From: Joerg Hansmann (info_at_jhansmann.de)
Date: 2002-01-10 22:37:03
Hi,
----- Original Message -----
From: sleeper75se <sleeper75se_at_yahoo.se>
To: <buildcheapeeg_at_yahoogroups.com>
Sent: Thursday, January 10, 2002 9:16 AM
Subject: [buildcheapeeg] Re: New input stage
> Hi Jim, Joerg and all.
>
> I've updated the input stage schematic a bit, so now it is more
> flexible. New version is in the files-section.
...
[many improvements]
I have done a simulation (see attachment, SWCAD3 simulation source
included) on the supply decoupling network and have some questions:
You get heavy voltage drop on the 220 Ohms resistors.
To meet the minimum supply voltage of the LT1167 of +-2.3 V
you would have to use a voltage supply that has greater equal
+-3.8 V.
In the AC-simulation the supply decoupling network has only
moderate effect above 2kHz. Below 2 kHz it has 0dB attenuation.
Why are you not using a star formation to a low impedance source
instead of this ladder formation ?
Regards,
Joerg
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