Yeap, it should be a very low power power supply. Vx is not important
Vcc and Vss are.
Vin can be anything from 15Khz to 28Khz so a transformer is not the
most desired option.
I have designed two SMPS for Vcc and Vss but there load to the
rectifier are not the same, with the described result.
I will try the options suggested in this list today.
Robert.
On 17/06/11 04:13, gene glick wrote:
On 06/16/2011 02:30 PM, myken wrote:
Hello all,
I would appreciate some expert advice.
Are you trying to make a low current power supply?
I agree with DJ - the unequal loading on + and - cycle will average
to something other than zero (unequal capacitors, unequal diodes,
etc) If Vx must always be average zero - you'll need to do something
else.
If you can handle a little voltage drop, don't care what happens to
Vx, and don't mind adding a few parts, make a cheapo regulator with a
zener and BJT? (Or maybe use TL31 instead of zener)
What about a small transformer, one winding on primary, center tapped
on secondary. Add a diode and a cap for each leg - and there you go!
Anyway, there's lots of ways to do this. If regulated output is what
you want, a little more work is required.
gene
_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user