Jitter period is the interval between two times of maximum effect or minimum effect of a signal characteristic that varies regularly with time. This paper describes how these key channel effects impact the jitter performance and. Jitter noise and signal integrity at high speed issuu. Jitter noise and signal integrity at high speed by mike peng li free ebook download as pdf file. Examples include serdes for highspeed io signal transmission as well as generalized differential measurements found in highspeed interfaces such as usb 3. Jitter, noise, and signal integrity at highspeed a tutorialpart i. Jitter caused by external factors such as thermal noise. The graph is shown below for the fractional oversampling how to reduce the timing jitter. Why skewmatched coaxial cables matter to signalintegrity. Jitter, noise, and signal integrity at high speed isbn. Reducing the jitter noise power by oversampling in high speed ofdm system. Analysis of a spread spectrum clock signal, showing the 39 khz triangular modulation on the 98 mhz clock. Jitter is fluctuation in the timeaxis direction of a digital signal. Jitter, noise, and signal integrity at highspeed book.
Written by the foremost experts on the subject, it leverages concepts and techniques from nonrelated fields such as. To examine the lowfrequency jitter components, the spectrum can be zoomed and measured with cursors. Jitter, noise, and signal integrity at highspeed by mike. This can be achieved by following some simple analog design rules and using careful pcb layout techniques. Jitter, noise, and signal integrity at highspeed paperback. Speed noise and grounding seminar signal integrity.
Eye diagram and its relationship to jitter pdfs and noise pdfs. A sinusoid signal of a clock signal with phase noise can be written as. Source, mechanism, and math model for jitter and noise 75 chapter 4. Highspeed digital design overview signal integrity. A guide to making rf measurements for signal integrity. Stefan erb submitted as thesis to attain the academic degree dr.
Signal integrity generally is defined as any deviation from ideal waveform. Source, mechanism, and math model for jitter and noise 75. As a digital signal becomes attenuated and approaches noise level, the trigger point becomes unstable. Over short distances and at low bit rates, a simple conductor can transmit. The challenges of highspeed design require some additional effort to ensure signal integrity. However, certain signal integrity signatures such as overshoot, undershoot, and ringing see figure 1. Figure 31 shows an ideal signal and a signal that has jitter with a. In a cycle less than 10 hz, this fluctuation is called wander, while fluctuation above 10 hz is called jitter. Traditionally, sampling oscilloscope is the tool of choice for viewing and measuring optical signals. Advanced signal integrity for highspeed digital designs. 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. Mike peng li, jitter, noise and signal integrity at high.
Mathcad modelling scripts includes appendix c coded for mathcad v. Download the ppt file to see teacherspresenters notes i. Jitter and noise separation and analysis in statistical domain 1. High speed circuit board signal integrity download ebook. Pdf jitter, noise, and signal integrity at highspeed semantic. Jitter, noise, and signal integrity at highspeed isbn. Welldesigned systems have sufficient noise margins, called signal to noise ratio. The circuit transmits the clock signal to the gate driver where it clocks a.
Jitter noise and signal integrity at high speed by mike peng li. Appreciable noise on the clock will manifest itself as jitter. It also discusses the joint pdfs, with both jitter and noise. Realtime oscilloscopes are preferred for ample debugtroubleshooting and to capture intermittent.
Power integrity analysis for jitter characterization. Jitter, noise, ber jnb, and interrelationships 109 chapter 5. Edn jitter, noise, and signal integrity at highspeed. The higher the ratio, the better the system immunity to noise. Jitter, noise and eyediagram analysis solution tektronix. An analysis of power supply induced jitter for a voltage mode driver in high speed serial links. In jitter, noise, and signal integrity at highspeed, dr. Signal integrity analysis of 28 gbits highspeed digital signal. New systemlevel techniques for optimizing signalpower integrity in highspeed interfacesfrom pioneering innovators at rambus, stanford, berkeley, and mit as data communication rates. Li provides powerful new tools for solving these problemsquickly. Introduction reproduced by permission of pearson education, inc.
The terms noise and jitter can mistakenly be confused, even more so as data rates and signal amplitudes have changed over time. Li provides powerful new tools for solving these problemsquickly, efficiently, and reliably. Highspeed links which employ source synchronous clocking architectures have the ability to track correlated jitter between clock and data channels up to high frequencies. Preface xv acknowledgements xxi about the author xxiii chapter 1. Written by the foremost experts on the subject, it leverages concepts and techniques from nonrelated fields such as applied physics. Download pdf highspeeddigitaldesign free online new. Reducing the jitter noise power by oversampling in high. The resulting waveform resembles an eye, hence the name eye diagram. Statistical signal and linear theory for jitter, noise, and signal integrity 27. With todays highspeed serial buses, there is often significant energy at the 5th. Consequently, the jitter on the lowspeed signal can be measured easily using conventional jitter measurement techniques and mapped back to its corresponding value relative to.
Jitter analysis methods for the design and test of highspeed serial. 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. Please select some articleschapters to export citations. Altera highspeed programmable logic devices provide features to help support highspeed design.
This property makes the jitter analysis of a clock signal much easier. Prediction and measurement of supply noise induced jitter. Pdf an analysis of power supply induced jitter for a. Jitter analysis methods for the design and test of highspeed serial links distribution tail fitting based on gaussian quantile normalization dipl. The predicted supply noise induced jitter is shown to correlate well with the measurement data for a high speed io interface operating at 6. It provides many benefits in measuring optical signals with low noisejitter and various measurement features optimized to characterize the optical signals. 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. Jitter, noise, and signal integrity at highspeed no part of any chapter or book may be reproduced or transmitted in. It is so called because, for several types of coding, the pattern looks like a series of eyes between a pair of rails. 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. Appendix c includes all the equations from the back of the book, with examples.
Jitter noise and signal integrity at high speed by mike. 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. Jitter frequency, the more commonly quoted figure, is its inverse. Authors biography hai lan is a senior member of technical staff at rambus inc. Noise, and signal integrity at highspeed, prentice hall, 2007. Receiver jitter tracking characteristics in highspeed.
With an unbounded pattern, it typically follows a gaussian distribution. Introduction to signal integrity for students and young engineers by abhijit mahajan. In digital electronics, a stream of binary values is represented by a voltage or current waveform. Jitter, noise, ber jnb, and interrelationships 109. 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. Statistical signal and linear theory for jitter, noise, and signal integrity 27 chapter 3. Eye diagram with timing jitter and amplitude noise pdfs. Reproduced by permission of pearson education, inc.
Jitter, noise, and signal integrity at highspeed mike. As a common transmission line, the microstrip line plays an important role in highspeed circuits. Onchip jitterspectrumanalyzer for highspeed digital. It then discusses the noise total pdf and its relationship with the pdfs of its component. 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. A synergistic approach to signal integrity for highspeed digital design.
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