Biopotential Amplifier Design doubt!!

[brylope]

Hi.. I am Vviekananda from Louisiana State University.... doing my masters... I am planning to design a Amplifier for a Biopotential sensor.... I am confused as what device to choose.... Please help me in this regard.... CMOS or OTA or Instrumentation amplifier or something else totally....

What is the best device that can be used to design a Biopotential sensor amplifier?

biopotential's are: Electroencephalography(EEG), ECG, EOG etc...

Please help me suggesting some devices and also explain me why yu feel that is best... Thanks in advance

 

[shravankumar]

Hi i am shravan u can design three opmap IA or Current balancing IA for improving the CMRR
u will get so many information on CBIA architecture

Thanks
Shravan

 

[brylope]

Please explain me how it is better than operational transconductance amplifier! thanx for ur previous reply.. am looking into it

 

[shravankumar]

Please explain me how it is better than operational transconductance amplifier! thanx for ur previous reply.. am looking into it

For CMRR matching of resistance is required in case of OTA based IA(three opamp IA design)
if u use CBIA need not required matching case, it is just like covertning ur difference voltage to current and current to voltage
CBIA is better in case of CMRR over the OTA based IA