need lm324 ltspice schematic

[elli]

hi all
does anyone have the lm324 schematic in ltspice or orcad !
i wanna design the high gain opamp working with +-5 power supply , but i dont have much time . im looknig for some prior schematic that i can make some improvment on it to get mine.

thanks

 

[Audioguru]

The LM324 is very old and since it uses low power its output produces crossover distortion. Its low power causes its output slew rate to be very low so it has trouble with frequencies above only 2kHz at high output levels.
There are many more modern opamps available without these problems that can work with a supply of only plus and minus 5V or less.

 

[dick_freebird]

Old National databooks certainly have detailed schematics you
could capture for yourself. But the problem likely is in finding
the models (and in figuring out how some of the funky bias
current splitting they were so fond of, really works - stuff like
splitting an annular lateral PNP into multiple collectors, how
to know their ratio and how to model that weirdness).

I would bet also that you can find PSpice models of varying
detail, method and accuracy which could be, if not schematic,
at least subcircuit-call instantiated in your simulations.

Those same databooks (online datasheets may have been
scrubbed of useful detail, in the decades since engineers
called the shots) have numerous other op amps which are
higher speed, quite a topological variety to be found. But
you still have the trouble with models and values, all on you.