On Sat, 26 Oct 2002, Eric Smith wrote:
  Ross Archer <archer(a)topnow.com> wrote:
  Two half-wave circuits with diodes conducting in
opposite
 cycles has to be the cheapest way to get bipolar supplies. 
 Unless you have AC with a center tap, how is "two half-wave
 circuites with diodes conducting in opposite cycles" different
 than one full-wave rectifier?  Maybe I don't understand how
 your suggesting it would be wired?  Perhaps some ASCII art
 would help.  (Doesn't have to be fancy.)
 Thanks,
 Eric
 
lead 1 of transformer is ground,
lead 2 of tranformer goes to anode of diode A and cathode of diode B
+ 1/2 wave power comes from cathode of diode A
- 1/2 wave power comes from anode of diode B
The diodes conduct on opposite cycles (like a full wave centertap supply) but
in this case one diode generates the + supply and the other generates the -
supply...
Peter Wallace