Regenerative receiver (CB20513E)

We found this receiver in old documentation. The transistor is made of germanium and the headphones must be of high impedance.

Gain 100 Operational Amplifier 741 (MSB018E)
The gain of the Operational Amplifier in the figure is given by the ratio between R1 and R2. In...
Temperature Sensor I (CB5050E)
Taking advantage of the comparator setting, we can use the Norton amplifier as an over temperature...
Analog-to-Digital Converter – 555 (NI024E)
This circuit converts a resistance in the range between 1 k ohm and 1 MΩ to a signal in a...