Found in an English publication from the 1980s, this circuit can be built with equivalent transistors such as the BC549. The signal must be applied to an external amplifier.
This circuit for Laser Diode power was found in a 2005 Linear Technology manual. In the diagram...
This operational amplifier circuit with power output using complementary transistors was found in a...
This circuit uses germanium transistors and has a push-pull output with transformers. The circuit is...