A Low-Supply, Sub-mW 1 GHz Ring Oscillator Achieving < 5% Frequency Variation Across PVT for Reliable On-Chip Clocking. - Vellanki Venkata Sundara Raghava Chetan Krishna; Busam Karthikeya; Santosh Yachareni; Saraswatula Sree Rama Krishna Chaithnya; Abhishek Srivastava (VLSID, 2026)