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Buckboost feedback loop injection resistor position?

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T

treez

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Hello,
Do you believe that R7 is a good place for a feedback loop injection resistor, for measuring the feedback loop with a gain/phase analyser?

I believe that loop can be broken anywhere(?), as long as for voltage injection, the impedance looking to the "input" side of the injection resistor, is far lower impedance than the impedance seen looking to the "output" side of the injection resistor?
 

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