High speed serdes design

Base specification and design guide for serdes highspeed. The 8b10b encoder and decoder are pure digital circuitry and operate only at one tenth of the serial data rate. In such systems, a lossy channel exists between the transmitter circuit and the receiver circuit and at high data rates the received data stream is severely distorted and. Igloo2 high speed serdes 3x oversampling design user guide revision 2 9 8. High speed serdes design was chosen as this dissertations project. Part 6 overview, networking devices use highspeed differential signaling that can exceed 10 gbps. Significant experience with high speed digital circuit e. They want to download and stream hd movies as fast as possible. You can see his introductory presentation here, where he address major trends in highspeed serdes.

In this paper, a complete digital cdr is designed, implemented and evaluated on spartan sp605 fpga with serdes circuits to support a highspeed data rate. But it will have a cost to develop this high performance infrastructure. Pdf high speed serial link design serdes introduction. His books are cmosttl digital systems design, bicmoscmos systems design, and signal and power integrity in digital systems all published by mcgraw hill. For a certain trace length, the signal needs a certain time to pass it. This book discusses the many aspects of highspeed serial designs. Serial data serdes link has been widely used in gigabit rate link, storage applications, telecom, data.

So, although the 8b10b encoder and decoder as well as the input and output fifos are usually included in standalone serdes devices. Our analogmixedsignal team develops cuttingedge technology for several highspeed serdes product lines. Serial data serdes link has been widely used in gigabit rate link, storage applications, telecom, data communications, etc. Design and implementation of cdr and serdes for high speed. Jan 11, 2016 david axelrad, product marketing manager, serdes ip, presents cadences position prior to the high speed io ip panel discussion at the gsa ip working group meeting on thursday, 22 october, 2015. You can thank data centers for continued advances in high speed serdes design. The impedance mismatch between vias and signal traces can cause transmissionline reflections. Multiple sensors, such as highresolution cameras, radar, lidar, etc. Encore semi is looking for experienced amsrf ic layout engineers to support highspeed serdes product development in finfet technologies. Finally, characteristics of typical design kit models to facilitate integration within the chip design are discussed. Eye analysis tool use after tool 2 multigigabit serdes system. High speed serial link design serdes introduction, architectures and applications. In order to achieve this task, one of our main problem was to set the limit of our design. Design of 56 gbs nrz and pam4 serdes transceivers in cmos.

A high speed serializerdeserializer design unh scholars. The challenges of designing with a high speed serdes has a general focus on clock distribution analog clock tree, power consumption, the type of packaging, and the parasitics. You might be used to designing a simple board where most of your focused time is on component placement and routing. Designing boards for automotive driverassist systems with serdes chipsets has prompted a number of myths and misconceptions. Serdes design techniques are paving the way for smaller, more mobile devices despite the increasing challenges designers face. System level optimization for highspeed serdes mdpi. The design uses serdes lane 1 which is looped ba ck from transmit to receive on the board. This thesis entails the fundamental concepts underlying the functioning of cdrs and presents a cadence virtuoso tutorial.

The ability to accurately predict serddes channel insertion loss and return loss plays a critical role in prediction of serdes link performance. What makes high speed design so unique is the amount of attention paid to these issues. These blocks convert data between serial data and parallel interfaces in each direction. The following section will look at why these signal degradations make it difficult for the receiver to interpret the information correctly, thereby. Our ultrahigh speed serdes is adopted by global major players to be used in. Highspeed layout guidelines for reducing emi for lvds serdes. High speed serdes design verification ieee conference publication.

A practical guide to signal integrity in highspeed serdes. Read this latest pcb design blog and learn how you can. This paper presents two ultrahighspeed serdes dedicated for pam4 and nrz data. The pam4 tx incorporates an output driver with 3tap ffe and adjustable weighting to deliver clean outputs at 4 levels, and the pam4 rx employs a purely linear fullrate cdr and ctle.

A serializerdeserializer serdes is a circuit that converts parallel data into a serial stream and vice versa. Design of 56 gbs nrz and pam4 serdes transceivers in cmos technologies abstract. It helps solve clockdata skew problems, simplifies data transmission, lowers the power consumption and reduces the chip cost. Design of lowcomplexity transceivers for such highspeed serdes faces many technical challenges. Design challenges with high speed serdes, the challenges are usually around power consumption, clock distribution analog clock tree, the type of package being used, and the parasitics, noted martin hujer, staff engineer at adesto. Design challenges with highspeed serdes, the challenges are usually around power consumption, clock distribution analog clock tree, the type of package being used, and the parasitics, noted martin hujer, staff engineer at adesto. However, due to its high speed and mixedsignal design nature, it is not an easy task to design a multigigabit serdes that can meet all the stringent performance requirements. Lvds pairs should be considered transmission lines.

