A Design of Analog PLL-Based Self-Calibrated Open-Loop FSK Modulator for BLE Advertising Transmitter. - Donggyu Kim; Jun-Eun Park; Howon Kim 004; Sang-Sun Yoo; Yeonjae Jung; Yo-Chuol Ho; Seokkee Kim; Kang-Yoon Lee (IEEE Trans. Circuits Syst. II Express Briefs, 2024)