A 20Gbaud/s PAM-4 65nm CMOS optical receiver using 3D solenoid based bandwidth enhancement

Stefano Facchin; Shiyu Zhou; Mark Power; Anil Jain; Carmelo Scarcella; Cleitus Antony; Paul Townsend; Peter Ossieur

doi:10.1109/MWSCAS.2017.8053025

A 20Gbaud/s PAM-4 65nm CMOS optical receiver using 3D solenoid based bandwidth enhancement

Stefano Facchin
, Shiyu Zhou
, Mark Power
, Anil Jain
, Carmelo Scarcella
, Cleitus Antony
, Paul Townsend
, Peter Ossieur

Research output: Chapter in Book/Report/Conference proceedings › Conference proceeding › peer-review

Abstract

This paper presents an optical receiver (RX) suitable for amplifying a high-speed PAM-4 signal. To achieve a high gain-bandwidth product at low power consumption, a triple inductively peaked regulated cascode (RGC) transimpedance amplifier is used. The inductors are implemented as small 3D solenoids to reduce chip area and optimized for minimum group delay variation. The receiver further includes a Cherry Hooper variable gain amplifier, a continuous time linear equalizer and a 50Ω differential buffer, and achieves a gain of 65 dBΩ at 14 GHz bandwidth. The chip was fabricated using a 65nm CMOS technology and integrated with an 80fF Germanium photodiode by a microbump flip-chip process onto a Silicon Photonic chip. The input referred noise current density is 23.4 pA/VHz. Clear eye diagrams up to 20Gbaud/s (40Gbit/s) have been measured. At this baud rate, the RX's power consumption is 80mW, corresponding to an energy efficiency of 2pJ/bit.

Original language	English
Title of host publication	2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	723-726
Number of pages	4
ISBN (Electronic)	9781509063895
DOIs	https://doi.org/10.1109/MWSCAS.2017.8053025
Publication status	Published - 27 Sep 2017
Event	60th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2017 - Boston, United States Duration: 6 Aug 2017 → 9 Aug 2017

Publication series

Name	Midwest Symposium on Circuits and Systems
Volume	2017-August
ISSN (Print)	1548-3746

Conference

Conference	60th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2017
Country/Territory	United States
City	Boston
Period	6/08/17 → 9/08/17

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

CMOS technology
Linear equalization
Optical interconnects
Optical receiver
PAM-4
Regulated cascode (RGC)
Silicon Photonics

Access to Document

10.1109/MWSCAS.2017.8053025

Cite this

Facchin, S., Zhou, S., Power, M., Jain, A., Scarcella, C., Antony, C., Townsend, P., & Ossieur, P. (2017). A 20Gbaud/s PAM-4 65nm CMOS optical receiver using 3D solenoid based bandwidth enhancement. In 2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017 (pp. 723-726). Article 8053025 (Midwest Symposium on Circuits and Systems; Vol. 2017-August). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSCAS.2017.8053025

@inproceedings{be1d0744f3d5474db868328db390363c,

title = "A 20Gbaud/s PAM-4 65nm CMOS optical receiver using 3D solenoid based bandwidth enhancement",

abstract = "This paper presents an optical receiver (RX) suitable for amplifying a high-speed PAM-4 signal. To achieve a high gain-bandwidth product at low power consumption, a triple inductively peaked regulated cascode (RGC) transimpedance amplifier is used. The inductors are implemented as small 3D solenoids to reduce chip area and optimized for minimum group delay variation. The receiver further includes a Cherry Hooper variable gain amplifier, a continuous time linear equalizer and a 50Ω differential buffer, and achieves a gain of 65 dBΩ at 14 GHz bandwidth. The chip was fabricated using a 65nm CMOS technology and integrated with an 80fF Germanium photodiode by a microbump flip-chip process onto a Silicon Photonic chip. The input referred noise current density is 23.4 pA/VHz. Clear eye diagrams up to 20Gbaud/s (40Gbit/s) have been measured. At this baud rate, the RX's power consumption is 80mW, corresponding to an energy efficiency of 2pJ/bit.",

keywords = "CMOS technology, Linear equalization, Optical interconnects, Optical receiver, PAM-4, Regulated cascode (RGC), Silicon Photonics",

author = "Stefano Facchin and Shiyu Zhou and Mark Power and Anil Jain and Carmelo Scarcella and Cleitus Antony and Paul Townsend and Peter Ossieur",

note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 60th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2017 ; Conference date: 06-08-2017 Through 09-08-2017",

