For more photos of the ML10 chip and an explanation of how it works (it uses a "state variable filter"), see my latest article:
https://www.righto.com/2026/10/ML10-switched-capacitor-filter.html
Thanks to @CuriousMarc for providing the chip.
@kenshirriff @CuriousMarc Good evening, how are you? I'm new here and would like to get to know you, if that's alright—I'm new to the area and would like to expand my circle of friends.
Sadly I had several of these over the years but never successfully employed them in the mode in which they were intended. I built a "cassette tape interface" for a microcomputer that used one and I could never get it to recover the data reliably. I was still pretty ignorant about signal levels and good electrical construction techniques at the time so it wasn't too surprising. Gave me a real dislike for 'analog' stuff. 😃
@kenshirriff @CuriousMarc Back when I worked at Linear Technology, I wrote this bio of Nello Sevastopoulos. He designed the MF10. As a firsthand recollection, I didn't question his statements - I just wrote them down. Other folks were doing similar work at the same time and a lot of them knew each other from the ISSCC shows. (This is a bio, not a technical story.) All those original guys were fascinating.
https://analogfootsteps.blogspot.com/2014/03/guru-6-nello-sevastopoulos.html
#LinearTechnology #AnalogFootsteps