In message <[email protected]>, Brooke Clarke writes: >My old Gibbs rack mount 5 MHz standard used the LM723 linear regulator. >I believe it's one of the lowest noise regulators you can use. >http://www.national.com/mpf/LM/LM723.html#Overview
If you really want to get low noise, you do the "amplify noise by -1" trick. Vicor has a special "afterburner" module you can hook after their switchers, which does this. The trick is that you don't really need much power in the amplifier, it just have to be able to cancel out the noise, a trivial transistor or op-amp will do. If you really want to go radical, take a peek at Nationals AN1651, study the two opamps at the top of the schematics... Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
