Understanding silicon circuits: inside the ubiquitous 741 op amp


Ken Shirriff’s writes, “The 741 op amp is one of the most famous and popular ICs with hundreds of millions sold since its invention in 1968 by famous IC designer Dave Fullagar. In this article, I look at the silicon die for the 741, discuss how it works, and explain how circuits are built from silicon.”

Details at┬áKen’s blog.

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1 Comment

  1. Ubiquitous at one time, I guess. I remember wearing a t-shirt with the 741 schematic on it about 35 years ago. I haven’t seen it actually used on any boards in quite a while. I’d guess the quad LM324 took its place as the “jellybean”, since it is just a few pennies per opamp.

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