This circuit is from American documentation from 1970. It can be designed with a BC558 and for the operational, we can use equivalents. The FET can be the BF245.
With the use of a cascade transistor, the dynamic response of a phototransistor can be increased, as...
Adders appear several times on this site with operators of all types. In this circuit the output...
This setting appears elsewhere in this section with variation. We obtained it from a foreign...