We found this circuit in the November 1992 issue of Radio Electronics magazine. The circuit has two integrated circuits, one of which is a preamplifier stage. The power supply must be dual.
April 2017 - Mouser Electronics is delivering the new Osram DURIS E 2835 LEDs for lighting,...
We find this circuit in an 80's EDN. The circuit can be used with equivalent operational,...
The output voltage of this circuit is proportional to the square root of the input voltage....