電機資訊學院: 電信工程學研究所指導教授: 黃天偉謝澤毅Hsieh, Tse-YiTse-YiHsieh2017-03-062018-07-052017-03-062018-07-052016http://ntur.lib.ntu.edu.tw//handle/246246/276480近年來由於市場需求以及半導體製程的進步，無線通訊產業也越來越發達，隨著電路操作頻率不斷的提升，使得高頻積體電路的設計越來越重要。對於系統電路而言，不論是類比數位或是射頻應用，都需要一個乾淨的時脈產生器來提供穩定且精確的訊號源，使系統能維持更好的運作。本論文以射頻收發系統中所需的本地振盪器為應用範疇，實現了三個不同頻段的時脈產生電路，分別為低雜訊Ku-band電壓控制振盪器、X-band頻率合成器以及X-band雷達頻率調製連續波產生器。 第二章我們詳細介紹鎖相迴路內部架構和原理以及對鎖相迴路做迴路分析。 第三章實現了Ku-band的電壓控制振盪器，採用了NMOS交錯耦合對之LC共振式架構，為了降低輸出相位雜訊，在共振腔內加入了一個定電容，達到減少使用電感以提升整體共振腔的品質因素，為了避免負載效應引響操作頻率及電路特性，在振盪器的輸出端加入了共源極組態的緩衝放大器，並將汲極電阻以電感替換，減少電阻性的損耗以降低雜訊的引響。 第四章實現了X-band頻率合成器，採用了NMOS交錯耦合對電壓控制振盪器，以達到較低的功耗、較好的相位雜訊以及更大的輸出功率，整體迴路由電流模式邏輯(Current mode logic, CML)、真單相時脈(True single phase clock, TSPC)除頻器以及多模除頻器(Multi-modulus frequency divider, MMD)組合成除頻鏈，搭配靜態改良式相位頻率偵測器和只使用NMOS開關的充電泵配合迴路濾波器構成，在低功耗的條件下也有不錯的特性。 第五章設計了X-band雷達頻率調製連續波產生器，以第四章的X-band頻率合成器為基礎加入了三角積分調變器以及數位調變的控制，利用計數器的上下計數來切換三角積分調變器，以控制多模除頻器可以切換除數，使迴路在低通濾波器產生週期性的充放電以達到三角波的輸出。In recent years, the wireless communications industries become more and more popular due to market demand. With the circuit operating frequency constantly upgrading, the high-frequency integrated circuit design is increasingly important. For system circuits, whether analog or digital RF applications, we need a clean clock generator to provide a stable and accurate signal source to improve the system performance. In this thesis, we achieve a clock generation circuit in three different frequency bands. A Ku-band low noise voltage controlled oscillator, an X-band frequency synthesizer and an X-band radar frequency modulated continuous wave generator, respectively. In chapter 2 we detailed introduce the principles and analysis of phase-locked loop circuits. In chapter 3, a Ku-band voltage controlled oscillator has been designed and implemented. Using LC resonant architecture with the NMOS cross-coupled pair can reduce the output phase noise. To improve the overall resonator quality factor, an additional capacitance is added and the use of inductance can be deducted. In order to avoid the load effect affecting the operating frequency and the characteristics of circuit, a common source buffer amplifier is added and the drain resistors can be replaced by inductance to reduce the resistive loss and the noise of the circuit. In Chapter 4, an X-band frequency synthesizer has been designed and implemented. Using a LC voltage controlled oscillator with NMOS cross couple pairs to achieve low power consumption, good phase noise and greater output power. The whole divider chain circuit can be implemented by the current-mode logic frequency divider (CML), true single-phase clock (TSPC) frequency divider and a multi-mode frequency divider (MMD). The circuit is composed by phase frequency detector with modified static type, charge pump with only NMOS switches, third-order loop filter and the above VCO and divider chain. In addition, the circuit at low power conditions also has good characteristics. In Chapter 5, an X-band radar frequency modulated continuous wave generator has been designed. Based on the X-band frequency synthesizer in Chapter 4, the delta-sigma modulator and digital modulation are added to generate FMCW performance. Using counter counts up and down to switch the delta-sigma modulator. The delta-sigma modulator can switch the division ratio of the multi-mode frequency divider, and the low-pass filter can generate a periodic charge and discharge in order to achieve a triangular wave output.論文使用權限: 不同意授權鎖相迴路頻率合成器電壓控制振盪器FMCWX-bandPhase-Locked LoopFrequency SynthesizerCross couple pair VCOthesis10.6342/NTU201603266