Found in a 1964 Electronic Design, this circuit must use transistors according to the supplied currents.
Based on the Linear Technology LTC2054, this -48 V circuit was found in a 2005 manual. The circuit is...
This circuit was found in an American 80's documentation. The operational may be a modern type...
This circuit was found in a Poptronics of the 90's. It can be powered by voltages between 6 and 15...