i'm looking at the definition for active device
"active device: A device that requires a source of energy for its operation and has an output that is a function of present and past input signals. Note: Examples of active devices include controlled power supplies, transistors, LEDs, amplifiers, and transmitters."
what active device has a power source but its output is not a function of its input signals? Also. An LED doesn't even have input signals does it???!!! I can't see why it fits into that definition of active device.