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On 17/03/2025 12:27, Tony Casey wrote: > On 17/03/2025 11:40, Stephano via groups.io wrote: >> using the TI model of LF356 on LTspice v24.1.0 result in strange behaviour, DC output from OpAmp is over

I don't have version 24.1.0 installed, but with 24.1.5, the (Helmut's) original circuit stalled at 40% completion, but was correct up to that point. When I changed the rise and fall times of the

We can't help much unless you let us see more of what you are doing. Upload your .ASC file AND all the other files required to run the simulation, but not .RAW? and .LOG files or pictures,? in a ZIP

Hi, using the TI model of LF356 on LTspice v24.1.0 result in strange behaviour, DC output from OpAmp is over 18V when the supply voltages are +/- 15V. In the "Component attribute editor" I've changed

That's a bit too much freedom. LTspice will not warn you of duplicate designators until you run an analysis, which will obviously fail. If you leave it entirely to LTspice you will never get

I don't know, in my domain what I can do the best is to spend the tiny time step = 1ps. (already the smallest when considering the computing performance.) But neither LTspice nor Matlab/simulink has

The transfer function and time domain expressions look OK to me but the scope plot is obviously "wrong". This could be caused by the sample-based Simulink implementation. What is the sample-rate /

That's exactly true. YIG are tuned by varying the magnetic field the element is in, hence the coils. This also defines the dynamic behaviour. -- Regards, Tony

In simple words, ... The user's fault or math's fault ? Beg your pardon first, so noisy, definitely my fault. In fact, my default thoughts is 99% belong to user's fault, but I don't know what's wrong.

Hi, : You know what ? I'm surprised about I do have the memory about using this in Matlab. It got the same result. I worship the math as some kind of religion, but this time, I can't get the desired

aside: please note that for time-varying resistors, the theoretical circuit equations will change and new derivative terms for (otherwise fixed) component parameters will enter into your equations.

Hi I have LTspice XVII installed in the directory: C:Program files\LTC\LTspice XVII Is it safe to install LTspice 24? so that I keep my old Auto_Genrated models? Can you please advise? is the new

This implies that both inputs might respond to current, unless the TUNE coil has enough resistance which is stable and predictable. Andy

john23, I uploaded "YIG VCO.asc" to the "Temp" directory.? It models what you apparently wanted.? It has two inputs and one output. The "Coarse" input is for your "TUNE" signal that sets the center

Just to note, in the latest LTspice 24.1.5, it will have the following message... It seems 'SCOPEDATA=' is forced to replace the 'file='. Looks like, compatible issue between newer & older...was used

Did anything happen?? Was there a pop-up window asking you to confirm? If no pop-up window, then perhaps you were not using Windows, or another program intercepted that key combination, or you had

Right-click on the number, such as R1. An editing pane opens where you can change it to anything you like, within reason. -- This email has been checked for viruses by AVG antivirus software.

Sorry for FAQ. How can I renumber the parts number? I heard "shift+ctrl+alt+R" is available. But no change appear. Hidehiko JA9MAT.

Depending on what john23 is wanting to model, it might be necessary to actually model the TUNE and FM circuits. They are both connected to coils internally, so the inductances might need to be

Two ports, really?? I count three. Add the Tune and FM inputs, to produce a single frequency-controlling voltage.? You have many ways to add signals, including a B-source.? You need to decide on