analog signal conditioning circuit

[shaikss]

Hi,

For any biomedical applications, the sensor output has to be amplified and digitized.
For amplification, we use Instrumentation amplifier. But the output of IA has some dc voltage. So, how to suppress the dc voltage. At the same time, all biomedical signals are low frequency signals in the order of 0 to 20Hz. Which filter technique is better to use?
Is it good to go for Low pass/High pass/Band pass filter? Can you pls throw some light on this?

 

[chuckey]

Low pass and use a big capacitor to get rid of the DC. Use a second OPamp to null/balance out the DC level.
Frank