This circuit was obtained from a 1969 Electronic Design. Transistors admit modern equivalents. The frequency of the signals is set to R2.
The circuit in the figure is from a source with the possibility to adjust the output voltage from...
We found this circuit in an old magazine 73 of 1974. The circuit must be powered by a continuous voltage...
This circuit is from a 1987 American publication called Electronics Handbook. The circuit can be...