We found this circuit in a 1977 factory documentation. The operational amplifiers can be 741 and the symmetrical power supply. Capacitors can be changed for operation at other frequencies.
This circuit was indicated in an old American publication to serve as a Laser alarm system as a...
This configuration, found in other circuits on this site, was obtained in an English publication from...
Using an operational amplifier with FET, this circuit from a 1977 publication can generate...