Experience with cadence and mentor suite of design. New protocol standards, high data rates and bandwidth requirements make design and verification of serdes a very challenging task. In the datacenter market and in the enterprise market, its extremely important to. Deep experience in analyzing link jitter budget for high speed serial links and creating block level requirements. Highspeed serial io can be used to solve system interconnect design challenges. Design serdes systems and generate ibisami models for highspeed digital interconnects serdes toolbox provides a matlab and simulink model library and a set of analysis tools and apps for the design and verification of serializerdeserializer serdes systems. Serdes toolbox provides a matlab and simulink model library and a set of analysis tools and apps for the design and verification of serializerdeserializer serdes systems. Part 6 overview, networking devices use high speed differential signaling that can exceed 10 gbps. Synopsys provides a comprehensive portfolio of highspeed serdes phy ip with leading power, performance, and area to help designers meet their long and short reach connectivity requirements in up to 800g highperformance computing socs for hyperscale data center, networking, and ai applications. The goal of this research was to explore a more efficient structure in order to achieve a higher. Deep experience in analyzing link jitter budget for highspeed serial links and creating block level requirements. This function is used to convert the high speed processing into low speed processing, which reduces the cost of the overall system while achieves an acceptable performance for the data receiving.

High speed layout guidelines for reducing emi in lvds. Serdes plays a crucial role in multigigabit serial data communication links. Also, there is a focus on the pcb routing, fast digital logic, and support of test modes as well as test patterns. Unfortunately, it is not an easy task to design a multigigabit serdes due to the highspeed, mixedsignal circuitry involved and the stringent electrical. The future of highspeed serdes tensilica, design, and. Igloo2 high speed serdes 3x oversampling design user guide. Transimpedance amplifier tia design for high speed in. Aug 02, 2019 significant experience with high speed digital circuit e. Chip and system designers using hss devices must have detailed knowledge of both the features and functions of the hss device, and the applications in which they are used. Indeed, we could have designed very high end correction block that would give us very clean eyediagram. The serdes interface family includes a range of solutions to meet your speed and application needs. However, due to its highspeed and mixedsignal design nature, it is not an easy task to design a multigigabit serdes that can meet all the stringent performance requirements.

Tech scholar, department of ece, suresh gyanvihar university, jaipur, india1 assistant prof, department of ece, suresh gyanvihar university, jaipur, india 2 abstract. Apply to designer, engineer, fpga engineer and more. Contactproduct brief how the 32g phy works the rambus 32g mps phy is a comprehensive ip solution that is optimized for power and area. Highspeed layout guidelines for reducing emi for lvds. For a certain trace length, the signal needs a certain time to pass it, and this is called the propagation delay time. Higher speed clocks result in lower design latencies on the data path which is beneficial for communication speed over networks. Enabling integration success using highspeed serdes ip. The fundamentals of high speed serdes design pcb design. Highspeed layout guidelines for reducing emi for lvds serdes designs figure 3.

This need for speed directly drives serdes innovation. Highspeed serdes modeling for the pcb and system environment. The transceiver offerings cover the gamut of todays high speed protocols. High speed in nm technology for optical communication adarsh kumar sahu1, vipin gupta 2 m. With the serdes designer app, you can use statistical analysis to rapidly design wired communications transmitters and receivers. Addressing analog mixedsignal verification challenges of. Highspeed serdes play a critical role in moving data between compute and memory within datacenters and automobile systems. His specialities include pc board and system signal and power integrity issues, mixed signal pc board and backplane design, and gbit high speed serdes interconnection design. In this paper, a complete digital cdr is designed, implemented and evaluated on spartan sp605 fpga with serdes circuits to support a high speed data rate.

Circuit design for the transmitter tx and receiver rx elements in the high speed channel have capabilities of offset signal losses in the pcb and system. The demand for highspeed data throughput and high interconnection densities in high. Pcb trace stubs and discontinuities if possible, avoid routing highspeed frequency traces through the vias. David axelrad, product marketing manager, serdes ip, presents cadences position prior to the high speed io ip panel discussion at the gsa ip working group meeting on thursday, 22 october, 2015. High speed serdes design verification ieee conference. Each tool enables you to visualize the characteristics of the serdes block, subsystem or system in various ways, such as waveform vs. Anything over a few centime ters should have controlled impedance. This set of videos address serdes or serialize deserialize circuits like pci express, sata, xaui, etc.

