It also discusses the joint pdfs, with both jitter and noise. This property makes the jitter analysis of a clock signal much easier. Highspeed links which employ source synchronous clocking architectures have the ability to track correlated jitter between clock and data channels up to high frequencies. As a common transmission line, the microstrip line plays an important role in highspeed circuits. Stefan erb submitted as thesis to attain the academic degree dr. With todays highspeed serial buses, there is often significant energy at the 5th. Jitter, noise, and signal integrity at highspeed isbn. Declaration of originality i, linson thomas, roll number 214ec2185 hereby declare that this thesis entitled power integrity analysis for jitter characterization presents my original work. Written by the foremost experts on the subject, it leverages concepts and techniques from nonrelated fields such as. Jitter analysis methods for the design and test of high. By using tools that help you rapidly characterize and discover sources of jitter and signal integrity concerns, you can bring new designs to market faster, with more confidence that they operate reliably in todays ultra highspeed environment. A guide to making rf measurements for signal integrity. Jitter is fluctuation in the timeaxis direction of a digital signal.
Jitter and noise separation and analysis in statistical domain 1. With an unbounded pattern, it typically follows a gaussian distribution. Pdf an analysis of power supply induced jitter for a. The graph is shown below for the fractional oversampling how to reduce the timing jitter. Jitter, noise, and signal integrity at highspeed paperback. In telecommunication, an eye pattern, also known as an eye diagram, is an oscilloscope display in which a digital signal from a receiver is repetitively sampled and applied to the vertical input, while the data rate is used to trigger the horizontal sweep. Pdf jitter, noise, and signal integrity at highspeed semantic. Appendix c includes all the equations from the back of the book, with examples. Jitter period is the interval between two times of maximum effect or minimum effect of a signal characteristic that varies regularly with time.
A synergistic approach to signal integrity for highspeed digital design. Prediction and measurement of supply noise induced jitter. However, digital signals are fundamentally analog in nature, and all signals are subject to effects such as noise, distortion, and loss. High speed circuit board signal integrity download ebook. In jitter, noise, and signal integrity at highspeed, dr. Reducing the jitter noise power by oversampling in high. This book is designed to provide contemporary readers with an understanding of the emerging highspeed signal integrity issues that are creating roadblocks in digital design. Introduction to jitter, noise, and signal integrity at. Jitter, noise, and signal integrity at highspeed book. Authors biography hai lan is a senior member of technical staff at rambus inc. Reducing the jitter noise power by oversampling in high speed ofdm system. Highspeed digital design overview signal integrity. Signal integrity analysis of 28 gbits highspeed digital signal. An analysis of power supply induced jitter for a voltage mode driver in high speed serial links.
A synergistic approach to signal integrity for highspeed digital design this book is designed to provide contemporary readers with an understanding of the emerging highspeed signal integrity issues that are creating roadblocks in digital design. Li provides powerful new tools for solving these problemsquickly, efficiently, and reliably. By default, the spectral plot shows the entire jitter content of the signal. Jitter, noise, and signal integrity at highspeed no part of any chapter or book may be reproduced or transmitted in any form by any means without the prior written. Welldesigned systems have sufficient noise margins, called signal to noise ratio. The pdf of the sum of 2 independent random variable is. Reproduced by permission of pearson education, inc. Jitter analysis methods for the design and test of highspeed serial links distribution tail fitting based on gaussian quantile normalization dipl. Mathcad modelling scripts includes appendix c coded for mathcad v. The higher the ratio, the better the system immunity to noise.
Receiver jitter tracking characteristics in highspeed. Source, mechanism, and math model for jitter and noise 75. Statistical signal and linear theory for jitter, noise, and signal integrity 27 chapter 3. Introduction to signal integrity for students and young engineers by abhijit mahajan. Eye diagram with timing jitter and amplitude noise pdfs. Onchip jitterspectrumanalyzer for highspeed digital.
