《Phase Lock Techniques》Floyd M. Gardner - 锁相环技术详解

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"Phase Lock Techniques. 作者:Floyd M. Gardner,第三版,一本关于锁相环技术的专业书籍,由John Wiley & Sons, Inc. 出版。" 《Phase Lock Techniques》是Floyd M. Gardner撰写的一本经典著作,专门探讨锁相环(Phase-Locked Loop,PLL)技术。这是一项在通信、电子工程和信号处理领域至关重要的技术。锁相环是一种能够使两个信号之间保持恒定相位关系的电路系统,它广泛应用于频率合成、频率分频、频率倍增、相位调制解调、时钟恢复等多种场景。 在本书的第三版中,Gardner深入浅出地介绍了锁相环的基本原理、设计方法以及应用实例。他从理论基础出发,包括相位噪声、频率稳定性和环路滤波器设计等关键概念,逐步引导读者理解锁相环的工作机制。此外,他还涵盖了现代PLL技术的最新进展,如数字 PLL(DPLL)和全集成化 PLL 设计,这些内容对于理解和应对现代通信系统的挑战至关重要。 书中详细讨论了以下几个核心知识点: 1. **基本原理**:锁相环的核心组成部分包括电压控制振荡器(VCO)、分频器、相位比较器和环路滤波器。VCO根据输入电压改变其输出频率,相位比较器检测输入参考信号与VCO信号之间的相位差,环路滤波器平滑误差电压并提供给VCO。 2. **环路动态性能**:锁相环的性能指标,如锁定时间、捕捉范围、相位噪声和稳态误差,都与环路的闭环传递函数密切相关。Gardner详细分析了这些参数对系统性能的影响。 3. **环路滤波器设计**:环路滤波器的选择和设计对PLL性能至关重要。它决定了环路带宽、相位噪声和瞬态响应。书中介绍了各种类型的滤波器,如低通滤波器、带通滤波器和数字滤波器的设计方法。 4. **应用实例**:Gardner提供了丰富的应用实例,如无线通信中的频率合成、数据通信中的时钟恢复、卫星导航系统的信号处理等,帮助读者将理论知识应用于实际问题。 5. **数字PLL(DPLL)**:随着数字信号处理技术的发展,DPLL已经成为现代通信系统中的重要组件。DPLL利用数字信号处理算法实现相位比较和滤波,具有灵活性高、精度好等优点。 6. **集成化设计**:现代PLL常采用集成电路形式,书中也涉及了集成化设计的挑战和解决方案,包括电源噪声抑制、工艺兼容性和功耗优化等。 这本书不仅适合电子工程和通信工程的学生作为教材,也是从事相关领域的工程师和研究人员的重要参考资料。通过阅读本书,读者可以全面了解和掌握锁相环技术,从而在实践中解决复杂的频率和相位控制问题。
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The first edition of this book was published in 1966 and the second in 1979. Phaselock was an unimaginably exotic subject in 1966, with limited applications and few practitioners. Now phaselock is a mature subject: myriads of phaselock loops are ensconced in the world’s electronic devices; numerous applications include phaselock loops; large numbers of practitioners deal with phaselock. No other books on phaselock loops existed when the first edition was published, but more than 20 exist today. Why is a third edition justified at this time? In 1966, a simple, short introduction to the basics of the subject was needed for an audience for whom phaselock was strange and new. Today, phaselock loops are firmly established in the mainstream of electronics engineering. Much new information on phaselock loops has accumulated over the years, and several topics once thought important have proved to be ephemeral. Experience has taught me that certain explanations would be better presented from revised viewpoints. There is no need for another introductory text; that function is well served by a number of the books listed in Section 1.3 and probably others as well. Instead, this book reexamines the traditional phaselock topics in greater depth than previously. In addition, much new material has been included, some of it never before published. Examples of additions include revised and expanded material on transfer functions, two chapters related to phase noise, two chapters related to digital phaselock loops, a chapter on charge-pump phaselock loops, expanded material on phase detectors, and a chapter on anomalous phaselocking.