A serializerdeserializer is a pair of functional blocks commonly used in high speed communications to compensate for limited inputoutput. Serdes system design and simulation tools, technologies and. The goal of this research was to explore a more efficient structure in order to achieve a higher data rate under current technology with satisfactory performance. Running up to 56gigabits per second gbps, our multiprotocol phys support server, storage, networking, graphics, and optical and communications applications. The third section covers specialized topics related to hss cores. Using high speed serdes data channels introduces several challenges to a products design process that must be overcome, including signal attenuation, reflection, impedance matching, and jitter. Highspeed serdes interfaces are the gateway for data traffic and analysis on the cloud. Jul 29, 2018 esilicons david axelrad talks with semiconductor engineering about the challenges with 56gbps and 112gps serdes, and why the switch from analog to digital is required for performance and low power. This paper presents a new approach for the systematic analysis of serdes channel compliance at 25gbps and above. Serdes system design and simulation tools, technologies. Our ultra high speed serdes is adopted by global major players to be used in.

High speed serdes devices and applications provides a broad understanding of high speed serdes hss device usage. Designing a highspeed, highperformance serializerdeserializer serdes for. High speed serdes design goes far beyond computer peripherals the challenges in high speed serdes design filter right down to the pcb level and are all about backplanedaughtercard design, transmission line layout, selecting proper equalization schemes, and much more. Traditional parallel communication not suitable for interic data transport in highspeed links. He is the author of numerous technical papers and three books on digital design.

In this paper, we explore a multiband architecture for a 25 gbps serdes, where the channel in each subband is approximately frequency flat, eliminating need of an equalizer in the receiver. But with a high speed design, it becomes more important to consider exactly where you are placing your traces, what width theyre going to. In such systems, a lossy channel exists between the transmitter circuit and the receiver circuit and at high data rates the received data stream is severely distorted and requires reconstruction equalization before use. High speed serdes devices and applications, stauffer, david. Such ios, when integrated into a highly programmable digital environment such as an fpga, allow you to create highperformance designs that were never possible before.

Serdes system design concerns transferring data through high bandwidth media, such as wireline or optical channels, at very high data rates. High speed serdes devices and applications, stauffer. Transimpedance amplifier tia design for high speed in nm technology for optical communication adarsh kumar sahu1, vipin gupta 2 m. The gth and gty transceivers provide the low jitter required for demanding optical interconnects and feature world class autoadaptive equalization with pcs features required for difficult backplane operation. A serializerdeserializer serdes pronounced sirdeez or sirdez is a pair of functional blocks commonly used in high speed communications to compensate for limited inputoutput. In this webinar we will explore key verification challenges associated with highspeed serdes design and showcase how mentor ams solutions are uniquely architected to address serdes verification needs. Dec 05, 2016 this set of videos address serdes or serialize deserialize circuits like pci express, sata, xaui, etc. Interface ip 32g multiprotocol serdes phy the 32g multiprotocol serdes mps phy is designed to meet the power efficiency and performance requirements of nextgeneration, highspeed wireline and wireless 5g infrastructure applications. High speed serdes devices and applications is a useful resource for chip designers using hss devices in their chip design. The challenges of designing with a highspeed serdes has a general focus on clock distribution analog clock tree, power consumption, the type of packaging, and the parasitics. Using a 100gbasekr4 electrical backplane design, the methodology reveals the systems sensitivity to various design variables, intelligently explores the design space, and provides a highlevel description of the automation involved in the analysis process. We are actively seeking talented analog and mixedsignal design engineers who want to join a dynamic and experienced team and take their technical knowledge to the next level. High speed digital hsd integrated circuits ics are used in serializerdeserializer serdes systems.

Optimization methods for highspeed serdes channels using. Tech scholar, department of ece, suresh gyanvihar university, jaipur, india1 assistant prof, department of ece, suresh gyanvihar university, jaipur, india 2. Design and implementation of cdr and serdes for high. Our analogmixedsignal team develops cuttingedge technology for several high speed serdes product lines. Bladeserver base specification serdes design 12 may 2010 ibmintel confidential 4 version 2. The material focuses on hss devices, and the consolidation of related topics into a single text. A high speed serializerdeserializer design semantic scholar. This function is used to convert the highspeed processing into lowspeed processing, which reduces the cost of the overall system while achieves an acceptable performance for the data receiving. Apply to designer, senior designer, design engineer and more. However, this creates a challenge for timing closure with a serdes design that can include a complex array of clock loopbacks and control blocks running at these transmit tx and receive rx clock speeds. The goal of this project was to solve the challenges in high speed serdes design, which included the low jitter design, wide bandwidth design and low power.