A 6.78-MHz Wireless, Mode-Convertible Single-Stage Resonant CC/CV Battery Charger for Implantable Biomedical Devices. - Byeongwoo Yoo; Joongyu Kim; Minjae Kim; Minsung Kim; Jeongho Choi; Daehong Kim; Gunwook Park; Sung-Yun Park (IEEE Trans. Biomed. Circuits Syst., 2026)