A Bulk-Driven Low-Power CMOS Transimpedance Amplifier for 5 Gb/s Intra-Computer Optical Communications

Kensuke Mizutani; Shunsuke Imaeda; Tsubasa Yabutani; Daisuke Ito; Makoto Nakamura

doi:10.1587/elex.23.20260094

This article has now been updated. Please use the final version.

A Bulk-Driven Low-Power CMOS Transimpedance Amplifier for 5 Gb/s Intra-Computer Optical Communications

Kensuke Mizutani, Shunsuke Imaeda, Tsubasa Yabutani, Daisuke Ito, Makoto Nakamura

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Keywords: Transimpedance amplifier (TIA), bulk-driven MOSFET, low-power design, optical communication, CMOS circuit, on-chip interconnect

JOURNAL FREE ACCESS Advance online publication

Article ID: 23.20260094

DOI https://doi.org/10.1587/elex.23.20260094

The final version of this article is now available: Vol. 23 (2026), No. 10 pp. 20260094-20260094

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Abstract

This paper presents a bulk-driven low-power transimpedance amplifier (TIA) for 5 Gb/s intra-computer optical communications, implemented in 65-nm CMOS technology. The design utilizes a bulk-driven technique with shorted gate and bulk terminals to enhance the gain, along with a two-stage inverter-based amplifier with series feedback and tail-current capacitance for bandwidth extension. Measurement results demonstrate a 3.76 GHz bandwidth with 0.81 mW power consumption, achieving an 82% power reduction compared to conventional low-power TIAs.

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