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Marcel wrote: "I uploaded differimproved.zip in /temp." You forgot to include the models for the output transistors, QBD139 and QBD140. It's generally not a good idea to refer to unnamed nodes (N007

Can you upload a picture of the circuit so we can see what the layout parasitics should be like? I've looked at BJT modeling a lot, and I can say it is very difficult to even get enough measurements

Is it possible to scale a trace by a parameter defined on the schematic? Like: .param maxvolts=122, and then plot V(c1)/maxvolts . Such a thing works when adding the parameter statement to the plotdef

I uploaded differimproved.zip in /temp. It is a simulation of a simple audio amplifier. Somewhat to my surprise my modifications didn't lead to the expected decrease in THD. Checks with another

The Miller cap is not added to stop the oscillation, but to slow the switching edges. You can see the edge slow-down effect in the uploaded file (Files/Temp folder). The simulation has a pair of the

Hello Waynel, please have a look to these Application Notes: In : http://www.fairchildsemi.com/apnotes/ (a very interesting collection) ->Discretes ->FETs (97) ->Mosfets (86) ->AN-7532 A New PSPICE

Yahoo is being its normal self - as usual!!! I signed up for LTspice posts, but users of other groups that didn't are now complaining about an inbox full of LTspice messages. Yahoo needs a web

Yahoo's gone mental. Other groups are affected to. //Dan, M0DFI "Vlad imbvlad@... [LTspice]" <LTspice@...> wrote:

Same for me. I see some note while waiting about "waiting for proxy." --s.a.hill (new to group) LTspice@...> wrote:

Hello I keep getting errors whenever I try to access the web page of the Group, no matter if it's the files or the conversations, but I seem to be able to post replies from within GMail. Is this a

On a second thought, the "sw" only might do (it has "vt" and "vh"), but if an additional delay is needed (to avoid "time step too small: errors), the comparator will come in handy. Vlad

Lohith, could you send a copy of li-ion files: vukan@... Thx Woody <LTspice@...> wrote:

I don't really understand your purpose but, given what you have said: you could make use of a comparator (use the Schmitt A-device with "vt=50m vh=0") and a VCVS (element "sw") with proper Ron/Roff.

Lohith, The circuit I uploaded contains a Battery model that can be used to simulate a Li-Ion battery. Tim

In case you are looking in the wrong place ... Download and open the "Table of Contents" file and search it for H11L1. Click on the link, it will open the directory in your web browser, from which you

Well, suppose you have a gain 2 non-inverting setup. Vin+ > Vdd/2 means the op-amp cannot actually make the summing node Vin- anything like Vin+. So Vdd=5, Vin+=5, Vin- = B.rail = 2.5: error is +2.5 -

John Perkins wrote: "Does anyone know where I can get a model for the H11L1 optocoupler?" There is one in this group, in the Files section. "There where some messages about this part a few years ago

I need Li-ion battery model that can be simulated in lt-spice (4.2v) rather than charging ckt...If any1 had it..plz post it to me Thanking u

I really have to bite my tongue here over Carl's poor aim at uploading files. LTspice should be able to reproduce the transitory MOSFET oscillation just fine as long as the circuit model is reasonably

Hi Tim, Thanks for the zip, but I can't find symbols "Potentiometer2". Richard