Christopher Madden
Senior Principal Engineer at Ayar Labs- Claim this Profile
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Bio
Experience
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Ayar Labs
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United States
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Computer Hardware Manufacturing
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1 - 100 Employee
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Senior Principal Engineer
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2020 - Present
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Rambus
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United States
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Semiconductors
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500 - 600 Employee
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Engineering Director
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2018 - 2019
IP Cores DivisionSignal Integrity Test and Analysis Lead on PAM-4 CEI-56G/112G-LR (400GAUI-8-LR/400GBASE-KR4) SERDES products.
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Technical Director
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2016 - 2018
Rambus LabsSERDES Tx/Rx AFE design and test for Cryogenic-memory front-side bus. Transferred AFE design and socket concept to customer for interface to superconducting processor. Signal Integrity and Power Integrity Lead on memory-controller testchip.
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Senior Principal Engineer
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2008 - 2016
Memory and Interfaces DivisionSignal Integrity Test Lead for Terabit Bandwidth Initiative (16-20Gb/s/pin memory PHY) and Rambus Mobile Memory Initiative (stacked die, 4x faster than LPDDR2 and 3 years before LPDDR3). Timing-jitter and proprietary-memory-system voltage-timing budgeting expert. Signal Integrity Lead on 10GBASE-KR / PCIe3 SERDES product, 100GBASE-KR4 / CEI-28G-MR product, PCIe4 product, and a 40Gb/s SERDES demonstrator. Power Integrity validation.
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Principal Engineer
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2004 - 2008
Memory and Interfaces DivisionSignal Integrity Test Lead for PlayStation3 project at Rambus. Characterization and Model Correlation on XDR Memory Subsystem, FlexIO CPU-GPU bus, and Southbridge. SI test and analysis of cost-reduction solutions.
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Senior Member Of Technical Staff
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2003 - 2004
Memory and Interfaces DivisionSignal Integrity test and analysis for NPI of XDR memory PHY.
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Consulting Member of Technical Staff
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2002 - 2002
Fiber-Optics R&DPerformance improvement and cost reduction on a 10Gb/s single-mode-fiber receiver. Fiber-Optics R&DPerformance improvement and cost reduction on a 10Gb/s single-mode-fiber receiver.
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Finisar Corporation
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Telecommunications
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700 & Above Employee
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Senior Development Engineer
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2001 - 2002
Optics DivisionLed 10Gb/s optical-receiver development for both PIN and APD-based products. Optics DivisionLed 10Gb/s optical-receiver development for both PIN and APD-based products.
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Tripath Technology
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Semiconductors
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1 - 100 Employee
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Principal Engineer/Scientist
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2000 - 2001
Fiber-Optics R&DModelling of 10Gb/s fiber-optic links in Matlab and LinkSim. Characterized ICs and optical devices. Managed the test lab. Fiber-Optics R&DModelling of 10Gb/s fiber-optic links in Matlab and LinkSim. Characterized ICs and optical devices. Managed the test lab.
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HP
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United States
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IT Services and IT Consulting
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700 & Above Employee
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Engineer/Scientist
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1998 - 2000
Product R&D, Fiber-Optic Communications DivisionGigabit Ethernet transceiver and OC-48 Parallel-optics module design and test.
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Member of Technical Staff
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1990 - 1998
HP Laboratories Division, Solid-State Technology Labmm-wave amplifier, mm-wave dynamic divider, and 50GHz optical receiver design and test. 5GHz and 60GHz ISM-band wireless LAN circuit design and test.
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Education
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Stanford University School of Engineering
BS, MS, and Ph.D., Electrical Engineering