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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: offset voltage, common mode distortion 627 vs. 637, output load posted by capslock on February 1, 2002 at 13:43:58:
Hi,> any FET input op amp will have problems when used in non-inverting
> mode due to common-mode-input-voltage-dependend input transistor
> capacity causing distortionI would re-phrase this tro include ALL Op-Amps with "long tailed pair" type inputs, be they discrete, monolithic, Fet or BJT input. All suffer from various common mode induced problems, though FET OPA's do less so then BJT ones.
Only OPA's build on the current feedback complementray technology (AD811, LM6181/82/71/72 and other similar ones) which operates without the long tailed pair input is free from those effects.
Later T
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Follow Ups
- Re: offset voltage, common mode distortion 627 vs. 637, output load - Thorsten 02:05:56 02/02/02 (3)
- Re: offset voltage, common mode distortion 627 vs. 637, output load - Elso Kwak 08:14:55 02/02/02 (2)
- Re: offset voltage, common mode distortion 627 vs. 637, output load - Thorsten 11:42:24 02/02/02 (1)
- Re: ???????????????????????(NT) - Elso Kwak 13:33:34 02/02/02 (0)
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