year = "2017",

month = sep,

day = "27",

doi = "10.1109/MWSCAS.2017.8053025",

language = "English",

series = "Midwest Symposium on Circuits and Systems",

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Facchin, S, Zhou, S, Power, M, Jain, A, Scarcella, C, Antony, C , Townsend, P & Ossieur, P 2017, A 20Gbaud/s PAM-4 65nm CMOS optical receiver using 3D solenoid based bandwidth enhancement. in 2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017., 8053025, Midwest Symposium on Circuits and Systems, vol. 2017-August, Institute of Electrical and Electronics Engineers Inc., pp. 723-726, 60th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2017, Boston, United States, 6/08/17. https://doi.org/10.1109/MWSCAS.2017.8053025

A 20Gbaud/s PAM-4 65nm CMOS optical receiver using 3D solenoid based bandwidth enhancement. / Facchin, Stefano; Zhou, Shiyu; Power, Mark et al.
2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 723-726 8053025 (Midwest Symposium on Circuits and Systems; Vol. 2017-August).

Research output: Chapter in Book/Report/Conference proceedings › Conference proceeding › peer-review

TY - GEN

T1 - A 20Gbaud/s PAM-4 65nm CMOS optical receiver using 3D solenoid based bandwidth enhancement

AU - Facchin, Stefano

AU - Zhou, Shiyu

AU - Power, Mark

AU - Jain, Anil

AU - Scarcella, Carmelo

AU - Antony, Cleitus

AU - Townsend, Paul

AU - Ossieur, Peter

PY - 2017/9/27

Y1 - 2017/9/27

N2 - This paper presents an optical receiver (RX) suitable for amplifying a high-speed PAM-4 signal. To achieve a high gain-bandwidth product at low power consumption, a triple inductively peaked regulated cascode (RGC) transimpedance amplifier is used. The inductors are implemented as small 3D solenoids to reduce chip area and optimized for minimum group delay variation. The receiver further includes a Cherry Hooper variable gain amplifier, a continuous time linear equalizer and a 50Ω differential buffer, and achieves a gain of 65 dBΩ at 14 GHz bandwidth. The chip was fabricated using a 65nm CMOS technology and integrated with an 80fF Germanium photodiode by a microbump flip-chip process onto a Silicon Photonic chip. The input referred noise current density is 23.4 pA/VHz. Clear eye diagrams up to 20Gbaud/s (40Gbit/s) have been measured. At this baud rate, the RX's power consumption is 80mW, corresponding to an energy efficiency of 2pJ/bit.

AB - This paper presents an optical receiver (RX) suitable for amplifying a high-speed PAM-4 signal. To achieve a high gain-bandwidth product at low power consumption, a triple inductively peaked regulated cascode (RGC) transimpedance amplifier is used. The inductors are implemented as small 3D solenoids to reduce chip area and optimized for minimum group delay variation. The receiver further includes a Cherry Hooper variable gain amplifier, a continuous time linear equalizer and a 50Ω differential buffer, and achieves a gain of 65 dBΩ at 14 GHz bandwidth. The chip was fabricated using a 65nm CMOS technology and integrated with an 80fF Germanium photodiode by a microbump flip-chip process onto a Silicon Photonic chip. The input referred noise current density is 23.4 pA/VHz. Clear eye diagrams up to 20Gbaud/s (40Gbit/s) have been measured. At this baud rate, the RX's power consumption is 80mW, corresponding to an energy efficiency of 2pJ/bit.

KW - CMOS technology

KW - Linear equalization

KW - Optical interconnects

KW - Optical receiver

KW - PAM-4

KW - Regulated cascode (RGC)

KW - Silicon Photonics

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DO - 10.1109/MWSCAS.2017.8053025

M3 - Conference proceeding

AN - SCOPUS:85034105190

T3 - Midwest Symposium on Circuits and Systems

SP - 723

EP - 726

BT - 2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 60th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2017

Y2 - 6 August 2017 through 9 August 2017

ER -

Facchin S, Zhou S, Power M, Jain A, Scarcella C, Antony C et al. A 20Gbaud/s PAM-4 65nm CMOS optical receiver using 3D solenoid based bandwidth enhancement. In 2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017. Institute of Electrical and Electronics Engineers Inc. 2017. p. 723-726. 8053025. (Midwest Symposium on Circuits and Systems). doi: 10.1109/MWSCAS.2017.8053025

A 20Gbaud/s PAM-4 65nm CMOS optical receiver using 3D solenoid based bandwidth enhancement

Abstract

Publication series

Conference

UN SDGs

Keywords

Access to Document

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