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 for triggering a CMOS gate without rebounding was found in the October 1974 issue of...
This generator is more complete than the previous one, being able to generate pulses as indicated...
This 1975 circuit for automotive applications replaces the mechanical vibrator found in old cars...