A multi-band CMOS power amplifier has been realized to be used in high-efficiency handset applications. The proposed PA is based on class-E stage linearized using envelope elimination and restoration (EER) technique. In order to cover multiple frequency bands, a wide-band passive output matching network is designed and combined with band-select feature. This allows switching between two wide-band output matching networks; increasing frequency coverage and yet satisfying the criteria of high rejection of out-of-band emissions. A design methodology is introduced to optimize the values required for the wide-band passive network. The design has been implemented using CMOS 0.13 μm technology. Simulation results show frequency coverage from 800 MHz to 2.2 GHz with peak efficiency more than 60% (before taking the effect of supply modulator) and 47% after taking the losses of the supply modulator into account. The designed EER system achieves excellent linearity performance. The test and validation process includes LTE test signal with 16 QAM modulation scheme and signal bandwidth of 20 MHz.

已经实现了一种多频段CMOS功率放大器，可用于高效手机应用中。提出的功率放大器基于使用包络消除和恢复（EER）技术线性化的E类级。为了覆盖多个频带，设计了一个宽带无源输出匹配网络，并将其与频带选择功能结合在一起。这样可以在两个宽带输出匹配网络之间切换；增加频率覆盖范围，但仍满足带外发射的高抑制标准。引入了一种设计方法来优化宽带无源网络所需的值。该设计已使用CMOS 0.13μm技术实现。仿真结果表明频率覆盖范围为800 MHz至2。2 GHz的峰值效率超过60％（在考虑电源调制器的影响之前），在考虑了电源调制器的损耗之后达到47％。设计的EER系统具有出色的线性性能。测试和确认过程包括具有16 QAM调制方案和20 MHz信号带宽的LTE测试信号。