Once the simulation is working, you can replace them with accurate models one at a time, if you wish. Also keep in mind that the error message will often misidentify the issue. I've had many occasions where I saw the same timestep error, and referred to some node inside a macromodel,...
I'm working on an audio power amplifier. I recreated the schematic from the internet in LTSpice and now I'm getting error: "Analysis: Time step too small; time=1e-006;timestep=1.25e-019;trouble with bzx84c15l-instance d1". This is the first time I'm using this program and I hav...
Time step too small; initial timepoint: trouble with node "u1:21"add the UIC option to skip finding the initial operating point, and you get: Code:[Select] Time step too small; initial timepoint: trouble with node "u1:30"which IMHO indicates something iffy about either the model's circu...
Yes, you can visualize the PWM signal in LTSpice by running a transient analysis and then using the waveform viewer to observe the output. You can plot the voltage at the node where the PWM signal is applied to see how the duty cycle changes over time. ...
It's LTspice nebulous way of indicating that it's having trouble simulating the circuit. The message usually doesn't point to anything specific except a point in time. Check the circuit structure. Check that values are reasonable, etc. Check node voltages and currents. You can try looking at...
I'm puzzled about node 2: why does it say it's "floating"? Because it's got a capacitor connected to the input of a DC device? When I plot the voltage I get a flat line at 12 volts; shouldn't I see an exponentially-decaying voltage through C1? Color me confused. Attachments vc...
Notice how the emitter voltage is untidy. Because it is attached to a node we can't physically move it or rotate it with the hand symbols etc... well we can but it won't do as you want. So what we do is add a spur to the point of interest and attach the voltage to that....