This circuit is from a 1968 Electronic Design. The characteristics of the output transformer are not given and the transistors are of the time. The circuit provides a power of a few watts.
This is a higher current version of the previous circuit, obtained in recent English...
This analog tachometer can be used in cars with platinum or in robotic and automation applications to...
Found in American documentation, this amplifier stage has unit gain and a high input impedance. It...