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.
This 100 kHz crystal controlled oscillator was found in an American 1980s documentation. The...
Only two transistors are used in this preamp for low-sensitive transducers, such as guitar and...
Found in Popular Electronics this circuit uses current components to control a pump in order to...