We found this circuit in a 1969 General Electric documentation. The circuit uses transistors of the time and the diodes in the dotted board must be mounted on the output transistor heatsinks.
This circuit was obtained in a 1970 EEE and applies to almost any operational amplifier. The...
This circuit was found on an 80's Ham Radio. The transistor admits equivalent. The circuit can...
This circuit shows how to implement a TTL compatible oscillator using a transistor. The circuit is...