We found this circuit in the October 1994 issue of Electronics Now magazine. The circuit uses a now-uncommon 4046 PLL and the gates of a CMOS 4001.
May 2017 - Mouser Electronics is already in stock with the new BCP1395 transistors from Nexperia....
Figure bellow shows how the 4088 or 4018 can be used as a touch switch. Two metal plates separated by 1 mm...
This conventional configuration for TL series amplifiers is from Motorola's 1993 Linear Interface ICs....