Ad811 Vs. Lm7171??

mfahimi · 3rd August 2009, 06:12 PM

Hi,
Im trying to do reverse engineering on a project. Why would someone replace an AD811 with LM7171. What is the difference?

Thank you
M

gfiandy · 7th August 2009, 12:10 PM

to be able to answer this question we need more information on the circuit.

The AD part is current feedback and I think the LM part is a high speed voltage feedback. Depending on the circuit this coudl be inportant or not.

Regards,
Andrew

MaxS · 9th August 2009, 09:32 AM

Hello

National publish some notes about that.
OA-30 for confrontation between CFB and VFB amps.

As Gfiandy say, it really depends on circuit. Draw it for further explanations

Regards,

MaxS

3rd August 2009, 06:12 PM	#1
mfahimi diyAudio Member Join Date: Aug 2009	Ad811 Vs. Lm7171?? Hi, Im trying to do reverse engineering on a project. Why would someone replace an AD811 with LM7171. What is the difference? Thank you M

9th August 2009, 09:32 AM	#3
MaxS diyAudio Member Join Date: Mar 2006 Location: France	Some notes about that Hello National publish some notes about that. OA-30 for confrontation between CFB and VFB amps. As Gfiandy say, it really depends on circuit. Draw it for further explanations Regards, MaxS __________________ Ca marche pas ! Tu ne l' as pas branché non plus ....

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7th August 2009, 12:10 PM	#2
gfiandy Audio Engineer diyAudio Member Join Date: Jul 2003 Location: Cambridge UK	to be able to answer this question we need more information on the circuit. The AD part is current feedback and I think the LM part is a high speed voltage feedback. Depending on the circuit this coudl be inportant or not. Regards, Andrew

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