This circuit was found in Linear Technology documentation from the 90's. The circuit uses components from that time, and can be powered by 5 V. In these conditions, it can function as a shield.
This circuit was found in Philips documentation from 1967. The phototransistor is from that time,...
This circuit can provide constant currents adjustable between 1 and 10 mA. The transistors can be...
We found this circuit in the semiconductor ON manual using couplers of the time. These components...