Quantcast
Channel: Forums - Recent Threads
Viewing all articles
Browse latest Browse all 262198

INA326: Filter configuration on the INA326 and replacing for the INA128

$
0
0

Part Number:INA326

Hi

Im currently using the INA326 for an EMG filter. I see that the suggested schematic has a filter in it. When trying to calculate the frequency it didn't correspond tho the 1kHz it says. Here I have a first question:

1) How the filter was calculated and how can I re calculate it to hava a cut-off frequency at 400Hz??

Question 2:

I was having a problem and the suggested answer was the lack of the path for the bias current. I put some resistors in it and the output remained at ~-800mV but this time it was stable. Im guessing this is normal no? to have an offset caused for the electrodes. Am I right? I used 47K, 1M and 10M and the behavior was the same...

I was thinking on changing the INA326 for the INA128. So here come questions 3 and 4

3)Does the filter at 1kHz can be applied to the INA128? I mean... can I use the same schematic as the one for the INA326?

4)I tried to do a High Pass filter to remove the offset by adding a capacitor in series with Rg (something like image below)

 But when measuring with the oscilloscope, the output signal still had the offset... Why it didn't work as a high pass filter? or did I miss something?

Thanks for the help! 


Viewing all articles
Browse latest Browse all 262198

Trending Articles



<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>