This peak detector has a memory to prolong the response. The circuit is from American documentation from the 1980s. The supply does not have to be symmetrical.
August 2016 - It can be obtained from Mouser Electronics the new DC-DC PFM Step-Down XC9272 from...
This circuit was obtained from an 80's EDN. The components used are still common. The circuit can be...
An interesting interface solution that can be provided in some cases is the one shown in the...