Engineers use feedback loops — typically negative feedback is more useful, but positive feedback is needed for oscillators.
“The only way to discover the limits of the possible is to go beyond them into the impossible.” – Arthur C. Clarke Even worse: some of these laws go back decades with little to no effort to improve ...
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In operational amplifier stability, one rule of thumb is to allow 45 degrees of phase margin. Other design guidelines state that 60 degrees is best; still others say that 30 degrees is sufficient.
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