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Imec Demonstrates A SiGe BiCMOS-based 100Gbaud Analog Time-Interleaver for Datacenters - imec in collaboration with Ghent University demonstrates for the first time a high-speed silicon analog time-interleaver achieving signalling rates up to 100 Gbaud (200Gb/s) at a power consumption of only 700mW using PAM-4 modulation - ISSCC.org
Imec Demonstrates A SiGe BiCMOS-based 100Gbaud Analog Time-Interleaver for Datacenters

 

NewswireToday - /newswire/ - Leuven, Belgium, 2020/02/17 - imec in collaboration with Ghent University demonstrates for the first time a high-speed silicon analog time-interleaver achieving signalling rates up to 100 Gbaud (200Gb/s) at a power consumption of only 700mW using PAM-4 modulation - ISSCC.org.

   
 
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This week, at the International Solid-State Circuits Conference (ISSCC2020) (isscc.org), imec, a world-leading research and innovation hub in nanoelectronics and digital technologies, in collaboration with Ghent University demonstrates for the first time a high-speed silicon analog time-interleaver achieving signalling rates up to 100 Gbaud (200Gb/s) at a power consumption of only 700mW using PAM-4 modulation. The demonstrated new architecture is a crucial building block for high-speed optical transceivers in future datacenters.

Over the next few years, datacenters will upgrade their networks to cope with the exploding demand for data consumption. A growing number of optical links interconnects the server racks through a hierarchical network of fiber optical cables. While these links need to be low cost and low power, they require an increase in signaling rate up to at least 100 Gbaud.

Optical transceivers with such high speeds only are achievable with state-of-the-art Indium phosphide (InP) based implementations, but this process comes with a high fabrication cost and a yield that might be too low for large-scale production. CMOS processes are more scalable, but achieve lower speeds due to a limited analog bandwidth. In particular, pushing the bandwidth of the digital-to-analog converter (DAC) beyond 50 GHz is challenging in a CMOS chip.

Scientists from IDLab, an imec research group at Ghent University, now managed to achieve a higher bandwidth using a 55nm SiGe BiCMOS technology. On the BiCMOS-chip, where the signal processing is performed, the outputs of four DACs are combined and by time-interleaving four 25 Gbaud streams a 100 Gbaud-signal is created. This is equivalent to a single DAC operating at 100 GS/s (giga-samples-per-second). By using the PAM-4 modulation format, a data rate of 200 Gb/s is obtained. Despite the significant increase in sampling rate, the total power consumption of the prototype stays low (700 mW), which is important given the problem of the rapidly increasing electricity consumption in data centers.

“Compared to other silicon implementations, this new circuit architecture combines a significant increase in baud rate with a lower power dissipation. In addition, the scalable SiGe BiCMOS technology can be implemented at high manufacturing volume, paving the way to cost-effective high-speed optical transceivers for the next-generation data center”, says Guy Torfs (UGent/ imec).

The analog time-interleaver will be demonstrated at the 2020 International Solid-State Circuits Conference. The research was supported by the European H2020 project ICT QAMeleon.

The project QAMeleon has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 780354.

About imec

Imec is a world-leading research and innovation hub in nanoelectronics and digital technologies. The combination of our widely acclaimed leadership in microchip technology and profound software and ICT expertise is what makes us unique. By leveraging our world-class infrastructure and local and global ecosystem of partners across a multitude of industries, we create groundbreaking innovation in application domains such as healthcare, smart cities and mobility, logistics and manufacturing, energy and education.

As a trusted partner for companies, start-ups and universities we bring together more than 4,000 brilliant minds from over 97 nationalities. Imec is headquartered in Leuven, Belgium and has distributed R&D groups at a number of Flemish universities, in the Netherlands, Taiwan, USA, and offices in China, India and Japan. In 2018, imec's revenue (P&L) totaled 583 million euro. Further information on imec can be found at imec-int.com.

Imec is a registered trademark for the activities of IMEC International (a legal entity set up under Belgian law as a "stichting van openbaar nut”), imec Belgium (IMEC vzw supported by the Government of Flanders), imec the Netherlands (Stichting IMEC Nederland, part of Holst Centre which is supported by the Dutch Government), imec Taiwan (IMEC Taiwan Co.), imec China (IMEC Microelectronics (Shanghai) Co. Ltd.), imec India (Imec India Private Limited) and imec Florida (IMEC USA nanoelectronics design center).

About ICT QAMeleon

ICT QAMeleon (ict-qameleon.eu) is a Research and Innovation Action (RIA) program, funded by the European Commission under the Horizon2020 framework targeting the topic ICT2017 Photonics KET 2017 and the initiative of the Photonics Public Private Partnership. The project has a duration of 4 years, from 01/01/2018 until 31/12/2021, comprising a consortium of 16 partners. QAMeleon aims to deliver a new generation of faster, cheaper, and greener photonic devices spanning from beyond state-of-the-art transponders to novel reconfigurable add drop multiplexers (ROADMs) towards scaling core and metro networks to the next decade.

About IDLab

IDLab (internet technologies and data science) (idlab.technology) is a core research group of imec and its research activities are embedded in Ghent University and University of Antwerp. Inside IDLab (about 350 people), the Design team (25 people) is currently one of the leading groups in the research and development of high-speed, low-power transmitter and receiver integrated circuits for next generation transport, metro, access, datacenter and radio-over-fiber networks with extensive experience on high-speed design in CMOS and SiGe BiCMOS for different optical devices.

 
 
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Imec Demonstrates A SiGe BiCMOS-based 100Gbaud Analog Time-Interleaver for Datacenters

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