Highspeed links circuits and systems spring 2019 lecture 12. Due to this analog nature of serdes based interfaces, it is not possible to specify the interface in a traditional dsp digital interface manner. The serdes from two adjacent blocks m aster and slave can be cascaded to make an 8bit block. Adi switches and multiplexers are used in a wide and growing range of applications. Analog devices offers a comprehensive portfolio of switches and multiplexers covering single to multiple switch elements with various signal ranges in a variety of packages to best suit customer application needs. Introduction although this application note tries to minimize math, some. The serdes is primarily a mixedsignal circuit with several analog as well as digital blocks to perform di erent functions see figure 2. The ad9578 is a programmable synthesizer intended for jitter attenuation and asynchronous clocking applications in high performance telecommunications, networking, data storage, serializerdeserializer serdes, and physical layer phy applications. Serializerdeserializer serdes ip analog circuits that. The cdr circuitry creates a clock signal that is aligned to the phase and to some extent the frequency of the transmitted signal. This simple con guration represents, in a general way, a very broad range of analog electronics. Taking care of overall circuits design, simulations, layout.
It is intended for students pursuing courses in electrical, electronics, computer, and related engineering disciplines. A regulator design for a serdes phy of a high speed serial data interface. Use circuit level verification to build better models for cp. Adi switches and multiplexers are used in a wide and growing range of applications from industrial and instrumentation to medical, consu.
Vlsi circuits and systems letter ieee computer society. Several architecture choices, analog circuits, and techniques to mitigate undesired device characteristic in 16nm finfet are discussed in this. Serdes tackling the challenges of highperformance low. Data recovery relies on a locally regenerated clock and proper sampling. Serdes link with a new self timed signaling technique along differential transmission line or using resistive te rminated single ended transmission line 89. Layout design of advanced serdes and other analog and mixed signal macros in deep submicron finfet technologies.
System level optimization for highspeed serdes mdpi. Cadence multilink phy ip serdes, analog frontend, and. Major blocks of a typical serdes o highpower blocks are tx driver, rx ffedfe, pllclock buffers, ctle. Pdf design of analogtype highspeed serdes using digital. Your project will be the design of a circuit that processes the. Creating broadband analog models for serdes applications.
Bushnell a new jitter reduction technique is proposed for reducing the timing jitter in a serializerdeserializer serdes circuit. A serdes is used in a variety of applications and technologies, where its primary purpose is to provide data transmission over a single or differential line by. Analyst, owner ipnest this white paper describes the new challenges going with the introduction of new finfet based technologies and the emergence of a business gap. The design presents a variation tolerant driving technique for all digital self timed three levels signaling whereas design uses two level manchester encoding using resistive ter. Serdes transceiver is used in serial link transmission, where serializer collects. Lvds serdes transmitter receiver ip cores user guide. Pdf high speed clock and data recovery for serdes applications. The analog fastspice afs platform is the worlds fastest nanometer circuit verification platform for analog, rf, mixedsignal, and custom digital circuits. An analog receiver module for a serdes with a data rate of 2. The tutorial coverage also makes it suitable for use in an advanced design.
Analog circuit design highspeed clock and data recovery, high. Understanding basic analog circuit equations by ron mancini abstract this application report provides a basic understanding of analog circuit equations. Generators are parameterized design procedures that produce sized schematics and correct layouts optimized to meet a set of input specifications. What you do at amd changes everything at amd, we push the boundaries of what is possible. Apply to 473 verilog a modeling of serdes analog blocks jobs on, indias no. Take rambuss version, for example figure 1, showing both transmit serializer and receive deserializer sections. In this paper we look at a highspeed serdes channel with an optical interconnect. Can be located anywhere on the soc select click for information below to learn more about our halfpower. The 112gigabitpersecond gbps analog todigital converter adcbased longreach lr serdes phy is the top contender to boost greater performance with acceptable power and area. Principal analog mixed signal ic design engineer, serdes. Linear circuit design handbook, 2008 education analog. Serdes implementation guidelines for keystone devices.
