Download or read book Performance Analysis of Different Voltage Controlled Delay Lines in a Delay locked Loop written by Harold H. Bautista and published by . This book was released on 2012 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bus interfaces keep getting faster and thus requiring designers to build custom physical fabrics that are able to delay clock and(or) data, on their transmitter and receivers, in order to properly receive and send data with enough setup and hold times. Delay locked loops (DLLs) have become fundamental building blocks that address such problems. Not only are they present in physical layers in integrated circuits but they also solve the problem of VLSI systems that suffer from clock skew and jitter. This report focuses on the implementation of a standard DLL and three different voltage controlled delay topologies. The different topologies are designed and compared for metrics such as linearity, delay range, and sensitivity to power supply.
Download or read book A Delay locked Loop for Multiple Clock Phases delays Generation written by Cheng Jia and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A Delay-Locked Loop (DLL) for the generation of multiple clock phases/delays is proposed. Several new techniques are used to help enhance the DLLs performance, specifically, to achieve wide lock range, short locking time, and reduced jitter. The DLL can be used for a variety of applications which require precise time intervals or phase shifts. The phase detector (PD), charge pump (CP), and voltage-controlled delay line (VCDL) are the three most important blocks in a DLL. In our research, we have proposed a novel structure which integrates the functionality of both the PD and CP. By using this structure, a fast switching speed can be achieved. Moreover, the combined PD and CP also lead to reduced chip area and better jitter performance. A novel phase detection algorithm is developed and implemented in the combined PD and CP structure. This algorithm also involves a start-control circuit to avoid locking failure or false lock to harmonics. With the help of this algorithm, the proposed DLL is able to achieve lock as long as the minimum VCDL delay is less than one reference clock cycle, which is the largest possible lock range that can be achieved by the DLL. The VCDL uses fully differential signaling to minimize jitter. The delay stage of the VCDL is built with a differential topology using symmetrical loads and replica-feedback biasing, which provides a low sensitivity to supply and substrate noise as well as a wide tuning range. In addition, a shift-averaging technique is used to improve the matching between delay stages and thus to equalize the delay of each individual stage.
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 Single Event Transient Modeling and Mitigation Techniques for Mixed signal Delay Locked Loop DLL and Clock Circuits written by Pierre Maillard and published by . This book was released on 2014 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase locked Loops Their Application written by William C. Lindsey and published by . This book was released on 1978 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A 200 833 MHz Delay Locked Loop for DDR Memory Applications written by Brett Patrick Delaney and published by . This book was released on 2016 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: As memory I/O bandwidth continues to increase beyond the current multi-gigabit rates for high performance computer systems, there remains a need for a stable and robust method of clock synchronization capable of transferring data reliability between main memory and a CPU memory controller. A Delay Locked Loop (DLL) is often utilized in such a system where synchronization and removal of clock skew are necessary. Synchronization in DLL’s is carried out by continually adjusting the phase of a clock signal by adding or removing delay based on feedback provided by a Phase Detector (PD). Once phase alignment occurs, the DLL is said to be in a “Locked” state. Delay can be produced with either a VCDL (Voltage Controlled Delay Line), or a DCDL (Digitally Controlled Delay Line). Each type of delay line has their own benefits and drawbacks, many of which will be discussed throughout this paper. This thesis provides an overview of previous DLL design research, and presents a functional 45nm CMOS, 200-833 MHz delay locked loop.
Download or read book A Performance Analysis of the Delay Line Descriminator written by Frederick W. Ratcliffe and published by . This book was released on 1984 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of High order Delay locked Loops for Frequency Selectivity written by Yan Li and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "In this thesis, a pole-zero positioning method in high-order DLL design is presented and verified through simulations and physical experiments. The general approach is based on selecting the transfer function of the closed-loop DLL and deriving the loop filter behavior based on the gain of the phase-detector and voltage-controlled delay line. The proposed approach does not rely on the principle of design based on achieving a desired phase margin specifications but rather is based on selecting a closed-loop DLL behavior based on a desired transfer function. Two types of transfer functions, i.e., the Gaussian transfer function that has the minimum settling time behavior and the a class of transfer functions that have minimum propagation delay, are analyzed and compared in high-order DLL designs. The MATLAB/Simulink simulation results are provided to support the conclusion that Gaussian transfer function is more favorable when the DLLs are used as time-mode filters (TMF). Based on the aforementioned method, a DLL integrated circuit (IC) is designed and fabricated using IBM CMOS 130 nm technology. It contains the PFD, CP, VCDL and input/output buffers on-chip and the loop-filters are designed off-chip. A 4-layer PCB was designed, together with the DLL IC, to come up with a set of 2nd to 8th order DLL circuits. The building blocks and the ancillary circuits are discussed in detail. The performances of the high-order DLLs are tested and evaluated by comparing the measured results to their expected values. The design method is verified by the experimental results. " --
Download or read book Microelectronics Failure Analysis written by EDFAS Desk Reference Committee and published by ASM International. This book was released on 2011 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes bibliographical references and index.
