This circuit was found in Philips documentation from 1967. The components are of the time, being transistors like BCY38 for TR1, BC108 for TR3, and others depending on currents.
In the figure we present an interesting application suggested by Microchip (www.microchip.com) in which the voltage...
This circuit was found in an English technical documentation from 1973. The circuit generates...
We found this circuit in a 1974 documentation. The NPN transistor can be the BD135 and the PNP the...