XTAL oscillator with fine tuning (CB22403E)

We found this circuit in an old English documentation. The integrated circuit is of a specific type of the time.

Resistance to voltage converter (CB9597E)
This circuit allows you to read resistors up to 20 M ohms, converting it into voltage. The circuit is...
Continuity Test (CB18281E)
The circuit in the figure is a useful continuity test serving to check the condition of circuits and...
Freezer Alarm (CB1281E)
This circuit beeps when the sensor is triggered by the opening of the freezer door or other...