This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old documentation and for the components used the frequency is 500 kHz.
This circuit with an unusual configuration was found in the January 1974 issue of Radio...
The figure shows the basic circuit of a temperature sensor with the AD592 thermometric IC. This...
While BC547 is not a suitable transistor, it can work on this circuit. The ideal would be the...