News for hackers. Stuff that matters.

A comment on Alaska’s thawing soils are now pouring carbon dioxide into the air. Parent comment

Re:Alaska’s thawing soils are now pouring carbon dioxide int... by B1FF_PSUVM on Wednesday August 23, 2017 @03:26PM (#15084338)
> Feedback loops are notoriously hard to mitigate.

"Amplifiers that oscillate and oscillators that won't are the two great fears of analog designers."

[ Parent | on HN ]
Re:Alaska’s thawing soils are now pouring carbon dioxide int... by jacquesm on Wednesday August 23, 2017 @06:28PM (#15085747)
So you work hard to keep that feedback gain under '1' in an amplifier and over '1' in an oscillator.

Technically an amplifier with a feedback mechanism can become an oscillator and if you break the feedback loop in an oscillator you end up with 'just' an amplifier.

To make this even more interesting: a negative feedback element in an amplifier will greatly enhance the frequency response at the expense of amplification (and will vastly reduce the chances of that amplifier turning into an oscillator).

[ Parent | on HN ]