With Friendly Greetings (really) -- analogspiceman PS: free advice is worth every

Hello analogspiceman, thank you for the fast response and pushing my nose on u(x). Best regards Udo

Hello Sander, I can't help with the 2SA1216 and 2SC2922. For the others you can start from the group's "Links" if you have an idea about the possible manufacturers. Links > Spice Models > Models from

I just did the same thing by adding an extra FET cct, it seems to be just fine. Arnim

The easiest way is to use a beh

Thank you Helmut. I will contact FreeScale. There are several things I need to ask. Best wishes, Jim "Helmut Sennewald" <helmutsennewald@...> wrote:

I'm new to LTSpice and circuit simulation software. I'm working on a switcher 5Vin 18Vout @ 25mA. I need to add short-circuit protection to my circuit, and have a few ideas that I want to simulate.

Correct. Unit step; that is u(x)=0 if x<=0 and u(x)=1 if x>0 Well, it is a little bit dumb, because the answer is right there in the help file under b-source functions, but it seems you just

Hello, the loop gain probe from the LTspice example folder is very helpful to me. Wondering how it works, I found a lot of information from earlier posts in this group (Thanks to all contributors!). I