SV: Re: [sdiy] LM723 synth power supply issues!

[karl dalen]

--- Ken Stone <sasami at hotkey.net.au> skrev:

> >If you have a ring power transformator with 2 separate secondary
> >windings and you want let's say 4 independent and different
> >regulated voltages, is it possible to connect 2 diode bridges
> >on each winding (and its associated ripple filtering and LM723
> >regulator) and then connect 2 of the floating regulators as a
> >bipolar unit e.g +/- 15V and GND and still having the other two
> >floating? 
> 
> In a word, no. IF you want them entirely independant (i.e. without common
> references, you would need to isolate at least one bridge per side with
> capacitors.

I ment bridge with bypass and regulator, is it then possible?
How come? Are the other two supplies both positive or negative
or bipolar? Whats their reference?

> If you want each pair to share a voltage rail, you only need a single bridge
> per side.

I dont understand, you are saying that you can make a bipolar supply with two
LM723 and one bridge and no center tapped
winding? How do you do that?

KD
 
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