Weekend small topic

cruelfox

Weekend small topic [Copy link]

First of all, this is an advanced circuit knowledge question, not a brain teaser.

For small signals in the frequency range of 100Hz--100kHz, what basic component does the op amp correspond to?

topwon

When the current is less than the op amp output threshold, it short-circuits to ground. When the current reaches the threshold, it stops increasing, which is equivalent to an increase in the resistance from the component to ground. Is this the function of a PTC resettable fuse?