Re: Sine modulated PWM voltage source (PWL file=xxx)
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Mathias, The error message clearly led me to the correct guess of the problem, time sequence out of order or unrealizable (zero or negative time step).??
Christoph, I've never used a text file to generate a PWM signal.? I suppose it'd be handy to generate a random bit, or send in a bit of audio or a modulating waveform.? For a simpler PWM signal, I'd suggest using a PULSE source (V or I), and building the first period of the waveform in the setup, and then entering a value for the Period, which will cause the waveform to repeat indefinitely if all is set up right.? An example statement:
PULSE (0 {Clock_Vhi} 0 100n 100n 2.5u 5u)
generates a 200kHz clock with 50% duty cycle, Vlo=0, Vhi=(Passed in parameter, defined by statement .param Clock_Vhi = 3.3), 100ns rise & fall times, 2.5microsecond time at Vhi, 5microsecond period. The LT Spice XVII help documentation covers this well.? ? I'm still getting used to the new key bindings and help system in LT Spice 24 (keep learning, or get run over!). -Rick, WA2YMS (an occasional contributor)
On Friday, April 25, 2025 at 07:48:14 AM EDT, Andy I via groups.io <ai.egrps+io@...> wrote:
On Fri, Apr 25, 2025 at 06:07 AM, Christoph wrote:
Forgot the mechanism how uploads work here. Is the group notified automatically when an upload occurs?
No, not necessarily.? There is a checkbox when you upload, which sends an auto-generated message, which most everyone ignores, and it self-destructs in a few days.? We ask that you always compose and send a real message here, in your message thread, not the auto-generated one, telling us what you uploaded (and why, if it's not obvious).
?
Andy
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