H. S. Black: inventing the negative feedback amplifier (1977)

Bricolo · 12th June 2006, 06:14 PM

Hi all,

I've been trying to find an old article from IEEE Spectrum magazine; called "inventing the negative feedback amplifier" from H. S. Black (Mr I discovered and patented negative feedback)

No success with IEEE explore, but I'm not very familiar with this search tool.

Does anyone have the article; or know where to find it?

Thanks

AndrewT · 12th June 2006, 09:19 PM

Hi,
down load Walt Jung's history section in the Opamp manual he edited. The whole manual runs to many MB in PDF and about 400pages.

Lots of evidence that negative feedback dates back to the 30s and I suspect that NFB amps came not much later.

RetroAudio · 12th June 2006, 09:36 PM

If memory serves, I believe Mr. Black did do this back in the 30's. He was taking a ferry on his way to work at Bell Labs when he came up this. Not sure how much this is true.

sawreyrw · 12th June 2006, 10:33 PM

It's true and it happened in 1927. A google search of "harry (or harold) black" and "negative feedback" will turn up 100s of hits.

steve jones · 13th June 2006, 01:25 AM

Paul Voigt patented negative feedback for motion control of his loudspeaker.

http://stereophile.com/reference/70/index7.html

Bricolo · 13th June 2006, 06:12 AM

Yes, black's theory is much older than 1977, but I'm looking for THAT specific article

steve, thank you for your input, I didn't know that

steve jones · 13th June 2006, 02:41 PM

You might try searching old issues of HFN&RR for an article about Voigt and negative feedback. I remember reading about that in the early 90's. The article was well written, had sketches and diagrams and pretty much layed out the case for Voigt owning prior art on negative feedback.

12th June 2006, 06:14 PM	#1
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	H. S. Black: inventing the negative feedback amplifier (1977) Hi all, I've been trying to find an old article from IEEE Spectrum magazine; called "inventing the negative feedback amplifier" from H. S. Black (Mr I discovered and patented negative feedback) No success with IEEE explore, but I'm not very familiar with this search tool. Does anyone have the article; or know where to find it? Thanks __________________ Just remember: in theory there's no difference between theory and practice. But in practice it usually is quite a bit difference... Bob Pease

12th June 2006, 09:19 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, down load Walt Jung's history section in the Opamp manual he edited. The whole manual runs to many MB in PDF and about 400pages. Lots of evidence that negative feedback dates back to the 30s and I suspect that NFB amps came not much later. __________________ regards Andrew T.

13th June 2006, 01:25 AM	#5
steve jones diyAudio Member Join Date: Mar 2002 Location: Vancouver USA	A little earlier than Black.... Paul Voigt patented negative feedback for motion control of his loudspeaker. http://stereophile.com/reference/70/index7.html

13th June 2006, 06:12 AM	#6
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	Yes, black's theory is much older than 1977, but I'm looking for THAT specific article steve, thank you for your input, I didn't know that __________________ Just remember: in theory there's no difference between theory and practice. But in practice it usually is quite a bit difference... Bob Pease

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12th June 2006, 09:36 PM	#3
RetroAudio diyAudio Member Join Date: Mar 2004 Location: Everett, WA	If memory serves, I believe Mr. Black did do this back in the 30's. He was taking a ferry on his way to work at Bell Labs when he came up this. Not sure how much this is true.

12th June 2006, 10:33 PM	#4
sawreyrw diyAudio Member Join Date: Apr 2006 Location: Minnesota	It's true and it happened in 1927. A google search of "harry (or harold) black" and "negative feedback" will turn up 100s of hits.

13th June 2006, 02:41 PM	#7
steve jones diyAudio Member Join Date: Mar 2002 Location: Vancouver USA	You might try searching old issues of HFN&RR for an article about Voigt and negative feedback. I remember reading about that in the early 90's. The article was well written, had sketches and diagrams and pretty much layed out the case for Voigt owning prior art on negative feedback.

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