Found in a 90s R-E Experimenter Handbook, this circuit has a greater gain than the previous one for presenting two stages. The integrated circuit used is uncommon today.
This circuit was obtained in an Electronic Design from the 80's. It has the adjustment of the gain...
Found in a 1965 Electronic Design the purpose of this circuit is to control the gain of a stage by...
This circuit has an interesting application. If a device with the selector switch in the 110 V...