This circuit, found in a 1958 magazine, is for reference only, since the components are not easy to find today. The transistors are germanium types and power supply is made by common cells.
The amplifier shown in the figure is from the manual of linear integrated circuits from Analog...
This circuit was found in a 1967 US publication. In it we have the implementation of a ring...
The circuit shown in the figure generates a rectangular signal whose frequency depends on C1. For...