Download or read book Design of a Crystal Oscillator for an All digital Phase locked Loop in 0 18um CMOS written by Sri Harsha Grandhi and published by . This book was released on 2017 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A phase-locked loop (PLL) is widely used on many integrated circuits to provide an accurate and stable clock. A PLL uses negative feedback around an on-chip oscillator that the feedback loop constantly adjusts to match the phase and frequency of an input reference clock. This project focused on the design of a crystal oscillator in 0.18 um CMOS, which is used to provide an accurate reference clock for an all digital phase-locked loop. This design makes use of an on-chip oscillator which utilizes an external off-chip crystal to provide a highly accurate frequency. The crystal oscillator circuit was designed using Cadence Virtuoso computer-aided design (CAD) software, and verified using the Spectre circuit simulator across different process, supply voltage, and temperature (PVT) variations.
Download or read book A Current mode Logic Frequency Divider for an All Digital Phase locked Loop in 0 18um CMOS written by Sruthi Penmetsa and published by . This book was released on 2016 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A phase-locked loop (PLL) is an important mixed-signal circuit that is used on almost every integrated circuit. A frequency divider is needed in the PLL loop to allow the use of a low frequency reference clock that is typically provided by a highly accurate off-chip crystal oscillator. This project is focused on the design of a current-mode logic (CML) frequency divider in 0.18um CMOS for an all digital phase-locked loop. Current-mode logic is used for the first few stages of the overall frequency divider, where the frequency of operation is too high for standard CMOS logic to operate properly. For this project, a CML frequency divider was designed in 0.18um CMOS and simulations were performed to verify performance for typical as well as worst case conditions.
Download or read book A Programmable Frequency Divider for an All Digital Phase locked Loop in 0 18um CMOS written by Monica Yerranagula and published by . This book was released on 2016 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: A phase-locked loop is needed on nearly every integrated circuit to align the phase and frequency of the clock created by the on-chip oscillator to an external reference clock. This project was to design and simulate a programmable frequency divider in 0.18um CMOS for an all digital phase-locked loop integrated circuit. The frequency divider can provide one of four different output frequencies, based on the input control bits. Schematics for the programmable frequency divider were designed using Cadence Virtuoso, and simulations were performed using the Spectre simulator. Simulations were run for both typical and worst-case variations of process, supply voltage, and temperature.
Download or read book Design of a Crystal Oscillator and Current mode Input output Pads for a High speed CMOS Phase locked Loop written by Viral Jhala and published by . This book was released on 2006 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of High Performance CMOS Voltage Controlled Oscillators written by Liang Dai and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design of High-Performance CMOS Voltage-Controlled Oscillators presents a phase noise modeling framework for CMOS ring oscillators. The analysis considers both linear and nonlinear operation. It indicates that fast rail-to-rail switching has to be achieved to minimize phase noise. Additionally, in conventional design the flicker noise in the bias circuit can potentially dominate the phase noise at low offset frequencies. Therefore, for narrow bandwidth PLLs, noise up conversion for the bias circuits should be minimized. We define the effective Q factor (Qeff) for ring oscillators and predict its increase for CMOS processes with smaller feature sizes. Our phase noise analysis is validated via simulation and measurement results. The digital switching noise coupled through the power supply and substrate is usually the dominant source of clock jitter. Improving the supply and substrate noise immunity of a PLL is a challenging job in hostile environments such as a microprocessor chip where millions of digital gates are present.
Download or read book Low Noise Low Power Design for Phase Locked Loops written by Feng Zhao and published by Springer. This book was released on 2014-11-25 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces low-noise and low-power design techniques for phase-locked loops and their building blocks. It summarizes the noise reduction techniques for fractional-N PLL design and introduces a novel capacitive-quadrature coupling technique for multi-phase signal generation. The capacitive-coupling technique has been validated through silicon implementation and can provide low phase-noise and accurate I-Q phase matching, with low power consumption from a super low supply voltage. Readers will be enabled to pick one of the most suitable QVCO circuit structures for their own designs, without additional effort to look for the optimal circuit structure and device parameters.
