[sdiy] super-duper S/H

rsdio at audiobanshee.com rsdio at audiobanshee.com
Thu May 21 09:34:23 CEST 2015


Thanks for the report, Ian!

I might just order some of the LMC660 and swap them in on a quad S/H PCB that I'm working on. Sure beats the cheap old TL084.

I was just reading my copy of H & H over a hamburger, but it's mentioned in chapter 4 of the 2nd edition.

Brian


On May 20, 2015, at 8:02 PM, Ian Fritz <ijfritz at comcast.net> wrote:
> BTW, the application is a super-duper S/H utilizing the tiny (2 fA) input bias of the 662 and tandem switches to eliminate switch leakage.  (H & H, ch. 6) I am able to get < 20 fA leakage at 10 nF holding capacitance for C0G, PP, and PS caps.  The resistances and times are staggering, plus I can easy sample up to 10kHz.
> 



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