This circuit uses three inverters to generate a rectangular signal whose frequency depends on R1 and C1. The circuit is from a March 1996 Electronics Now.
This circuit was found in the 1990 Motorola Dataar Linear. We can mount it with more modern...
This mixer was found in Silicon Chip documentation from the 90's. The circuit uses integrated...
This capacitance or approximation relay was found in an ancient American documentation. The SCR...