kiss said:
Boy, I like when I learn things.
Me too.
I'm working on the parallel RLC now. Using the same tutorial and the RLC values listed. I'm getting a fine resonance trace
View attachment 62860 but having trouble with phasor and other analyses.
Graham, don't be put off by what is, admittedly, some pretty esoteric ramblings here between KISS and myself.
This bears on the main topic of the "switcher" circuit that started this whole thread.
Remember the little inductor on the board you removed from the power plug you had?
It's part of a series RLC that allowed the circuit to oscillate (giving us the "AC" of the DC to
AC to DC).
It's one thing to create a
reliable oscillator using a 555 timer IC or some OpAmps but another thing altogether to do it with an RLC and some transistors.
The minutia you've seen discussed here is actually important to understanding just exactly how and why these circuits work.
But I will say that in the end, all I'll remember is how to determine the resonant frequency since that's what really counts when designing an oscillator.
Or even better yet, I'll remember exactly what question to ask Google to find the answer.
Very important to know what question(s) to ask.