Found in a 1980s telecommunications documentation, the circuit presented acts as a product detector. The modulator or mixer in the square may be that of the previous circuit.
Using this circuit a low current switch can be used in the control of heavy duty loads, powered...
This circuit can handle 25 A unde a 32 V voltage using a hight power old transistor. This...
This circuit is suitable for applications such as a TTL log digital link. Maximum frequency is...