Op Amp dif. CM inp. imp.

 The differential and common mode input impedance of the op amp transistor models ...

 

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The circuits for determining the AvOL (open loop gain) of the op amp

´ 741 ::

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LM324 equivalent transistor model ::

Av ≈ 1.42·10⁶

Av ≈ 1.43·10⁶

Av ≈ 1.48·10⁶

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Poor Models of some Old Soviet Op-Amps + µA741

 

Name The closest analog К157УД2 2x LM301 К174УН4Б none К548УН1А LM381 co К553УД2 LM301 К554СА3 LM311 КР1407УД2 (LM4250) КР140УД1208 µA776C MC1776 КР140УД1408А LM308 КР140УД7 µA741 КР140УД8А µA740 (MC1556) КР538УН2 none КР538УН3А (LM387N co)

Name ss VSMIN ss VSMAX ss IS ss VIO ss IIO ss IIB ss RIDIF ss GBW ss SR ss

about ::

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Some tests :: Zipped Source

 

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Some more tests ::

 

PS ! the last figure specifies the INP voltage range ( ! not the the one of the OUTP ! )

. . .

an improved ver. of the above ::

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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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