Delete comment from: Ken Shirriff's blog
Hello. I'm confused about Q23. In the schematic it shows it as a diode formed from B to C. Does this mean that it's an NPN with the emitter floating? I can't tell from the die what this structure is. It's also confusing because in Camenzind's book he shows Q23 as a typical diode connected PNP transistor. He also has R10 as 15K instead of 82K. Is there any way to tell from the die any of this stuff? Thanks for the article, by the way. Amazing work.
Nov 19, 2024, 8:52:48 PM
Posted to 555 timer teardown: inside the world's most popular IC