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slchen
Joined: 23 Nov 2005
Posts: 76
Helped: 1
Location: CC
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 06 Feb 2006 9:43 Instrumentation amplifier |
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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
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OpAmp
Joined: 19 May 2003
Posts: 57
Helped: 14
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| 06 Feb 2006 17:30 Instrumentation amplifier |
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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
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slchen
Joined: 23 Nov 2005
Posts: 76
Helped: 1
Location: CC
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| 07 Feb 2006 3:19 Re: Instrumentation amplifier |
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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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