Comments

• Chip, Your blog posts helped a lot, thanks. Very interesting.  

  in Where Are the High Gain Amps? Comment by Gyorgy September 2014
• Hi all, So how many bits of the 24 in the ADC does the OpenBCI get? Thanks

  in Where Are the High Gain Amps? Comment by Gyorgy August 2014
• Ferdinand, A gain of 24 is not enough for microvolt (millionths of a volt) level inputs. These preamp circuits are not high-gain. Even just to use the 8 least significant bits, the input would need to be amplified around 400 times at least, (1 vol…

  in Where Are the High Gain Amps? Comment by Gyorgy August 2014
• Hi wjcroft, Thank you for that info. I see from the description at the top of the ADS1299 datasheet that it was designed for EEG. I'm still amazed though, that it works without preamps with microvolt input signals. Just eerie. Thanks.    

  in Where Are the High Gain Amps? Comment by Gyorgy August 2014