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.
This circuit appears at various points in this section from various sources and with variations. This one...
This circuit was found in Radio Electronics magazine from June 1963. The range is small and the...
The circuit shown in the figure consists of a low voltage drop (LDO) regulator for 200 mA using the...