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该论文提出一种用于5G NR功率放大器的符号功率跟踪(SPT)供电调制器，采用混合降压-升压转换器架构，实现了102ns/V的快速电压转换速率和94.3%的峰值效率，解决了SPT在循环前缀(CP)时间内完成电压跳变(最短1.17μs)的挑战。
As 5G communication technology advances, the power consumption of radio frequency power amplifiers (RFPAs) in 5G systems has become increasingly critical. To enhance efficiency, Symbol Power Tracking (SPT) has emerged as a key technique, allowing dynamic adjustment of the RFPA supply voltage to match the instantaneous power demands of each symbol. SPT must achieve these voltage transitions within the brief duration of the cyclic prefix (CP), as short as 1.17μs in frequency range 1 (FR1: 410MHz ~7125MHz), posing significant design challenges. Hybrid buck-boost converters without a right half-plane (RHP) zero are introduced in [1,2] to improve tracking speed. However, their MHz-range switching frequency, needed for high efficiency, requires large output capacitors (CL) and inductors, limiting tracking speed to the order of microseconds per volt (μs/V). Auxiliary LDOs are often added in parallel to accelerate CL charging [3], but this significantly degrades dynamic
Minghao Shang, Baochuang Wang, Changjin Chen, Ji Jin, Lin Cheng
University of Science and Technology of China, Hefei, China