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仅仅在三年前,GSM功率放大器解决方案的整合度还很不理想,传送系统解决方案需要不同的组件支持低频、高频和功率控制,输入和输出的匹配电路也需要多颗离散零件,另外还有谐波讯号的滤波功能、解耦合电容以及电源控制功能的所有支持零件。当时无法实现功能整合的原因在于制程技术、仿真工具、对于高Q值(低损耗)被动零件的需求以及3GPP(GSM)规格的严格要
Just three years ago, the convergence of GSM power amplifier solutions was far from ideal. Transmission system solutions required different components to support low frequency, high frequency, and power control. Input and output matching circuits also required multiple discrete components. In addition There are harmonic signal filtering, decoupling capacitors and power control functions of all supporting parts. The reasons for the unavailability of functional integration at the time were process technology, simulation tools, the need for high Q (low loss) passive components, and the strict requirements of the 3GPP (GSM) specification