時脈與資料回復型式之近身通訊接收機和延遲鎖相迴路型式之藍芽接收機

Abstract

隨著科技的進步，慢性疾病應該長期被監控與觀察。而生醫感測器可以達到量測生醫訊號的目的。量測完生醫訊號之後，從不同點量測到的訊號將會被傳遞到終端中心。一般而言，傳輸方法使用的是無線傳遞的方式。在這裡我們將使用人體來當作一個傳輸介質，這種型式的通訊方式被稱作近身通訊。從發送器直接傳輸數位訊號的方法，將減輕發送器電路的設計複雜度。我們也還需要一個近身通訊的接收器來接收帶有60赫茲雜訊的衰減數位訊號。因此我們使用了一個單晶時脈資料回復型式的接收機來進行近身通訊。 藍芽接收機廣泛的使在藍芽通訊系統，多種的解調器都可以解調頻率移位鍵結訊號。而比較其它不同種類的解調器，延遲鎖相迴路型式的解調器具有低功率消耗並且可以簡單的設計出消除頻率位移問題的電路。因此，我們提出了一個應用在藍芽通訊系統，頻率在2.4兆赫茲以延遲鎖相迴路型式的接收機，並具有頻率位移消除的功能。

With advanced technology, a chronic disease should be monitored and observed for a long term. The biosensor achieves the purpose that can measure the biomedical signal. After measuring the biomedical signal, measured signals from different points will be transmitted to local center. Generally, the method of transmission is wireless transmission. Here, we will use human body as the transmission media. The type of communication is called intra body communication (IBC). The method of directly transmitting digital signal from transmitter can release much complexity of transmitter design. We also need an IBC receiver which can receive digital signal with signal loss and 60 Hz noise. Therefore, we will present a monolithic CDR (clock and data recovery) based receiver for intra body communication. The Bluetooth receiver is widely used in the Bluetooth communication system. Various demodulators can demodulate the FSK signal. Comparing with other types of demodulators, the DLL (delay-locked loop) based demodulator has low power consumption and simple circuit design of cancelling frequency offset. Therefore, we proposed a 2.4GHz DLL based receiver with frequency offset calibration which can apply to Bluetooth communication system.