Publication:

A 460 Gb/s PAM-4 Linear Distributed Driver with 105 GHz BW for TFLN Modulators in 130nm SiGe BiCMOS

Date

2026
Proceedings Paper
https://doi.org/10.1109/rfic70222.2026.11602309
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dc.contributor.authorda Silva, Leandro
dc.contributor.authorBruynsteen, Cedric
dc.contributor.authorDeclercq, Jakob
dc.contributor.authorOstrovskis, Armands
dc.contributor.authorPittala, Fabio
dc.contributor.authorTorfs, Guy
dc.contributor.authorSingh, Nishant
dc.contributor.authorYin, Xin
dc.date.accessioned2026-10-19T14:56:12Z
dc.date.available2026-10-19T14:56:12Z
dc.date.createdwos2026
dc.date.issued2026
dc.description.abstractWe present a linear single-ended distributed driver implemented in 130nm BiCMOS process with fT/fmax of 470/650 GHz, designed for single-ended push-pull thin-film lithium niobate (TFLN) traveling-wave Mach-Zehnder modulators (TW-MZMs). High-linearity and low group-delay variation are achieved by using 10 cascode gain cells with large emitter degeneration resistors (23.5Ω) and no capacitive peaking. The driver delivers an overall gain of 14.5 dB, a bandwidth of 105.7 GHz, and an output swing of 2.25 Vpp. Time domain experiments demonstrate 232 Gbaud PAM-4 (464 Gbps gross aggregate rate) with the use of offline DSP.
dc.description.wosFundingTextThis work is partially supported by EU-funded EQUO (grant nr. 101091561), Special Research Fund - UGent (grant nr. BOF20/GOA/027), and Horizon Europe PATTERN (grant nr. 101070506). The authors would like to thank Keysight Boblingen for providing access and assistance to the FDIU unit, especially Muhammad Umar Khan, Kazuo Yamaguchi Xavier Allart and Nicolas Forton for the coordination. Furthermore we thank imec ARF for supporting the 110 GHz VNA measurements, in particular Nele Van Hoovels and Luc Pauwels. CSEM provided TFLN PDK and fabrication. We would also like to thank Joris Lambrecht for the technical discussions and Jasper Jans for wirebonding.
dc.identifier.doi10.1109/rfic70222.2026.11602309
dc.identifier.isbn979-8-3195-1803-3
dc.identifier.isbn979-8-3195-1804-0
dc.identifier.issn1529-2517
dc.identifier.urihttps://imec-publications.be/handle/20.500.12860/60605
dc.language.isoeng
dc.provenance.editstepusergreet.vanhoof@imec.be
dc.publisherIEEE
dc.relation.ispartofseriesIEEE Radio Frequency Integrated Circuits Symposium
dc.source.beginpage311
dc.source.conferenceIEEE Radio Frequency Integrated Circuits Symposium - RFIC
dc.source.conferencedate2026
dc.source.conferencelocationSanta Fe, USA
dc.source.endpage314
dc.source.journal2026 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS SYMPOSIUM, RFIC
dc.source.numberofpages4
dc.title

A 460 Gb/s PAM-4 Linear Distributed Driver with 105 GHz BW for TFLN Modulators in 130nm SiGe BiCMOS

dc.typeProceedings paper
dspace.entity.typePublication
imec.internal.crawledAt2026-07-16
imec.internal.sourcecrawler
imec.internal.wosCreatedAt2026-10-11
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