how to assess if the stabilty analysis is necessary

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chang830

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We know the feedabck or loop will always bring the stability concerns in design the cicruit. There even contains multiple loops in one block. It is difficult to play evry loop analysis for every loop in one circuit. I wonder if there are general guideline to have a quick assession on which conditions you need to do the loop analysis?

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Hi
I didn't read it but may be useful.

P. J. Hurst and S. H. Lewis, “Determination of Stability using return ratios in balanced fully differential feedback circuits,” IEEE Trans. Circuits Syst., vol. 42, pp. 805–817, Dec. 1995.

regards
 

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    chang830

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can u please upload this paper.
 

Hi

P. J. Hurst and S. H. Lewis, “Determination of Stability using return ratios in balanced fully differential feedback circuits,” IEEE Trans. Circuits Syst., vol. 42, pp. 805–817, Dec. 1995.

see:

regards
 

It is a very very enigmatic knowledge. You can learn automatic control and systems theory.
 

If there are multiple loops, in addition to above said paper's techniques, I would run a step response transient analysis treating the whole system as a black box. Based on the ringing at the output, damping factor, peaking etc can be determined. Hope this helps.
 

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