This configuration appears at several points in this section, obtained from different sources. This is from American documentation. The gain is 20 and the transistor can be a BC549.
Found in documentation from the 1990s, this circuit converts 12 V to 9 V from a car's power...
We found this circuit in a 1969 General Electric documentation. The circuit uses transistors of the...
This voltage doubler is indicated for applications where a voltage equal to twice that applied at the...