无线音频设计平衡接收机范围、音质

　　无线音频设计平衡接收机范围、音质

　　市场对更大移动性的需求导致传统有线音频娱乐产品向无线移动。由于产品制造商希望切断对娱乐电子产品的束缚，工程师们在维持电池供电的无线音频设计的信号范围、声音质量和最大播放时间方面面临重大挑战。为了满足这些要求，工程师可以从多个厂家提供丰富的产品，包括（按字母顺序）的模拟设备，Cirrus Logic，CSR，飞思卡尔半导体线性技术，Linx技术，集成产品，芯片技术，恩智浦半导体，quickfilter技术，德克萨斯文书，其中许多人。

　　在典型的无线娱乐系统（图1）中，源信号通过具有可选范围扩展器的无线rf接口传输到播放器系统，如立体声耳机或扬声器。在播放器中，相应的无线rf接口接收由编解码器、音频处理器或dsp处理的信号，以生成驱动扬声器的最终模拟信号。一个适当的电源，通常包括一个电池和充电管理电路，完成系统。

　　Figure 1： A typical wireless audio system depends on reliable wireless communications between transmitter and receiver， as well as efficient audio processing at the receiving end. （Courtesy of Texas Instruments.）

　　In creating a wireless entertainment design， engineers face particular challenges in both wireless communications and audio processing. Reliable RF communications with high throughput and signal integrity is vital for ensuring an uninterrupted audio experience for the user even at extended ranges from the audio source. At the same time， robust audio signal processing is essential for maintaining audio fidelity and delivering the range of audio features expected in the marketplace. Available integrated solutions targeted for each of these subsystems can help engineers meet these requirements while reducing design complexity and cost.