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Stabilizing a distributed amplifier

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DJ

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distributed amplifier site:edaboard.com

Any idea beside looking at B>1 for the whole amp?
 

You could do a first approximation by calculating or simulating the load and source impedances facing a single stage assuming that the other stages are not active (just their impedances are loading the transmission lines.) See if these impedances will cause a single stage to oscillate.
 

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