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Book High speed Baud rate Clock Recovery

Download or read book High speed Baud rate Clock Recovery written by Faisal Ahmed Musa and published by . This book was released on 2008 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Baud-rate clock recovery (CR) is gradually gaining popularity in modern serial data transmission systems since these CR techniques do not require edge-samples for extracting timing information. However, previous baud-rate techniques for high-speed serial links either rely on specific 4-bit patterns or uncorrelated random data. This work describes the modeling and design of analog filter front-end aided baud-rate CR schemes. Unlike other baud-rate schemes, this technique is not constrained by the properties of the input random data.Firstly, the thesis develops a hardware-efficient baud-rate algorithm that requires only the slope information of the incoming random data. Called modified sign-sign minimum mean squared error (SSMMSE), this algorithm adjusts the clock sampling phase until the slope is zero through a bang-bang control loop. Secondly, the performance of a modified SSMMSE phase detector is investigated and compared with a conventional edge-sampled phase detector. It is shown that, at severe noise levels, the proposed modified SSMMSE method has better performance compared to the edge-sampled method for equal loop bandwidths. Thirdly, the thesis investigates different hardware-efficient slope detection techniques. Both passive and active filter based slope detection techniques are demonstrated in this work. In addition to slope generation, the active filter performs linear equalization as well. However, the passive filter generates the slope information at higher speeds than the active filter and also consumes less power. The two filters are used to recover a 2-GHz clock by using an external bang-bang loop. In short, the thesis demonstrates that area and power savings can be achieved by utilizing slope information from front-end filters without compromising the performance of the CR unit.

Book High Speed Clock and Data Recovery Analysis

Download or read book High Speed Clock and Data Recovery Analysis written by Abishek Namachivayam and published by . This book was released on 2020 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Baud rate clock and data recovery circuits are critical to high speed serial links since these require only one sample per data period thereby requiring low speed samplers and comparators. This work models and discusses the backend of one particular Baud rate CDR – Mueller Muller, and analyses some of the building blocks of the CDR – Phase Detector, Phase Interpolator and the Quadrature Phase Generator. Firstly, a PAM-4 Quadrature Phase Detector operating at 80Gb/s is discussed. The challenges associated with designing a Mueller-Muller PD for an asymmetric channel are discussed and one way to resolve this issue is proposed. Then the underlying digital blocks that make up the Phase detector are expanded upon. Secondly, a 64-step digitally controlled Phase Interpolator running at 16GHz clock rate is analyzed and its design challenges with regards to achieving linearity and ensuring duty cycle fidelity are explored. Finally, a Quadrature Phase Generator with digital delay control is analyzed. It is modeled at 16GHz clock rate and the range/resolution problem and its impact on clock jitter is explored.

Book High speed Baud rate Clock Recovery

Download or read book High speed Baud rate Clock Recovery written by FAISAL. MUSA and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Design of Clock Data Recovery Integrated Circuit for High Speed Data Communication Systems

Download or read book Design of Clock Data Recovery Integrated Circuit for High Speed Data Communication Systems written by Jinghua Li and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand for low cost Serializer and De-serializer (SerDes) integrated circuits has increased due to the widespread use of Synchronous Optical Network (SONET)/Gigabit Ethernet network and chip-to-chip interfaces such as PCI-Express (PCIe), Serial ATA(SATA) and Fibre channel standard applications. Among all these applications, clock data recovery (CDR) is one of the key design components. With the increasing demand for higher bandwidth and high integration. Complementary metal-oxidesemiconductor (CMOS) implementation is now a design trend for the predominant products in this research work, a fully integrated 10Gb/s (OC-192) CDR architecture in standard 0.18 um CMOS is developed. The proposed architecture integrates the typically large off-chip filter capacitor by using two feed-forward paths configuration to generate the required zero and poles and satisfies SONET jitter requirements with a total power dissipation (including the buffers) of 290mW. The chip exceeds SONET OC-192 jitter tolerance mask, and high frequency jitter tolerance is over 0.31 UIpp by applying PRBS data with a pattern length of 231-1. The implementation is the first fully integrated 10Gb/s CDR IC which meets/exceeds the SONET standard in the literature. The second proposed CDR architecture includes an adaptive bang-bang control algorithm. For 6MHz sinusoidal jitter modulation, the new architecture reduces the tracking error to 11.4ps peak-to-peak, versus that of 19.7ps of the conventional bangbang CDR. The main contribution of the proposed architecture is that it optimizes the loop dynamics by adjusting the bang-bang bandwidth adaptively to minimize the steady state jitter of the CDR, which leads to an improved jitter tolerance performance. According to simulation, the jitter performance is improved by more than 0.04UI, which alleviates the stringent 0.1UI peak to peak jitter requirements in the PCIe/Fibre channel/Sonet Standard.

