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.
This simple signal injector was found in a Radio Electronics from July 1959. The transistors are...
This circuit is from a 1976 documentation. The diodes can be 1N34 or equivalent, and the power...
Integrated LM108 and LM101A are used in this fast adder with low input current, figure. The...