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.
This is a high gain circuit with 3 transistors connected in direct coupling. The circuit is from a...
We found this circuit in an Elettronica Pratica magazine [1977]. The edition is number 9 and the...
This circuit is from a 1950 documentation, being one of the first to use the then discovered...