From: Joerg Hansmann (info_at_jhansmann.de)
Date: 2002-01-29 03:41:31
Hi Andreas,
----- Original Message -----
From: Andreas Robinson <sleeper75se_at_yahoo.se>
To: <buildcheapeeg_at_yahoogroups.com>
Sent: Monday, January 28, 2002 3:35 PM
Subject: [buildcheapeeg] Brainmaster input stage
> Ok, second try. The brainmaster input stage, slightly
> modified, attached as a text file.
What do you think about the AD620 input current noise
(especially at low frequencies) relating to the high-impedance
high-pass network C4,R4 and C5,R5 ?
I have used a similar (HP with asymmetric bias path) network
with INA114 and got disastrous results (many uV of low frequency
noise)
> > Component values:
> > R4: 10M 1% metal film
> > R5: 10M 1% metal film
...
> > C4: 0.01 uF 2% polypropylene
> > C5: 0.01 uF 2% polypropylene
...
Regards,
Joerg
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