"dave"

A diode is not an active device.


** Most sources say it is classed as one.

Then explain the Gunn Diode. DC in, RF out. How about LEDs? DC in,
Photons out.


http://www.allaboutcircuits.com/vol_3/chpt_1/2.html


** And Wiki says otherwise:

http://en.wikipedia.org/wiki/Electronic_component


Semiconductors and vacuum tubes are automatically "active devices".

So that includes solid state and vacuum diodes too.



..... Phil