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1. Oxford Dictionary

   positive feedback

   • n.
     the enhancing or amplification of an effect by its own influence on the process which gives rise to it.；the return of part of an output signal to the input, which is in phase with it, so that the amplifier gain is increased and often the output is distorted.

   • noun: positive feedback

2. • 更多解釋

   positive feedback

   • IPA[ˈpäzədiv]

   • n.
     the enhancement or amplification of an effect by its own influence on the process that gives ...

   Oxford American Dictionary