This circuit uses NOR ports to generate signals up to 10 MHz, depending on the crystal. The supply can be done with voltages from 5 to 15 V and the signal generated is rectangular.
This circuit shows how to simulate a high-performance diode with two diodes. The circuit is from a...
We find this circuit in an American 1980s documentation. The circuit can still be assembled...
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...