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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: What is unity gain in op amp? posted by Bom on May 5, 2002 at 12:58:15:
In simple terms:Unity gain op amps are compensated so they are stable even with the output directly wrapped around to the negative input in a non-inverting voltage follower mode or with Rf=Rin in an inverting configuration. These configurations have a gain of ONE or unity.
Op amps that are not compensated for unity gain will be unstable in the unity gain follower mode or the inverting configuration where Rf=Rin.
If an op amp states that it is stable for Av>=5 for example, Rf must be selected to be >= 5*Rin for it to operate in a stable manner.
G.
Crank it up...
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Follow Ups
- Re: What is unity gain in op amp? - Gepetto 14:47:04 05/05/02 (3)
- in op amp math: -1 = +2 - jcox 22:50:08 05/06/02 (2)
- Re: in op amp math: -1 = +2 - Bom 07:17:32 05/07/02 (1)
- unity-gain stable op amp "safer" as drop in, but... - jcox 08:11:10 05/07/02 (0)
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