> The TI regulators are, from my perspective extremely noisy, one can do > much better at least for higher output voltages. > They also don't have a high enough output for the TADD-1.
Agreed, that that regulator doesn't have sufficient margin for the entire TADD-1. I was suggesting using the low-noise high PSRR linear reg only to establish the bias level. There are indeed better parts. This one looks pretty good for an integration solution (not include three C's): http://datasheets.maxim-ic.com/en/ds/MAX6126.pdf This app note, which filters the MAX6126 with an additional pass transistor and opamp, shows how to get down to 6 nv/sqrt(hz): http://www.maxim-ic.com/appnotes.cfm/appnote_number/3657 > < other circuit suggestions > > This avoids blowing fuses if the supply polarity is reversed. Or a PZT. We use a lot of them in the power circuit for hot plug sockets, like on disk shelves. (A fuse is cheaper wrt to the BOM, but the warranty costs kill you.) > The problems of instability and coupling of power supply noise into the > signal path were also present when single supply discrete transistor > amplifier were the norm. > Quite elaborate bias divider decoupling circuitry was used to minimise > the effect. Yeah, at some point a bipolar design becomes easier, right? -ch _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts