基于NB-IoT发射机的混合电源调制电路  

A Hybrid Power Supply Modulation Circuit Based on NB-IoT Transmitter

作　　者：梁振 石磊 徐肯 邓进丽 林树明 LIANG Zhen;SHI Lei;XU Ken;DENG Jinli;LIN Shuming(Guangzhou Letswin Microelectronics Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]广州粒子微电子有限公司,广东广州510663

出　　处：《现代信息科技》2020年第24期60-62,66,共4页Modern Information Technology

基　　金：广东省重点领域研发计划项目(2019B010142002)。

摘　　要：为解决由NB-IoT高均峰比调制信号引起功率回退,进而导致功率放大器效率变低的问题,文章采用40 nm 1P6M CMOS工艺设计,研究了一款适用于NB-IoT极性调制发射机的混合电源调制电路。芯片测试结果表明,当发射机的输出功率为23.48 dBm时,采用此电路的极性调制发射机的效率可以提升12.0%,测量的发射机EVM(误差矢量幅度)为6.9%,占用带宽为175.22 kHz,整体性能均满足3GPP测试规范要求。In order to solve the problem of power back-off caused by high PAPR modulation signal of NB-IoT,further lead to the low efficiency of power amplifier,a hybrid power supply modulation circuit for NB-IoT polar modulation transmitter is designed by means of using 40 nm 1P6m CMOS process planning.The chip test results show that when the output power of transmitter is 23.48 dBm,the efficiency of the polar modulation transmitter using this circuit can be improved by 12.0%,the measured transmitter EVM(error vector magnitude)is 6.9%,and the occupied bandwidth is 175.22 kHz.The overall performance meets the requirements of 3GPP test specification.

关 键 词：混合电源调制器 CLASS-AB放大器 CLASS-D放大器 极性调制发射机 

分 类 号：TN752[电子电信—电路与系统]