It provides many benefits in measuring optical signals with low noisejitter and various measurement features optimized to characterize the optical signals. Download the ppt file to see teacherspresenters notes i. Power integrity analysis for jitter characterization. Relation between rms period jitter and phase noise using the fourier series expansion, it can be shown that a squarewave clock signal has the same jitter behavior as its base harmonic sinusoid signal. Li provides powerful new tools for solving these problemsquickly. However, system timing margins are degraded by channel skew between clock and data signals and highfrequency loss. Jitter, noise, and signal integrity at high speed isbn. Preface xv acknowledgements xxi about the author xxiii chapter 1. The terms noise and jitter can mistakenly be confused, even more so as data rates and signal amplitudes have changed over time. Altera highspeed programmable logic devices provide features to help support highspeed design. Introduction reproduced by permission of pearson education, inc. This can be achieved by following some simple analog design rules and using careful pcb layout techniques.
Jitter, noise and eyediagram analysis solution tektronix. To examine the lowfrequency jitter components, the spectrum can be zoomed and measured with cursors. Noise, and signal integrity at highspeed, prentice hall, 2007. Appreciable noise on the clock will manifest itself as jitter. Figure 31 shows an ideal signal and a signal that has jitter with a. Advanced signal integrity for highspeed digital designs.
The challenges of highspeed design require some additional effort to ensure signal integrity. Jitter, noise, and signal integrity at highspeed mike. Jitter noise and signal integrity at high speed by mike peng li. Jitter, noise, ber jnb, and interrelationships 109 chapter 5. The variance of the noise due to jitter as a function of received subcarrier index when bandedge subcarriers are unused. It is so called because, for several types of coding, the pattern looks like a series of eyes between a pair of rails. In a cycle less than 10 hz, this fluctuation is called wander, while fluctuation above 10 hz is called jitter. Jitter, noise, ber jnb, and interrelationships 109. Jitter analysis methods for the design and test of highspeed serial. Realtime oscilloscopes are preferred for ample debugtroubleshooting and to capture intermittent. Understanding signal integrity terms and measurements eye diagrams an eye diagram is the result of superimposing the 1s, 0s and corresponding transitions of a high speed digital signal onto a single amplitude, versus time display. A sinusoid signal of a clock signal with phase noise can be written as.
Speed noise and grounding seminar signal integrity. Jitter frequency, the more commonly quoted figure, is its inverse. The predicted supply noise induced jitter is shown to correlate well with the measurement data for a high speed io interface operating at 6. This paper describes how these key channel effects impact the jitter performance and. The circuit transmits the clock signal to the gate driver where it clocks a. Jitter caused by external factors such as thermal noise.
Examples include serdes for highspeed io signal transmission as well as generalized differential measurements found in highspeed interfaces such as usb 3. Edn jitter, noise, and signal integrity at highspeed. Eye diagram and its relationship to jitter pdfs and noise pdfs. It then discusses the noise total pdf and its relationship with the pdfs of its component. The resulting waveform resembles an eye, hence the name eye diagram. Statistical signal and linear theory for jitter, noise, and signal integrity 27. Signal integrity engineering for highspeed links christian schuster. Cadence sigrity systemsi signal integrity solutions datasheet. Jitter noise and signal integrity at high speed by mike. Over short distances and at low bit rates, a simple conductor can transmit. New systemlevel techniques for optimizing signalpower integrity in highspeed interfacesfrom pioneering innovators at rambus, stanford, berkeley, and mit as data communication rates. In digital electronics, a stream of binary values is represented by a voltage or current waveform. However, certain signal integrity signatures such as overshoot, undershoot, and ringing see figure 1.
Jitter, noise, and signal integrity at highspeed a tutorialpart i. Jitter, noise, and signal integrity at highspeed by mike. Signal integrity generally is defined as any deviation from ideal waveform. Source, mechanism, and math model for jitter and noise 75 chapter 4. Jitter, noise, and signal integrity at highspeed no part of any chapter or book may be reproduced or transmitted in.
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