Phase-Locked Loops

A phase-locked loop, or PLL, is a circuit that produces an output signal whose phase stays in a fixed relationship with an input signal. A typical example is an oscillator that adjusts itself to match the input's phase. Because coherent communication depends on this alignment, the theory and design of PLLs underpin electronic communication of nearly every kind. This book, whose full title adds the subtitle System Perspectives and Circuit Design Aspects, offers a compact and approachable route into PLL design. It explains where these circuits sit within modern communication systems, works through the core techniques of phase-lock circuitry, and surveys the many electronic communication settings where PLLs are applied. It presents modern architectures alongside theoretical foundations and pairs that theory with detailed design guidance. The coverage begins with PLL fundamentals, supported by analysis and examples written for circuit designers. It then turns to applications in both wireless and wireline systems, and to the practical design of frequency generation, frequency modulation, and clock recovery circuits. The intended readers are graduate students and advanced undergraduates studying integrated circuit design, along with researchers and engineers working in electrical and computing fields.