This Peak Detector circuit is very famous.
It can be seen in the Half Bridge Rectifier, Boost Converter, Flyback Converter, Villard Cascade, and many other circuits.
This circuit takes the peak value of an AC signal and converts it into a positive or negative DC value depending on the direction of the diode. Simply put, it will give you the max or min DC value of an alternating signal. Some refer to this circuit as a Half Wave Rectifier.
Best,
Tehrangeles ⚡
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