In the figure we have the configuration of a voltage regulator with 3 transistors. The components depend on the desired voltage and current as well as on the characteristics of the transistors.
This old amplifier, with germanium transistors, was found in a Japanese technical magazine in...
This circuit uses an operational that is not currently common. We found it in an old American...
This circuit is from a 1978 publication, being connected to the contact breaker of cars that still...