Talk:Negative feedback amplifier

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[edit] Patent mentioned

Can someone confirm that the patent mentioned (2,102,671) is a US patent, that it really is by Black, and from which year it is.

From one reference list the patent number is 2,102,761, and is from 1937..

Related to feedback amplifiers is the asymptotic gain model.

The formula pertains to a difference input, but the figure uses a summer. —Preceding unsigned comment added by 85.166.73.253 (talk) 12:43, 19 January 2008 (UTC)

Changed figure - thanks Brews ohare (talk) 06:10, 24 January 2008 (UTC)

[edit] Clarification

I'm not sure what the note "A subtle point is that the main amplifier may not be a two port" means. Clarification please? -Roger (talk) 00:11, 24 January 2008 (UTC)

I tried a clarification. See how it sits. Brews ohare (talk) 01:56, 24 January 2008 (UTC)
I have removed the obscurity by referring the reader to Jaeger.

Brews ohare (talk) 15:06, 24 January 2008 (UTC)

I've also added a final section that explains the importance of the port condition.

Brews ohare (talk) 02:00, 26 January 2008 (UTC)