Instrumentation amplifier

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slchen

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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
 

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

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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
 

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