Woogeun Rhee
Woogeun Rhee 是清华大学集成电路学院教授，IEEE Fellow。研究方向包括低功耗 RF 收发机、频率合成器和无线 SoC 设计。他指导的团队在 CP-less hybrid PLL 和低压 BLE 发射机方面有系统性工作。
代表著作
| 论文 | 期刊 | 年份 | 核心贡献 |
|---|---|---|---|
| A Bias-Current-Free Fractional-N HPLL for Low-Voltage Clock Generation | TCAS-I Vol.68 | 2021 | CP-less bias-current-free HPLL + notch filter |
| A 0.6-V High-Efficiency BLE TX Using a Hybrid PLL With RDAC-Based CM Ripple Cancellation | JSSC Vol.60 | 2025 | 0.6V BLE TX + RDAC CM cancel + class-E/F₂ |
技术贡献
- CP-less HPLL：JK-FF PD + 被动 LPF → 无电荷泵、无偏置电流 → 0.65V 低压工作
- Programmable notch filter：解耦参考杂散与环路稳定性（Twin-T, ±30% 可调）
- FIR-embedded ΔΣ 调制：降低分数-N 量化噪声 + 增强 PD 线性
- RDAC CM ripple cancellation：差分 varactor 失配补偿 → 杂散抑制 >18 dB
- 0.6V BLE TX 系统集成：SCS D/VCO + shared bias resistor + class-E/F₂ PA → 25.1% 效率
双向链接
- 清华 CP-less Hybrid PLL 与 BLE TX 深度解析 — 2021 TCAS-I + 2025 JSSC
- Hybrid PLL架构与技术 — §4.3-4.4, §9
- PLL基本结构与传递函数
- 环路滤波器与电荷泵PLL
- 振荡器设计与相位噪声