This circuit was found in Maxim's documentation from the 90's. The configuration uses components from the time but can be adapted to use modern equivalents.
This circuit was found in a 1977 documentation. It limits the voltage from a source using zener...
This simple radio uses few components due the direct coupling of the transistors. Coil is formed...
In the figure we have the way to implement an Exclusive OR or XOR gate with CMOS or TTL...