Clock and Data Recovery Based Intra-Body Communication Receiver and Delay-Locked Loop Based Bluetooth Receiver

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。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.he 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.Table of Contentshapter 1 Introduction 1.1 Motivation 1.2 Organization 2hapter 2 Architecture And Principle 4.1 Introduction 4.2 Delay-locked loop (DLL) 4.2.1 Delay-locked loop architecture 4.2.2 Operation of delay-locked loop 6.2.3 System analysis 7.2.4 Stuck locking and harmonic locking 11.3 Clock and data recovery (CDR) 14.3.1 NRZ and RZ signal 14.3.2 Clock and data recovery system introduction 15.3.3 Analysis of CDR 16.3.3.1 Jitter performance 16.3.3.2 Full rate CDR and half rate CDR 16.3.3.3 With reference clock and without reference clock CDR architecture [2.1] 18hapter 3 CDR Based Intra-Body Communication Receiver 22.1 Introduction 22.2 System Architecture 23.3 Circuit implementation 25.3.1 Modify Hogge Phase Detector 25.3.2 Frequency Detector 29.3.3 Charge pump 32.3.4 Current-starving Ring Oscillator 33.3.5 Multi-ratio divider 34.4 Measurement results 36.4.1 Measurement setup 36.4.2 Current starving VCO 38.4.3 Digital signal Demodulator 40.4.4 CDR 41.4.5 IBC receiver 43.5 Summary 47hapter 4 2.4GHz GFSK DLL Based Bluetooth Receiver with Frequency Offset Calibration 49.1 Introduction 49.2 System Architecture 50.3 Circuit implementation 51.3.1 Low noise Amplifier (LNA) 51.3.2 Mixer 52.3.3 Poly-phase filter 54.3.4 Limiting Amplifier with DC offset cancellation 56.3.5 RSSI 60.3.5.1 Principle of RSSI 60.3.5.2 Circuit implement 62.3.6 DLL based demodulator 63.3.6.1 GFSK demodulation introduction 63.3.6.2 Frequency discrimination 63.3.6.3 DLL based FSK demodulator 64.3.6.4 Digital calibration 68.3.6.5 Voltage-controlled delay cell 69.3.6.6 Phase detector 70.3.6.7 Charge pump 70.4 Measurement result 72.4.1 Measurement setup 72.4.2 LNA measurement result 74.4.3 Mixer & poly phase filter measurement result 75.4.4 DLL & RSSI measurement result 76.4.5 Demodulator measurement result 78.5 Summary 83ibliography 84ppendix A 8