Instrumentation amplifier

[slchen]

Dear all:

I prepare to design an instrumentation amplifier in an single chip!
So I need to design 3 OPAMPs and several resistors in the chip.
What shold be concerned about this OPAMPs?
What architecture of OP is suitable for instrumentation amplifier?
Thanks!

Best Regards,
slchen

 

[OpAmp]

Usually Instrumentation amplifiers are for amplifying low frequency signals. So the offset voltage and 1/f noise of the opamps are the biggest concerns (usually). So if you want to use a CMOS process for you design, you may have to use autozeroing or chopper stabilization to eliminate the offset and 1/f noise of opamps.

OpAmp

 

[slchen]

Thanks for your help! OpAmp.

I have another question.
The Instrumentation amplifier is used to detect and amplify ECG (Electrncardiogram) signal.
Can I use fully differential OP to replace this Instrumentation amplifier?

Best Regards,
slchen