Each spartan6 fpga inputoutput block iob contains a 4bit input serdes and a 4bit output serdes. In 5, asynchronous wpcmos serdes is designed which consists of cascaded delay element and inverter chains to propagate serialized signal. High performance analog design, including the design of highperformance ios, is largely a manual process requiring a topquality layout editor, a very accurate extractor and circuit simulation that supports a wide variety of analyses. The 112gigabitpersecond gbps analogtodigital converter adcbased longreach lr serdes phy is the top contender to boost greater performance with acceptable power and area. Analog circuit and device interaction in highspeed serdes. In the rest of this section we focus on two major topics in serdes system design, equalization and. Prior to that, he worked on serdes characterization at texas instruments, dallas. The integrated circuit, fabricated in a 65nm bulk cmos technology, transmits preemphasized data through the use of a 4tap feedforward equalizer. They are similar to the original 10 and 16 bit bus lvds serdes products, but provide a wider, 18bit data bus payload to support. Godse this text offers a comprehensive introduction to a wide, relevant array of topics in analog electronics. Guide the recruiter to the conclusion that you are the best candidate for the circuit design engineer job. I was managing 20 members design team 8 member analog circuit designers, 6 members layout team and 3 members digital design team and 2 members ams verification team.
Serdes transceivers for highspeed serial communications. For more details on pcie interface, see the devicespecific data manual. Analog circuits within electrical equipment can convey information through changes in. A regulator design for a serdes phy of a high speed serial. An analog circuit is a circuit with a continuous, variable signal that is, an analogsignal, as opposed to a digital circuit where a signal must be one of two discrete levels. His current interests are serdes architecture development and simulation, analog and digital circuit implementation and optimization, and system level modeling. Our recordbreaking high speed data transceiver technology is world class, featuring excellent power consumption and area. A serializerdeserializer serdes pronounced sirdeez or sirdez is a pair of functional blocks commonly used in high speed communications to compensate for limited inputoutput. Several architecture choices, analog circuits, and techniques to mitigate undesired device characteristic in 16nm finfet are discussed in this paper. A serializerdeserializer serdes is an integrated circuit or device used in highspeed communications for converting between serial data and parallel interfaces in both directions. Supports multiple date rates with unlimited lane count. Dec 01, 2014 in this thesis, we present the berkeley analog generator bag framework, an integrated framework for the development of generators of ams circuits. The serial data bit stream is input to the transmitter. Pdpfd are strictly digital circuits in high speed serdes transceivers.
Analog and digital circuits integrated on the same chip. Analog circuits within electrical equipment can convey information through changes in the current, voltage, or frequency. The circuit uses a system clock and its phases to multiplex data. Serializerdeserializer serdes circuits by hari vijay venkatanarayanan dissertation director.
Each part discusses a specific todate topic on new and valuable design ideas in the area of analog circuit design. Diodes and diode circuits tlt8016 basic analog circuits 20052006 6 exercise 3. The purpose of this paper is to detail our investigation of issues involved in clock and data recovery associated with a high speed serializerdeserializer serdes receiver block. Circuit design engineer resume samples velvet jobs. Analog bits proprietary and industry leading pll technology, in combination with sophisticated circuit techniques and innovative io design, makes this macro an extremely area and power efficient solution, and ideal for use in consumer cable applications. A 28 gbs 560 mw multistandard serdes with singlestage analog. Analog circuit design contains the contribution of 18 tutorials of the 17th workshop on. The multilevel phase detector incorporates a high speed array flash analog to digital. Amd hiring serdes staff analogmixedsignal design engineer. Murugesan r bengaluru, karnataka, india professional.
Conceptually, ads models this system internally with a tx ibis analog circuit, physical channel. Design of a new serializer and deserializer architecture. Circuit nonideality also adds to the challenges in advanced serdes. Each part is presented by six experts in that field and state of the art information is shared and overviewed. With the advancement of analog circuit design it is possible to build analog circuits within. Only sufficient math and physics are presented in this application report to enable understanding the concepts. Due to this analog nature of serdesbased interfaces, it is not possible to specify the interface in a.
True differential ibis model for serdes analog buffer shivani sharma, tushar malik, taranjit kukal ibis asia summit. Digital transition detection and decomposition circuit. The emphasis of tcvlsi falls on integrating the design, computeraided design. Design of pllbased clock and data recovery circuits for highspeed serdes links by ishita bisht thesis submitted in partial ful llment of the requirements for the degree of bachelor of science in electrical and computer engineering in the college of engineering of the university of illinois at urbanachampaign, 2014 urbana, illinois adviser. The table below lists two configurations with maximum data rates for several process nodes. A general serdes system the typical serdes system contains input data, serializer, transmitter tx, channel, receiver rx, deserializer and ouput data.
A retimer has a phase locked loop pll 7, may require an input reference clock, and is a mixedsignal analog digital device. But either it would need to be analog and have gain. Cadence multilink phy ip serdes, analog frontend, and ddr to design soc platform breaking the business gap on 1416ff by eric esteve phd. Circuit nonideality also adds to the challenges in advanced serdes designs, due to nonideal scaling of cmos technologies 11, increasing performance demand and shrinking the system footprint. This gives the possibility of serdes ratios from 2. A designeroriented framework for the development of ams. Serdes transceivers are predominantly mixed signal circuits. Analog mixed signal design engineer, serdes all levels the candidate will be a member of the serdes design team responsible for defining, specifying, and implementing future serdes ip. A serdes transmitter serves to transmit those parallel data to the receiver through a highspeed serial data link. If you have a transceiver in an fpga sending data over a cable and youve found the ideal preemphasis settings for say 25g and you change the code fpga so the transceiver now runs at 10g, do you need different preemphasis settings.
You hand the schematic to your layout person who puts all everything on a printed circuit board pcb. A tcoil is a special form of an inductive peaking circuit that will extend an amplifiers bandwidth and speed up the output signal risetime. Tailor your resume by picking relevant responsibilities from the examples below and then add your accomplishments. Sourceseries terminated serdes transmitter are presented. Verilog a modeling of serdes analog blocks jobs, 473. Jointly optimize equalizer and cdr for multigigabits serdes. These blocks convert data between serial data and parallel interfaces in each direction. As we know, the opamp has very large input impedance, so very little currentand, hence, very little poweris drawn from the input circuit. The circuit verification flow is further challenged by the need to account for the impact of device noise, process variation, and complex parasitics. Pdf analog circuits books collection free download. As a combined lti block it can be modeled with an equivalent single ended impulse waveform. Designcon 2015 serdes system design and simulation. 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.
This active inductor circuit has the capability to con trol output commonmode voltage to optimize circuit operating points. Serdes macro for consumer cable applications analog bits. Here is the download link is available to learn the pdf of this subject. High speed digital hsd integrated circuits ics are used in serializerdeserializer serdes systems. True differential ibis model for serdes analog buffer. We believe in changing the world for the better by driving innovation in highperformance computing. You have spent several days, no maybe weeks, perfecting a design on paper and also using spice to ensure the design exceeds all expectations.
At receiver end, clock and data recovery circuit are used which consumes a lot of power. Measurement and simulation of a highspeed electrooptical. Anatomy of a 112gbps adcdsp longreach serdes phy eeweb. Proper printed circuit board pcb design for these interfaces. Serdes implementation o ers the advantage of low manufacturing cost and. Serializerdeserializer component design and test mcgill. Design of a new serializer and deserializer architecture for. Pcie, sas, sata, hmc, usb lowest latency for chiptochip communications. The term serdes generically refers to interfaces used in various technologies and applications. Half power serdes compared to competing alternatives. Highspeed analog serdes systems use clock and data recovery cdr circuitry to extract the proper time to correctly sample the incoming waveform. There are several circuit architectures and techniques that can be used to improve serdes energy efficiency, but in order to achieve the desired performance, jitter, and power specs, accurate circuit verification of the design is required. It is the perfect solution for a designer who needs analog. Analog bits hiring serdes and mixedsignal layoutmask.
Contains much of the material covered in data conversion handbook and op amp applications. Linear circuit design handbook, edited by hank zumbahlen, published by newneselsevier, 2008, isbn9780750687034 also published as basic linear design, analog devices, 2007, isbn0916550281. Design and verification of mixed signal and serdes systems. Transmitter output impedance is adjustable from 45 to 55 ohms. Fast and reliable serdes developments in nm technologies.
An analog type highspeed serializerdeserializer serdes has been designed for optical links especially between cpu and memory. More than 175 companies use the afs platform for their toughest circuit verification challenges, including highspeed ios, plls, adcsdacs, cmos image sensors, rfics, and embedded. Using ibisami in the modeling of advanced serdes equalization for serial link simulation cdnlive boston august 20 mark marlett and mahesh tirupattur, analog bits. Analog circuit design contains the contribution of 18 tutorials of the 14th workshop on advances in analog circuit design.
True differential ibis model for serdes analog buffer shivani sharma, tushar malik, taranjit kukal ibis asia summit taipei, taiwan nov. Pdf design and physical implementation of an analog receiver. Analog circuit design is an essential reference source for analog circuit designers and researchers wishing to keep abreast with the latest development in the field. Technical lead serdes, analog ips terminus circuits pvt ltd. Ownership of analog and digital circuits used in serdes phy, including evaluation of different circuit topologies for specific product requirements e. The transmitter consists of an equalizer eq and a linear analog backend that includes packaging effects. Process technology and device characteristic greatly impacts architecture, circuit topology, and design merit of a serdes.
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