A 9-to-12GHz Coupled-RTWO FMCW ADPLL with 97fs RMS Jitter, -120dBc/Hz PN at 1MHz Offset, and With Retrace Time of 12.5ns and 2μs Chirp Settling Time. - Hyman Shanan; Declan Dalton; Vamshi Chillara; Pablo Dato (ISSCC, 2022)