%0 Journal Article %J IEEE Journal of Solid-State Circuits %D 2021 %T A 0.5V 560-kHz 18.8-fJ/Cycle On-Chip Oscillator with 96.1-ppm/°C Steady-State Stability Using a Duty-Cycled Digital Frequency-Locked Loop %A Daniel S. Truesdell %A Shuo Li %A Benton H. Calhoun %B IEEE Journal of Solid-State Circuits %G eng