tag:blogger.com,1999:blog-26385730250380897.post4279944799937699839..comments2024-02-26T16:02:17.461-05:00Comments on Reading Jim Williams: App Note 25Doctor Analoghttp://www.blogger.com/profile/10331958951440669259noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-26385730250380897.post-49884521407462694132012-06-13T15:29:34.923-04:002012-06-13T15:29:34.923-04:00This is the 100-million dollar app note. Apple com...This is the 100-million dollar app note. Apple computer was designing their first laptop, and Steve Young came across this app note. He called Jim up, and explained they needed the whole power system designed for the notebook, including the cold-cathode fluorescent (CCFL) lamp driver for the back-light. Jim supposedly told Steve: "Hang on, I am going to call you right back from Bob Dobkin's office." The upshot is that Jim and Carl Nelson went and worked at Apple's campus for 4 months, and that is what sentenced Jim to work on CCFL power supplies for a decade or so. Jim begged Dobkin to take him off the projects, but Jim was delivering working hardware, and that is a pretty seductive thing. All in all, the chips Apple bought from Linear Tech made them $100 or $200 million over the years, if I remember what Steve Young said at the Jim Williams remembrance at the Computer History Museum. That is one wicked app note, a few pages that brings in that much money.Paul Rakohttp://www.rako.comnoreply@blogger.comtag:blogger.com,1999:blog-26385730250380897.post-16687755257126464652011-08-22T15:55:47.101-04:002011-08-22T15:55:47.101-04:00Thanks!Thanks!Doctor Analoghttps://www.blogger.com/profile/10331958951440669259noreply@blogger.comtag:blogger.com,1999:blog-26385730250380897.post-58540497249777623232011-08-22T10:39:46.161-04:002011-08-22T10:39:46.161-04:00The screenshots are definitely from the dual beam ...The screenshots are definitely from the dual beam 556 scope. Note how the graticule is designed for the upper and lower beam (with two horizontal "zero" lines, one three div. below the top and one three div. above bottom).zebonauthttp://electronics.stackexchange.com/users/930/zebonautnoreply@blogger.com