Delete comment from: Ken Shirriff's blog
I think it's 24 transistors in the shift register stage-? I'm very new to electronics, but studying the two schematics, I think it's clever how in the first loop, two transistors logically combine inversion of the output with a transmission gate enabled by the clock, saving two transistors. Love the blog, thanks for all the fascinating posts!
Jan 5, 2022, 8:58:23 PM
Posted to Reverse-engineering a tiny 1980s chip that plays Christmas tunes