Download or read book Phase locked Loops written by Roland E. Best and published by McGraw-Hill Companies. This book was released on 1993 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unique book/disk set that makes PLL circuit design easier than ever. Table of Contents: PLL Fundamentals; Classification of PLL Types; The Linear PLL (LPLL); The Classical Digital PLL (DPLL); The All-Digital PLL (ADPLL); The Software PLL (SPLL); State Of The Art of Commercial PLL Integrated Circuits; Appendices; Index. Includes a 5 1/4" disk. 100 illustrations.
Download or read book Phase Locked Loops written by Woogeun Rhee and published by John Wiley & Sons. This book was released on 2023-12-19 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase-Locked Loops Discover the essential materials for phase-locked loop circuit design, from fundamentals to practical design aspects A phase-locked loop (PLL) is a type of circuit with a range of important applications in telecommunications and computing. It generates an output signal with a controlled relationship to an input signal, such as an oscillator which matches the phases of input and output signals. This is a critical function in coherent communication systems, with the result that the theory and design of these circuits are essential to electronic communications of all kinds. Phase-Locked Loops: System Perspectives and Circuit Design Aspects provides a concise, accessible introduction to PLL design. It introduces readers to the role of PLLs in modern communication systems, the fundamental techniques of phase-lock circuitry, and the possible applications of PLLs in a wide variety of electronic communications contexts. The first book of its kind to incorporate modern architectures and to balance theoretical fundamentals with detailed design insights, this promises to be a must-own text for students and industry professionals. The book also features: Coverage of PLL basics with insightful analysis and examples tailored for circuit designers Applications of PLLs for both wireless and wireline systems Practical circuit design aspects for modern frequency generation, frequency modulation, and clock recovery systems Phase-Locked Loops is essential for graduate students and advanced undergraduates in integrated circuit design, as well researchers and engineers in electrical and computing subjects.
Download or read book Monolithic Phase Locked Loops and Clock Recovery Circuits written by Behzad Razavi and published by John Wiley & Sons. This book was released on 1996-04-18 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Featuring an extensive 40 page tutorial introduction, this carefully compiled anthology of 65 of the most important papers on phase-locked loops and clock recovery circuits brings you comprehensive coverage of the field-all in one self-contained volume. You'll gain an understanding of the analysis, design, simulation, and implementation of phase-locked loops and clock recovery circuits in CMOS and bipolar technologies along with valuable insights into the issues and trade-offs associated with phase locked systems for high speed, low power, and low noise.
Download or read book Design of a Digitally Controlled Oscillator for an Integrated Circuit Phase locked Loop written by Riaz Ahmad and published by . This book was released on 2017 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The project focuses on the design and simulation of a digitally-controlled oscillator (DCO) for an all-digital phase-locked loop in a 180nm CMOS process. A ring oscillator with cross-coupled inverter-based delay cells was employed to reduce jitter. The cross-coupled inverters reduce jitter by keeping edge rates high by means of positive feedback. A binarily-weighted capacitive load DAC was used at the output of each delay cell to adjust the frequency of oscillation. Large device sizes were required in the delay cells because each delay cell drives a large capacitive load of 256 unit capacitors and switches in the capacitive load DAC. In addition, the outer pair of inverters used in each delay cell have to be large enough to be able to overcome the previous logic state held by the internal pair of cross-coupled inverters. A wide frequency range with low jitter was successfully achieved.
Download or read book A New Programmable Low Noise All Digital Phase locked Loop Architecture written by Justin L. Gaither and published by . This book was released on 2005 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the electronics industry today almost without exception there are phase-locked loops (PLL) implemented within each system and often within each integrated circuit (IC). In fact, most PLL's are implemented monolithically within ICs without any or with very few external components. Additionally, most are implemented as Analog PLL's utilizing only a digital phase detector. This is also evident in the majority of recent publications which focus on PLL structures with on-chip voltage controlled oscillators using charge pumps and ring or LC oscillators. However, the problem with most on-chip VCO's is that they are far noisier than the external crystal types. The noise in the integrated oscillators forces designers to use larger loop bandwidths than would be required with less noisy VCO's; subsequently they have poor noise filtering capabilities. Additionally, analog PLL's are usually fixed in nature. Loop components such as charge-pumps and loop filters are implemented as analog components with little or no flexibility. The focus of this thesis is the design and implementation of a very low cost, low noise Programmable All Digital PLL (ADPLL) which utilizes a low cost digital to analog converter (DAC), a voltage controlled crystal oscillator (VCXO), and a field programmable gate array (FPGA). The use of FPGA technology for digital design implementation is universal in the industry and provides benefits far beyond the implementation of ADPLL's. In fact, in almost every system today, an FPGA already exists. Therefore, the inclusion of a DPLL within existing system components would be at little or no cost. The implementation of the PLL digitally not only allows us to implement it within an FPGA, but also allows us to adapt and configure the PLL for many applications and tune it for best performance. Digital circuits also have increased noise margin and are not affected by the same noise issues associated with Analog PLL's such as temperature, voltage and noise coupled from other signals or circuits. The DPLL developed is flexible and can be configured to operate as a clock and data recovery circuit (CDR), clock multiplier, clock synthesizer, or noise filtering PLL. Using an external VCXO provides a very low noise basis for the PLL and such that we can implement very low bandwidths without sacrificing the quality of its output. In this thesis we will present the theory, architecture, design, hardware and implementation of the ADPLL in addition to the results of the testing of the prototype ADPLL that was built.
