Evaluating my CLM-s Transistor-/Component- Level models for LM321/358/324

Update : The predecessors of the  below - the internals of the LM324 equivalent circuits are irrelevant - the purpose here is to provide a multitude of random ways to make the models to show up their weak spots

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®-lly oriented for +5(±2.5)V Vs (!Only) - now up to ±15V "verification"

TEST.1

TEST.2

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Update.2 ::

TEST.3

TEST.4

Note : the Test.4 is slow ramping , pos.-feedback oscillator -- usually the very fast or very slow ramps do trigger instabilities in the voltage comparators and in some op amp.-s (notice , that the previous tests didn't reveal any serious "bugs" /!\) . . . here we got 3 failed (unstable) , 3 - poor (it's "unexpectedly") , 1 strange (a macro-) model ... and 1 decent simulation model (!!! but not an exact functional analog of the LM321)

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Links : 

https://zeptobars.com/en/read/TI-LM358-dual-general-purpose-opamp 

https://zeptobars.com/en/read/Ti-LM324A-LM324-quad-opamp 

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[Eop]

The sensitivity test of some ideal diode circuits

... using the transistor model of the LM324 ... apx. down to 10% error

 

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[Eop]

Revised my LM321/358/324 transitor models

The best variant turned out to be (v.I) :

This v. is couple of times faster and with higher DC voltage gain than the actual LM324 , uses a different biasing circuitry and modified output stage . . . as it turned out it is difficult to get the ® d/s provided equivalent circuit to have the stability otherwise

. . . the 100Ω resistors seemed to improve the common mode rejection at the time they were added . . . however there has been modifications since -- at the moment there's no time to validate the effect for the final v. . . .

 some tests :

. . . compared to the second best variant (v.JI) and to the macro-model of the Op Amp in question . . .

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 [Eop]

Wide frequency range - narrow bandwidth LM324 oscillator

Reviewed an old concept - came out wit a new one . . .

in the follofing the timescale shows the actual time . . .

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[Eop]

ADC related Op.-Amp. Experiment

~about

↑↑ _ the best result here however would be Frequency × Slew Rate _ ↑↑

(( required to Drive 74HC14 's INP , AND/OR that relative to a V_REF . . . basically to make power-buffer's input more sensitive & a higher impedance one))

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[Eop]

Old Op Amp test PPM dcVC check

5V operation of LM358

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pulse position modulated direct current switching voltage converter QC

! likely source® http://www.24vpower.com/dianlutu/89.html

converting it to 20V to 5V variant

. . . adjusting switch turnoff time ... down to about ~ 100ns

no further checks (e.g. output short circuit , load steps , starting at mild overload ... )

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[Eop]

some OP-Amp based regulator check ups

Minimal

Improved -- It seems the LT1086-12 model sets up a little "Show"here . . .

No concert v. -- although it simulates fine /!\ there'll be a point of concern selecting the proper xx78Lxx as the one i got was "factory tuned" to something 12.4V ((+3.3% systematical ? = no problem - the datasheet specifies ±(5% systematic ±0.75% line- (±0.417% load regulation)) =/!\ 12±0.74V )) . . . while the above grid shows some 9±0.00003V load regulation (which in practice should be expected at least 10x worse OR ±0.0033% load regulation) . . . blah, blah

Dual Op.Amp v.