This 12 V x 2 A regulator was found in 1965 Delco Radio documentation. The circuit uses transistors from that time. The input voltage can vary by 15% around the indicated value.
In the figure we have the way to use the comparator LM339 and others of the same series with the...
The presented circuit makes use of a operational transconductance amplifier (OTA). We found this...
We found this circuit in a Mullard manual from 1960. The transistor is a phototransistor of the...