We found this circuit in the Linear Applications Handbook of the 1994 National Semiconductor. The transistor must be a high voltage type and the LM3900 power supply must be symmetrical.
Found in an American publication, this circuit applies to almost any operational amplifier. The power...
This circuit was found in a 1980s instrumentation publication and can be applied to virtually any...
Found in an American 80's documentation, this circuit can use common FETs like the BF245 and cover...