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A DC-90-GHz 4- V\mathrm{ pp} Modulator Driver in a 0.13- \mu \textm SiGe:C BiCMOS Process.

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Bibliographic Details
Title: A DC-90-GHz 4- V\mathrm{ pp} Modulator Driver in a 0.13- \mu \textm SiGe:C BiCMOS Process.
Authors: Rito, Pedro1, Garcia Lopez, Iria1, Awny, Ahmed1, Ko, Minsu1, Ulusoy, Ahmet Cagri2, Kissinger, Dietmar3
Source: IEEE Transactions on Microwave Theory & Techniques. Dec2017, Vol. 65 Issue 12 Part2, p5192-5202. 11p.
Subjects: Integrated circuits, Distributed amplifiers, Broadband amplifiers, BiCMOS memory circuits, Electronic modulators
Abstract: In this paper, a linear driver for optical modulators in a 0.13- \mu \textm SiGe:C BiCMOS technology with fT/f\text {max} of 300/500 GHz is presented. The design is implemented following a distributed amplifier topology in a differential manner. The driver features a small-signal gain of 12.5 dB and a 3-dB bandwidth of 90 GHz and delivers a maximum output amplitude of 4~V\text {pp} to a 100- $\Omega $ differential load. Delivering the maximum output swing, the large-signal gain is 10.5 dB. Time-domain measurements are performed, showing the maximum output swing with ON–OFF keying (OOK) eye-diagrams up to 64 Gb/s and pulse amplitude modulation-4 up to 45 Gbaud (90 Gb/s). Moreover, OOK eye-diagrams up to 120 Gb/s are reported with an output swing of 3~V_{\text {ppd}} . Total harmonic distortion measurements are also conducted demonstrating a value of 5% at 1 and 8 GHz up to an input amplitude of 800 mVppd. Using a reduced number of stages in the design, the power dissipation of the integrated circuit is 550 mW, resulting in an output power to power dissipation ratio of 3.6%. To the best knowledge of the authors, this is the first time a linear driver for optical modulators demonstrates such high bandwidth and efficiency for the demonstrated data-rates. [ABSTRACT FROM PUBLISHER]
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Database: Engineering Source
Description
Abstract:In this paper, a linear driver for optical modulators in a 0.13- \mu \textm SiGe:C BiCMOS technology with fT/f\text {max} of 300/500 GHz is presented. The design is implemented following a distributed amplifier topology in a differential manner. The driver features a small-signal gain of 12.5 dB and a 3-dB bandwidth of 90 GHz and delivers a maximum output amplitude of 4~V\text {pp} to a 100- $\Omega $ differential load. Delivering the maximum output swing, the large-signal gain is 10.5 dB. Time-domain measurements are performed, showing the maximum output swing with ON–OFF keying (OOK) eye-diagrams up to 64 Gb/s and pulse amplitude modulation-4 up to 45 Gbaud (90 Gb/s). Moreover, OOK eye-diagrams up to 120 Gb/s are reported with an output swing of 3~V_{\text {ppd}} . Total harmonic distortion measurements are also conducted demonstrating a value of 5% at 1 and 8 GHz up to an input amplitude of 800 mVppd. Using a reduced number of stages in the design, the power dissipation of the integrated circuit is 550 mW, resulting in an output power to power dissipation ratio of 3.6%. To the best knowledge of the authors, this is the first time a linear driver for optical modulators demonstrates such high bandwidth and efficiency for the demonstrated data-rates. [ABSTRACT FROM PUBLISHER]
ISSN:00189480
DOI:10.1109/TMTT.2017.2757927