Found in the 1974 Ferranti transistor manual, this Schmitt trigger circuit uses general-purpose transistors of the time.
Crystals from 100 kHz to 1 MHz can be used in this 1957 Raytheon circuit. 4 can have values...
This low power TTL circuit (Low Power Schottky) can generate rectangular signals on a 10 MHz...
This circuit was suggested by Analog Devices in a 1990s documentation. The components are from the...