Reader Comments
Nice! Low parts count, good design for it's intended purpose. I, too, would like the PDF better if the schematic did not have a black background.
To anonymous: the centertap of the secondary is only a local ground. The circuit provides positive and negative supply for OpAmps, as the article states.
It also states it is meant for micropower OpAmps.
I fully expect to come back here in a month and see a bunch of demands for 1000W 5KV inverters. ;')
Steve Greenfield -November 10, 2005 (Article Rating:  )
Nice design, but I think there should be no ground symbol at the center tap of the secondary winding.
If unbalanced currents flow from +V and -V to the centertap, the heavier loaded rail will sag, because the primary side currents to Vcc and primary ground get imbalaced too, and the voltage at the C1/C2 junction drifts to one of the rails, too.
However, if the center tap is not significantly loaded, then I think the design would work just fine.
Anonymous -October 21, 2005 (Article Rating:  )
Good design BUT why did you print the background of the schematic BLACK ?
Anonymous -September 01, 2005 (Article Rating:  )
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