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About Avoiding Op-Amp Instability Problems In Single-Supply Applications

Question asked by renanlopes on Jun 19, 2017
Latest reply on Jun 23, 2017 by renanlopes

Hello everyone! In the "Avoiding Op-Amp Instability Problems In Single-Supply Applications
by Charles Kitchin" article, there is a recommendation that the feedback resistor be equal to the equivalent resistor in the biasing voltage divider (R2 = 1/2 Ra, in the case of the decoupled single-supply inverting amplifier circuit, figure 3 of the article). But if a variable gain is desired by changing the value of the feedback resistor - in this case R2 - which is better for the opamp: is the "R2 = 1/2 Ra" condition reached at the minimum amplification gain or at the maximum amplification gain?

 

Avoiding Op-Amp Instability Problems In Single-Supply Applications | Analog Devices 

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