More ver.α tests

while designing a custom op amp-s , i have noticed there are 2 voltage levels , above what the op amp-s start to show up a better behavior -- namely 6.8V and 9.6V total supply e.g. ±3.4V and ±4.8V below that the things much depend on input signal level and the dc offset . . .

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this one gets it's gain up from above ±5.5V , ???

. . .

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[Eop]