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当今的数字式蜂窝电话生产厂家的竞争集中体现在价格、尺寸及电池寿命三个方面。而这三个因素均与选择电话所用的元器件有关,尤其是输出放大器。输出放大器的效率影响电池的使用寿命和热能损耗,功率放大器的效率越高,电池寿命就越长,热能损耗就越小。
The competition from today’s digital cellular phone manufacturers is concentrated in three areas: price, size and battery life. All three of these factors are related to the components used to select the phone, especially the output amplifier. The efficiency of the output amplifier affects the life of the battery and the heat loss. The higher the efficiency of the power amplifier, the longer the battery life and the smaller the heat loss.