This setting applies to virtually any photo transistor and any operational amplifier. The power supply must be symmetrical, and the gain is determined by the relationship between R2 and R1.
We found this configuration in the ON Semiconductor thyristor manual. The triacs depend on the...
This circuit was found in an old documentation. It converts DC voltages and its maximum current...
This circuit makes use of comparators and common operational amplifiers, having been found in...