"SMJ" wrote in message
ups.com...
Anyone know where I can see a schematic of a common emitter power
supply? I've always read about using the emitter of a pass transistor
as the positive terminal output (Common collector). Taking apart this
trip lite power supply I see that they have the negative terminal
connecting to the collector of the npn pass transistors. This seems
like it would extremely complicate the regulation design. Can anyone
explain the benefits, and where I can learn more about this design
technique?


It sounds like a standard constant current supply circuit - the collector
current is fairly constant with a varying load if the base is held at a
fixed voltage.

Leon
--
Leon Heller, G1HSM
http://www.geocities.com/leon_heller