This is not a "low noise" PS, IMO. There is far too much ripple on the outputs for that.
Furthermore, I'd bet it has real radiated EMI issues. -John ============= > At 16:41 -0500 08-03-2011, ewkeh...@aol.com wrote: >>There is an interesting article in the March 2011 Electronic Products >>magazine "design an ultra low noise supply for analog circuits. It is a >>combination of switcher and LDO's and written by P Hunter TI so it >>may also be available on their site. > > This one, I presume: > <http://www2.electronicproducts.com/Designing_an_ultra_low_noise_supply_for_analog_circuits-article-fapo_TI_mar2011-html.aspx> > ? Bit of a shame to use LDOs and then still drop 50% of the output > voltage. Also, Fig 2 is meaningless without a measurement bandwidth > spec. > > There are other ways to get a cleaner bipolar supply from a switcher, > several of them simpler than what's shown here. You could take a > SEPIC/Cuk hybrid, or pick a switcher that allows you to trade > efficiency for switch slew rate like the LT1533. Some useful > techniques are documented in <http://www.linear.com/docs/4159>. > > JDB. > [not affiliated with Linear Tech other than being a satisfied customer] > -- > Years from now, if you are doing something quick and dirty, > you imagine that I am looking over your shoulder and say to > yourself, "Dijkstra would not like this," well that would be > immortality for me. -- Edsger Dijkstra, 1930 - 2002 > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.