[time-nuts] Re: Dual Supplies for Low Offset Phase Noise Analyzer

[Poul-Henning Kamp]

With apologies for being late to this party, I want to add
a single anecdotal datapoint:

I once used a LM3886 "audio" power-op-amp to turn a +30V supply
into a +/-15V supply and that worked really well, mostly because
it is a really well-designed low-noise chip, partly because it was
two orders of magnitude more beefy than required, but also because
this is the only way to /guarantee/ that the PSU noise becomes
symmetric around the zero.

Yes, it is a €10 part, but I happened to have it laying around...

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.