Download or read book Microelectronics Electromagnetics and Telecommunications written by Ganapati Panda and published by Springer. This book was released on 2018-11-02 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book discusses the latest developments and outlines future trends in the fields of microelectronics, electromagnetics and telecommunication. It contains original research works presented at the International Conference on Microelectronics, Electromagnetics and Telecommunication (ICMEET 2018), organised by GVP College of Engineering (A), Andhra Pradesh, India. The respective papers were written by scientists, research scholars and practitioners from leading universities, engineering colleges and R&D institutes from all over the world, and share the latest breakthroughs in and promising solutions to the most important issues facing today’s society.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of First International Conference on Computational Electronics for Wireless Communications written by Sanyog Rawat and published by Springer Nature. This book was released on 2022-01-03 with total page 679 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes high-quality papers presented at Proceedings of First International Conference on Computational Electronics for Wireless Communications (ICCWC 2021), held at National Institute of Technology, Kurukshetra, Haryana, India, during June 11–12, 2021. The book presents original research work of academics and industry professionals to exchange their knowledge of the state-of-the-art research and development in computational electronics with an emphasis on wireless communications. The topics covered in the book are radio frequency and microwave, signal processing, microelectronics and wireless networks.
Download or read book Microelectronics Fialure Analysis Desk Reference Seventh Edition written by Tejinder Gandhi and published by ASM International. This book was released on 2019-11-01 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Electronic Device Failure Analysis Society proudly announces the Seventh Edition of the Microelectronics Failure Analysis Desk Reference, published by ASM International. The new edition will help engineers improve their ability to verify, isolate, uncover, and identify the root cause of failures. Prepared by a team of experts, this updated reference offers the latest information on advanced failure analysis tools and techniques, illustrated with numerous real-life examples. This book is geared to practicing engineers and for studies in the major area of power plant engineering. For non-metallurgists, a chapter has been devoted to the basics of material science, metallurgy of steels, heat treatment, and structure-property correlation. A chapter on materials for boiler tubes covers composition and application of different grades of steels and high temperature alloys currently in use as boiler tubes and future materials to be used in supercritical, ultra-supercritical and advanced ultra-supercritical thermal power plants. A comprehensive discussion on different mechanisms of boiler tube failure is the heart of the book. Additional chapters detailing the role of advanced material characterization techniques in failure investigation and the role of water chemistry in tube failures are key contributions to the book.
Download or read book Study on Delay Line Search in Delay Locked Loop written by 劉漢錚 and published by . This book was released on 2011 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soft Computing written by and published by Allied Publishers. This book was released on 2005 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Delay Line Frequency Discriminator Based Phase Noise Filter written by Shilei Hao and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Low phase noise clock is critical for high performance electronic systems. This dissertation proposes phase noise filter (PNF) techniques to suppress the phase noise for any given clock. The PNF is enabled by the passive delay line and phase detector /charge pump (PD/CP) based frequency discriminator (FD). The delay-locked loop and DC offset cancellation loop are embedded in the PNF to achieve fully automatic calibration. A passive on-chip voltage controlled delay line cascaded with an off-chip SAW filter is adopted to achieve the balance of delay time, bandwidth and phase noise. The proposed PNF is insensitive to the amplitude noise due to the PD/CP based phase extraction feature. The first proof-of-concept 10 GHz PNF achieves 10.6/15 dB phase noise suppression with -116/-114.9 dBc/Hz phase noise sensitivity at 1 MHz offset in low and high gain mode, respectively, with a 20 ns DL. The suppression offset frequency range is 100 kHz-12 MHz with 9.97-10.087 GHz input frequency range. The phase noise sensitivity improves to -119.9/-123.4 dBc/Hz at 1 MHz offset with the 40/80 ns DL, respectively. The integrated jitter from 10 kHz to 100 MHz is 176/111/85.5 fs with the 20/40/80 ns DL. The PNF is fabricated in a 65 nm CMOS process with the chip area of 1.68 mm × 1.5 mm and power consumption of 102 mW. Second, two time-amplifier (TA) enhanced PNFs are further proposed. By adding the low noise TA in front of the PD and CP, the major noise contribution from PD/CP is greatly reduced. The first version TAPNF demonstrates -126 dBc/Hz phase noise sensitivity at 1 MHz, which is 10 dB better than the one without using TA. The second version TAPNF even achieves -133 dBc/Hz sensitivity thanks to the inverter-type TA, which decouples the phase noise and timing amplification gain for better optimized performance. In addition, the power consumption is also reduced to 50 mW by optimizing the buffer interface before and after the delay line. To author’s best knowledge, the inverter-type TAPNF’s achieved -248.7 dB FOM is the best compared to the state-of-arts with similar technologies and carrier frequencies. Moreover, when applying the PNF in array systems, the phase noise sensitivity is theoretically improved by 10×log(N) due to the uncorrelated feature among the PNF element noise, where N is the array element number. The measured phase noise sensitivity of 2-element/4-element PNF array is improved to -118/-120 dBc/Hz, respectively, from the single PNF’s -116 dBc/Hz at 1 MHz offset. The improvement is 2-3 dB per octave array element number, which agrees with the theoretical analysis. The phase noise suppression and input frequency range are similar to the single PNF case.
Download or read book The Tracking Performance of Sampled Data Delay Lock Loops with Pulsed Envelope Input Signals written by Kenneth A. Wallace and published by . This book was released on 1968 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: A sampled-data delay-lock loop for tracking the arrival time of a pulsed-envelope signal is modeled as a sampled-data control system. Models for two specific loop configurations are developed in detail. One, the 'analog' loop, utilizes a RC filter and voltage controlled oscillator in the loop implementation while the other, the 'digital' loop, uses a discrete filter and a gated fixed-frequency oscillator. These models are considered in a time division multiple access satellite communication application and the relation between system performance and loop parameters is derived in each case. System performance is measured by the rms timing jitter due to noise, the settling time to a step input of signal delay, and the steady-state tracking error to ramp inputs of signal delay. An example is presented to demonstrate how the derived relations can be used to specify loop parameters to yield a given desired performance. The relative merits of the two configurations are discussed. (Author).
