Re: Oscillators in LTspice

On Sat, 19 Oct 2024 05:33:51 GMT, Jan Panteltje <alien@comet.invalid>
wrote:

On a sunny day (Fri, 18 Oct 2024 16:33:22 -0000 (UTC)) it happened Cursitor
Doom <cd999666@notformail.com> wrote in <veu2ki$3cmo3$1@dont-email.me>:
>

Gentlemen,
>
I've never spiced an oscillator AFAICR. Do they self-start in spice
simulators (LT in particular)? IOW, did Mike Engleheart build something
into the engine which generates wideband 'background' noise, particularly
at 'power up' as it were? I'm assuming there must be some such mechanism
and if there is, it must be present by default for all schematics one
attempts to simulate and not just oscillators?

>
Often, if not always, it is simpler to just solder a circuit together and measure it, than that ElTeaSpites jive.
Tried it, have it on a Linux PC, it did not give the right waveforms
lacking accurate models, and environment awareness. peeseebee, housing, cables, what not.
Used it for some LF filters as that saves math, but there are much simpler filter design programs
that do the same and better, just display the curves.
>
ElTeaSpites has become a religion...
Just use a soldering iron and a good scope, maybe also a spectrum analyzer and you have certainty.
I have done LF and GHz stuff that all works that way,
And you will need the right model for ElTeaSpites (always incomplete) and need to measure anyways.
ElTeaSpites sucks anyways when you add microcontrollers and those are everywhere,
You should be OK with all your boat anchors doing good measurements.
Modern stuff uses chips that give very limited info about what's in those,
you will need the right model for ElTeaSpites (those are always incomplete) and need to measure anyways.
Just test small sub-circuits and put it all together.
An alternative would perhaps be to as AI to design stuff.. save a lot of the time to get familiar with the ElTeaSpites.
>
Is that where it goes for electronics design? AI?

It's sometimes hard to understand your pun spelling meanings, maybe
because you are not a native English speaker. Foreigners who try to
pun in English are often ludicrous. I was at a giant gathering at a US
national lab and some French bigwig tried to pun in English. There
were about 2000 instances of dead silence. I almost felt sorry for
him.

LT Spice is wonderful. Ususlly I can go straight to a production PC
board from a good sim.