← 返回 JSSC 论文列表JSSC 2010第12期RF & Wireless0.35μm
A Two-Phase Switching Hybrid Supply Modulator for RF Power Amplifiers With 9 Effic
提出一种用于射频功率放大器的双相切换混合供电调制器，提升效率和带宽。
0.35-μm CMOS, 4 MHz 0.4–2.8 V 全波整流正弦波, WCDMA 包络信号
双相切换混合供电调制器射频功率放大器包络跟踪脉冲宽度调制
▸创新点1：系统创新 - 采用双相切换技术显著降低电感电流纹波，通过两相电流共享和专用斜坡发生器实现，静态效率提升9%，同时减少输出纹波和功率损耗。
▸创新点2：系统创新 - 引入片上带通滤波器扩展开关放大器的跟踪带宽至4MHz，无需提高开关频率或牺牲并联控制环路的稳定性，动态效率提升8-12%。
▸创新点3：电路创新 - 优化超级源跟随输出级设计，显著降低线性放大器的输出阻抗，增强其高驱动能力和宽带性能，适用于极性发射器应用。
▸创新点4：方法创新 - 结合高效开关放大器与低输出阻抗线性放大器的并联架构，实现宽带宽（0.4-2.8V全波整流正弦波跟踪）与低纹波的混合调制，适用于WCDMA等现代无线标准。
Abstract
mber , IEEE, and Philip K. T. Mok , Senior Member , IEEE
Abstract—A hybrid supply modulator consisting of a parallel
operation of a high-drive, low output impedance, wideband
class-AB linear amplifier and a high-efficiency, wideband,
low-ripple switching amplifier is presented for the application
of polar transmitters. At system level, a two-phase switching is
employed to lower the inductor current ripple so that both the
output ripple and power loss are reduced. On-chip feed-forward
bandpass filter