Delete comment from: Ken Shirriff's blog

Ed said...

Nice post! The 25 microchips article estimates that 741s sold in the hundreds of millions - I might have guessed even higher.

An interesting thing about resistors on planar semiconductors: the resistance depends on the aspect ratio of the rectangle (or snake) so resistances tend to be sized in 'squares' - often the exact sheet resistance in ohms per square isn't important. But you do have to account for corners, if you can't match the number of corners. I think a corner is worth about half a square. And orientation might matter too, so try to match that.

Oct 30, 2015, 2:02:36 PM

Posted to Understanding silicon circuits: inside the ubiquitous 741 op amp