Radio has always felt like a kind of magic to me, and I’ve wanted to build one on a chip for years. In my 2024 review I set myself a goal: a pair of Tiny Tapeout projects that can send and receive data with just a couple of short wire antennas.

I made some progress - a ring oscillator, an R2R DAC, level shifters and amplifiers - but that still left a lot missing for a working radio.