This circuit was suggested by National Semiconductor in one of its manuals. The LM108 integrated circuit, uncommon nowadays, can be replaced by an equivalent. The power supply must be symmetrical.
Found in documentation from the 70s, this circuit uses an operational one from that time. It goes for...
This circuit is from an old American publication. It divides a 40 to 60 MHz TTL signal by integer...
This 2004 circuit is based on the ionization effect that occurs in old incandescent lamps with...