Download or read book Nanometer Frequency Synthesis Beyond the Phase Locked Loop written by Liming Xiu and published by John Wiley & Sons. This book was released on 2012-08-14 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introducing a new, pioneering approach to integrated circuit design Nanometer Frequency Synthesis Beyond Phase-Locked Loop introduces an innovative new way of looking at frequency that promises to open new frontiers in modern integrated circuit (IC) design. While most books on frequency synthesis deal with the phase-locked loop (PLL), this book focuses on the clock signal. It revisits the concept of frequency, solves longstanding problems in on-chip clock generation, and presents a new time-based information processing approach for future chip design. Beginning with the basics, the book explains how clock signal is used in electronic applications and outlines the shortcomings of conventional frequency synthesis techniques for dealing with clock generation problems. It introduces the breakthrough concept of Time-Average-Frequency, presents the Flying-Adder circuit architecture for the implementation of this approach, and reveals a new circuit device, the Digital-to-Frequency Converter (DFC). Lastly, it builds upon these three key components to explain the use of time rather than level to represent information in signal processing. Provocative, inspiring, and chock-full of ideas for future innovations, the book features: A new way of thinking about the fundamental concept of clock frequency A new circuit architecture for frequency synthesis: the Flying-Adder direct period synthesis A new electronic component: the Digital-to-Frequency Converter A new information processing approach: time-based vs. level-based Examples demonstrating the power of this technology to build better, cheaper, and faster systems Written with the intent of showing readers how to think outside the box, Nanometer Frequency Synthesis Beyond the Phase-Locked Loop is a must-have resource for IC design engineers and researchers as well as anyone who would like to be at the forefront of modern circuit design.
Download or read book Phase Lock Loops and Frequency Synthesis written by Venceslav F. Kroupa and published by John Wiley & Sons. This book was released on 2003-06-02 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase lock loop frequency synthesis finds uses in a myriad of wireless applications - from local oscillators for receivers and transmitters to high performance RF test equipment. As the security and reliability of mobile communication transmissions have gained importance, PLL and frequency synthesisers have become increasingly topical subjects. Phase Lock Loops & Frequency Synthesis examines the various components that make up the phase lock loop design, including oscillators (crystal, voltage controlled), dividers and phase detectors. Interaction amongst the various components are also discussed. Real world problems such as power supply noise, shielding, grounding and isolation are given comprehensive coverage and solved examples with MATHCAD programs are presented throughout. * Presents a comprehesive study of phase lock loops and frequency synthesis in communication systems * Written by an internationally-recognised expert in the field * Details the problem of spurious signals in PLL frequency synthesizers, a topic neglected by available competing titles * Provides detailed theorectical background coupled with practical examples of state-of-the-art device design * MATHCAD programs and simulation software to accompany the design exercises and examples This combination of thorough theoretical treatment and guidance on practical applications will appeal to mobile communication circuit designers and advanced electrical engineering students.
Download or read book Design of Phase locked Loop Circuits with Experiments written by Howard M. Berlin and published by Prentice Hall. This book was released on 1978 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of All Digital Phase locked Loop in Serial Link Communication written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Southeast University written by and published by . This book was released on 2007 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultra low Power Phase locked Loop and Crystal Oscillator Design for IoT Applications written by 劉子瑄 and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
