無線音頻設計平衡接收機范圍、音質

　　市場對更大移動性的需求導致傳統有線音頻娛樂產品向無線移動。由于產品制造商希望切斷對娛樂電子產品的束縛，工程師們在維持電池供電的無線音頻設計的信號范圍、聲音質量和最大播放時間方面面臨重大挑戰。為了滿足這些要求，工程師可以從多個廠家提供豐富的產品，包括（按字母順序）的模擬設備，Cirrus Logic，CSR，飛思卡爾半導體線性技術，Linx技術，集成產品，芯片技術，恩智浦半導體，quickfilter技術，德克薩斯文書，其中許多人。

　　在典型的無線娛樂系統（圖1）中，源信號通過具有可選范圍擴展器的無線rf接口傳輸到播放器系統，如立體聲耳機或揚聲器。在播放器中，相應的無線rf接口接收由編解碼器、音頻處理器或dsp處理的信號，以生成驅動揚聲器的最終模擬信號。一個適當的電源，通常包括一個電池和充電管理電路，完成系統。

　　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.