An energy-efficient 25-Gb/s common gate feedforward transimpedance amplifier

カテゴリ：国際会議

論文No：B5

グループ名：【C】AVIC2025

発行日：2025/10/20

著者名：Hikaru Matsunami (Gifu University), Yasuhuiro Takahashi (Gifu University)

キーワード：Transimpedance amplifier,Optical communication,TIA,CGFW,Peaking gain

要約(英語)：This paper presents a common gate-feedforward (CGFW) circuit-based transimpedance amplifier (TIA) with peaking gain. The proposed TIA core circuit has wider bandwidth characteristics than the conventional CGFW circuits. The number of post-amplifier stages can be reduced to one by increasing the gain of the TIA core circuit, resulting in low-power operation. Fabricated in a 65 nm bulk-CMOS technology, the proposed TIA circuit achieves a transimpedance gain of 72.2 dBOmega and a bandwidth of 20.9 GHz. Operating at a supply voltage of 1.1 V, the circuit consumes 18.7 mW (=17.0 mA x 1.1 V). The result is a data rate of 25 Gbps with an energy efficiency of 0.75 pJ/bit. The total layout area, including I/O pads and DC pads, is 670 um x 580 um (=0.39 mm2), while the TIA core circuit occupies 470 um x 210 um (=0.099 mm2).

本誌掲載ページ：41-44p

原稿種別：英語

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