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Chip Amps Amplifiers based on integrated circuits

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Old 30th July 2009, 12:32 AM   #1
NSLogan is offline NSLogan  United States
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Default How a 741 opamp works

can some please explain or point me to a high quality tutorial that explains how the 741 op amp works.
http://upload.wikimedia.org/wikipedi...velcolored.png
i'm trying to start at the very basics of diy audio by understanding how the basis of the headphone amplifiers i hope to design in the future work.

Thanks
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Old 30th July 2009, 01:09 AM   #2
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Try google. You will find it.
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Old 30th July 2009, 10:14 AM   #3
AndrewT is offline AndrewT  Scotland
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I have been told that the 741 is almost unique in that it can be inserted into it's socket the wrong way round and it will survive. Turn it around and it works.

A cheap chip to check your circuits are powered correctly.
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Old 30th July 2009, 11:04 AM   #4
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Google after
"Opamps for everyone"
"Opamp applications Walt Jung"

There you will have nearly 1000 pages!
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Old 31st July 2009, 05:18 AM   #5
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And don't forget to read the datasheet.
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Old 31st July 2009, 06:21 AM   #6
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Old 1st August 2009, 02:32 PM   #7
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Here is a classic for analog IC.

Analysis and Design of Analog Integrated Circuits (4th Edition) by Paul R. Gray, Paul J. Hurst, Stephen H. Lewis, Robert G. Meyer, Robert G. Meyer
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Old 1st August 2009, 08:29 PM   #8
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When you uploaded the schematic to post #1, you must have overlooked chapter 6, where it is explained in detail.
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Old 2nd August 2009, 02:33 AM   #9
Cliff45 is offline Cliff45  United States
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Since this seems to be a request from someone just starting to become familiar with operational amplifiers, I hesitate to mention the textbook "Design with Operational Amplifiers and Analog Integrated Circuits", written by Sergio Franco. This is not "lightweight reading" by any stretch of the imagination, I assure you. This text covers from "stem to stern" nearly everything relevant to op-amp design and circuit modeling, and is chock full of intimidating algebraic madness. At over 600 pages, it's a reference source that I find myself going back to now and then when I can't remember some minute detail of a particular op-amp related design. Mr. Franco delivers in this one, for sure.

Also, it uses the good old uA741 for many of it's examples, plus Chapter 5 covers many of the various internals of the 741's circuit designs, with full descriptions and coverage of the various workings in tireless detail.


FWIW - Lots of these are on the "used" market, this text has been used for years in many EE programs all over the world. My ancient 1988 edition was given to me by a friend who left the engineering field some time ago.


-HTH
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