[sdiy] simple s&h problem

[Philippe Derenne]

Hi Karl,

Which type of cap do you use ?

Phil.

----- Original Message ----- 
From: "Karl Ekdahl" <elektrodwarf at yahoo.se>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, September 14, 2005 12:39 AM
Subject: [sdiy] simple s&h problem


> hi list, i'm trying to do a simple s&h with two opamps
> (tl0x1) a mosfet (bs107), a 1uF cap and misc
> resistors. the problem is that it drops inbetween
> 10-20mV *every time* i stop sampling, it's reallly
> annoying....
> 
> so, just generally, should this setup work with a
> +-1mV error tolerance? it might be my psu maybe....
> 
> last time i had annoying problems like this my meter
> hjad went out of battery and had a bad cable at the
> same time...
> 
> karl