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

2026-04-01

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Mizutani, Kensuke *

Imaeda, Shunsuke

Yabutani, Tsubasa

Ito, Daisuke

Nakamura, Makoto

DOI：10.1587/elex.23.20260094

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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-cur rent 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.

Keywords:

Transimpedance amplifier (TIA)

bulk-driven MOSFET

low-power design

optical communication

CMOS circuit

on-chip interconnect

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

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