A Single-Chip WCDMA Envelope Reconstruction LDMOS PA with 130MHz Switched-Mode Power Supply
A Single-Chip WCDMA Envelope Reconstruction LDMOS PA with 130MHz Switched-Mode Power Supply
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具有130MHz开关模式电源的单芯片WCDMA包络重构LDMOS PA
DOI：
10.1109/isscc.2008.4523308
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
C. Garnier
中科院分区：
文献类型：
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作者：
V. Pinon;F. Hasbani;A. Giry;D. Pache;C. Garnier
本文介绍了一种用于蜂窝应用的单片电流变电路。它包括一个高频带PA及其开关模式电源调制器在同一硅芯片上，从而避免了外部GaAs芯片的需要。在1.95GHz载波频率下，差分功率放大器在31 dBm处的PAE达到60%。电源调制器是一个单线圈开关电源，没有额外的线性放大器.由于其130 MHz PWM，它具有15 MHz AC带宽，无预失真，并在2 W输出功率下实现83%的峰值效率。在27 dBm和3.6V电源电压下，WCDMA信号的总体发射机峰值PAE为49%。仔细的PCB实施使开关谐波低于-60dBc。ER系统在无预失真的情况下，在27 dBm下实现了-39/-47 dBc的第一/第二ACLR和低于4%的均方根EVM，符合WCDMA要求。
This paper presents a single-chip ER circuit for cellular applications. It includes a high-band PA and its switched-mode supply modulator on the same silicon die, which avoids the need for an external GaAs chip. The differential PA reaches 60% PAE at 31dBm with a 1.95GHz carrier. The supply modulator is a single- coil SMPS with no additional linear amplifier. It features a 15MHz AC bandwidth without pre-distortion thanks to its 130MHz PWM and achieves 83% peak efficiency at 2W output power. The overall transmitter peak PAE with a WCDMA signal is 49% at 27dBm and at 3.6V supply voltage. Careful PCB implementation keeps switching harmonics below -60dBc. The ER system achieves -39/-47dBc 1st/2nd ACLR and rms EVM below 4% at 27dBm without pre-distortion, in compliance with WCDMA requirements.