This well-designed bistable configuration is for educational purposes. We found it in the September 19873 Radio Electronics magazine. The transistors are types from that time.
This circuit was found in a 1968 documentation. The circuit generates three rectangular signals...
We found this circuit in an old documentation from the 70s. The circuit can use any varicap and...
Found in American documentation from the 90's, this circuit is very current and can be implemented with...