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.
May 2017 - Mouser Electronics announces the availability of new Toshiba SSM6K N Channel MOSFETs...
Using integrated circuits from the time, we found this audio compressor in an English publication from...
The 2009 project is based on the integrated circuit9 LM317T, an adjustable regulator with 3...