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boB, The standard SPICE diode model uses Tt to model reverse recovery, and thereby, stored charge. The diode capacitance will also have some effect on the dynamic reverse current. This model is

Sorry to beat a dead horse (I like horses), but did anybody ever figure out if LTspice can actually simulate reverse diode recovery properly or not ??? I see Helmut's postings too, (msg_43634), but

Leo, This file should fix your transformer windings and circuit stability over the 18 V to 30V range. I did not address the ZVS issues but looks like a piece of cake. If you need more help just ask.

Hi Macy, Personally I use version control systems for all my code, so I never have any doubt as to what is going on. Cheers, Dave

Andy, Thanks I was just going to try using the + at the start of shorter lines. Actually, the humongous long line is easier to cope with than I thought. Now that David pointed out I can ctrl, right

David, YES! ctrl, right click works! didn't know about that ability. [Mike, thanks for anticipating] Problem with the versions of multiple files, is that by necessity they all have the same name!

There are probably dozens of ways to do this in LTspice. Here is one way that uses just one device (a V-I table I-source): I1 0 1 TBL(-5 0 {1u-5} 1 0 1) ; 5V 1A PSU with 1uV of droop R1 0 1

Hi. Look: http://tech.groups.yahoo.com/group/LTspice/files/%20Examples/Apps/Ideal_voltage_source_current-limit.zip Ideal voltage source current-limit. Series resistance=0. The model is made for

Hi, I've been playing with the current source element with the 'active load' box checked. I place this in series with a voltage source and a resistive load (e.g. to model a PSU with current limit) and

Jeff, Well, 2 diodes connected anode to anode and cathode to cathode would a parallel connection. Anti-parallel is 2 diodes connected anode to cathode in parallel.The additional diode results in the

Long long ago and far far away, I designed varactor triplers for 100 watt transmitters to go from 150 MHz to 450 MHz. Even in the day I had some kind of model for the varactor for the pre-SPICE

I'm trying to design a 240MHz to 720MHz tripler circuit and wonder if anyone has an example circuit I could follow. The goal is to use anti-parallel PIN diodes, so an example using PIN diodes would be

You also need to realize that an .AC analysis is a small-signal linearized analysis. The multiplier, which is an inherently nonlinear device, is presumably linearized at the operating point, and

FYI ... after running an AC analysis, if you hover the mouse pointer over any net, look in the lower left corner where LTspice will tell you the DC operating point voltage on that net. Andy

Maren (distheo@...) wrote: a) Why is the .ac simulation influenced at all by the parameters of the In an .ac analysis, LTspice first needs to find the operating point. All voltage and current

The idea I will give you is to open Help in LTspice; Then go to LTspice > Circuit Elements > B. Arbitrary Behavioral Voltage or Current Sources. Scroll down and find the first table of functions. Andy

Macy wrote: I like the idea of 'including' the file with everything in it then I can Well, you've got a choice. You can either (1) keep everything on the schematic, or (2) move stuff off the schematic

Look up the behavioral B source function, absdelay( x, t [, tnax] ) in the LTspice Help File. Howard

Hi Macy, If the SPICE directive is something like .step or .param, you can just right click. If the SPICE directive is something that the simulation GUI normally deals with, then the GUI pops up,

now there are 'comments' on the schematic .ac dec 500 10 100k .noise V(out) Vsource dec 500 10 100k .ac LIST this goes forevers..... .noise V(out) Vsource LIST ditto..... [Thanks for suggesting LIST.