This circuit was obtained in an Electronic Design from the 80's. It has the adjustment of the gain through a simple potentiometer. The power supply must be symmetrical.
We found this basic oscillator configuration with two operational in Motorola's 1978...
We found this circuit in a 1983 English magazine, but it can be easily assembled today, as all...
This circuit was obtained in a General Electric documentation from the 80's, and can be used as a...