This trimmer or reaper amplifier cuts the signal peaks at a voltage determined by the zener diodes. The gain is given by R1 and R1 and the power supply must be symmetrical from 5 to 15 V.
The circuit shown in the figure is a more sensitive version of the previous one (CB16105E). Two...
Found in an EEE this circuit uses FETs of the time and a bipolar one. Current equivalent...
The recommended distance between the emitter and the phototransistor is 10 mm for this...