Inside the text file: “From your prof. Don’t buy the $180 book. Do buy coffee for the person next to you. And for god’s sake, learn the small-signal model—you’ll need it for your job interview at TI.”
So she did something she knew she shouldn’t. She opened her browser and typed:
There it was. The purple band at the top. The word “INTERNATIONAL” stamped under the title. Chapter 12—flawless. Problem 8.47—the one with the cascode current source—now had the correct resistor value.
"Microelectronic Circuits" by Adel S. Sedra and Kenneth C. Smith is a widely used textbook in the field of microelectronics. The 8th edition of this book is a comprehensive resource that provides in-depth coverage of microelectronic circuits.
Because the 8th edition of Sedra/Smith was different. Oxford University Press had cracked down hard after the 7th edition leaked everywhere. The “International Edition” wasn’t just a cheaper cover. It had different problems, reordered chapters, and—most infamously—a rewritten Chapter 12 on frequency response that actually fixed the typos from the North American version.