Book Clock data Recovery Circuits Using Wide range Baud rate FD and BLGC

Download or read book Clock data Recovery Circuits Using Wide range Baud rate FD and BLGC written by 姚允升 and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book High Speed Baud Rate Clock and Data Recovery

Download or read book High Speed Baud Rate Clock and Data Recovery written by Danny Yoo and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents an adaptive baud-rate CDR with CTLE and 1-tap DFE. The novelty in this design is the adaptation engine tailored for baud-rate clock and data recovery where the comparators for the DFE and the PD are shared to save power. A testchip was fabricated in TSMC 28nm CMOS. The adaptation engine is demonstrated for 34-36Gb/s operation with a Tyco 5" channel resulting in 15.05-18.25dB channel losses. At 35Gb/s, the total power consumption is measured to be 106.3mW or a FOM of 3.04pJ/bit. This thesis also presents a 2x half-baud-rate clock and data recovery technique with 2x oversampling at half-baud-rate (every other UI). A testchip was also fabricated in TSMC 28nm CMOS. A 30Gb/s 2x half-baud-rate CDR was tested with a Tyco 5" channel with 13.06dB of loss. The total power consumption is measured to be 79.2mW or a FOM of 2.64pJ/bit.

Book Monolithic Phase Locked Loops and Clock Recovery Circuits

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.

Book Design for Clock and Data Recovery Circuits and Quick Estimation for Jitter Tolerance

Download or read book Design for Clock and Data Recovery Circuits and Quick Estimation for Jitter Tolerance written by 李彥龍 and published by . This book was released on 2017 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Low jitter Clock and Data Recovery Circuit with Wide linear range Frequency Detector

Download or read book Low jitter Clock and Data Recovery Circuit with Wide linear range Frequency Detector written by 李明華 and published by . This book was released on 2007 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A 10Gb s Full On chip Bang bang Clock and Data Recovery System Using an Adaptive Loop Bandwidth Strategy

Download or read book A 10Gb s Full On chip Bang bang Clock and Data Recovery System Using an Adaptive Loop Bandwidth Strategy written by Hyung-Joon Jeon and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: As demand for higher bandwidth I/O grows, the front end design of serial link becomes significant to overcome stringent timing requirements on noisy and bandwidthlimited channels. As a clock reconstructing module in a receiver, the recovered clock quality of Clock and Data Recovery is the main issue of the receiver performance. However, from unknown incoming jitter, it is difficult to optimize loop dynamics to minimize steady-state and dynamic jitter. In this thesis a 10 Gb/s adaptive loop bandwidth clock and data recovery circuit with on-chip loop filter is presented. The proposed system optimizes the loop bandwidth adaptively to minimize jitter so that it leads to an improved jitter tolerance performance. This architecture tunes the loop bandwidth by a factor of eight based on the phase information of incoming data. The resulting architecture performs as good as a maximum fixed loop bandwidth CDR while tracking high speed input jitter and as good as a minimum fixed bandwidth CDR while suppressing wide bandwidth steady-state jitter. By employing a mixed mode predictor, high updating rate loop bandwidth adaptation is achieved with low power consumption. Another relevant feature is that it integrates a typically large off-chip filter using a capacitance multiplication technique that employs dual charge pumps. The functionality of the proposed architecture has been verified through schematic and behavioral model simulations. In the simulation, the performance of jitter tolerance is confirmed that the proposed solution provides improved results and robustness to the variation of jitter profile. Its applicability to industrial standards is also verified by the jitter tolerance passing SONET OC-192 successfully.

Book Low Power Clock and Data Recovery Integrated Circuits

Download or read book Low Power Clock and Data Recovery Integrated Circuits written by Shahab Ardalan and published by . This book was released on 2007 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in technology and the introduction of high speed processors have increased the demand for fast, compact and commercial methods for transferring large amounts of data. The next generation of the communication access network will use optical fiber as a media for data transmission to the subscriber. In optical data or chip-to-chip data communication, the continuous received data needs to be converted to discrete data. For the conversion, a synchronous clock and data are required. A clock and data recovery (CDR) circuit recovers the phase information from the data and generates the in-phase clock and data. In this dissertation, two clock and data recovery circuits for Giga-bits per second (Gbps) serial data communication are designed and fabricated in 180nm and 90nm CMOS technology. The primary objective was to reduce the circuit power dissipation for multi-channel data communication applications. The power saving is achieved using low swing voltage signaling scheme. Furthermore, a novel low input swing Alexander phase detector is introduced. The proposed phase detector reduces the power consumption at the transmitter and receiver blocks. The circuit demonstrates a low power dissipation of 340[mu]W/Gbps in 90nm CMOS technology. The CDR is able to recover the input signal swing of 35mVp. The peak-to-peak jitter is 21ps and RMS jitter is 2.5ps. Total core area excluding pads is approximately 0.01mm2.

Book Reference less Linear Sub baud rate Clock and Data Recovery Circuit

Download or read book Reference less Linear Sub baud rate Clock and Data Recovery Circuit written by 鄒墨 and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: