Signal Integrity Engineer

We are bringing together the brightest minds to solve the toughest problems, in a place where everyone has the opportunity to make an impact on the company, our products and the future of artificial intelligence. Job Summary As a hardware signal integrity engineer you will develop, extract and simulate PCB structures to ensure that the high speed SERDES (112Gbps) and DDR interfaces perform correctly within the system budget. You will work closely with the PCB and package substrate CAD engineers to design component signal launches from BGA components and connectors, layer transition via structures, and cable interconnect.

You will define the low-loss materials to be used for future designs and work closely with Graphcore’s system architecture team and suppliers to ensure the best possible performance is achieved. You will be an expert user of high-speed PCB simulation tools and be familiar with industry best practice in high-speed digital system design. The Team Graphcore’s Hardware Engineering Team creates both products for sale in volume production and hardware test validation systems based on Graphcore’s IPU processor.

These systems allow Graphcore’s customers to develop leading-edge machine-leaning solutions for training and inference.

Responsibilities

and Duties Signal and Power Integrity specialist for the development of production systems and test boards for Graphcore’s family of processors.

Requirements

definition, tool vendor relationships PCB design requirement and constraint definition, PCB layout supervision Prototype bring-up, evaluation, validation system test Candidate Profile 5+ years’ experience in high-speed digital circuit development, with a deep understanding of signal and power supply integrity Knowledge of high-speed circuit design

to ensure signal integrity and robust rejection of interference and crosstalk is essential Experience of high frequency (tens of GHz) SERDES design and validation Experience with ANSYS SIWave, HFSS, and/or Mentor Hyperlynx Signal and Power Integrity tools High speed processor system design with experience in interfaces such as SERDES, PCI, DDR, Ethernet, etc. Design of BGA connector pad launches, via structures and transmission lines for GHz signals. This position will require extensive practical work in the lab, bringing up, debugging and validating designs Expertise in the use of vector network analysers, high speed digital oscilloscopes, signal generators A rigorous approach is required to make sure designs will work correctly the first time Independent working and the taking of responsibility, with excellent cooperative and communications skills to work in a small team environment Experience working in a small team, which requires a wide range of skills, an eagerness to participate in all parts of the development cycle from concept to testing in the lab and supporting manufacture and customers.

Benefits

In addition to a competitive salary, Graphcore offers flexible working, a generous annual leave policy, private medical insurance and health cash plan, a dental plan, pension (matched up to 5%), life assurance and income protection.