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<p>This paper presents an ultra-low-power, low-noise transimpedance amplifier (TIA) based on a modified Flipped Voltage Follower (FVF) architecture for 10&#xa0;Gb/s optical receiver. The proposed design introduces a feedforward path that combines the advantages of both FVF and Regulated Cascode (RGC) topologies, achieving very low input resistance through active feedback. Post-layout simulations in 65&#xa0;nm CMOS technology demonstrate a transimpedance gain of 51.6&#xa0;dBΩ, a bandwidth of 6.54&#xa0;GHz, an input-referred noise of 12.3&#xa0;pA/√Hz, and a power consumption of 0.64&#xa0;mW under a 1.1&#xa0;V supply. Compared with conventional FVF TIA, the proposed structure achieves 61% improvement in bandwidth, a 53% reduction in input resistance, and lower noise, making it highly suitable for compact and energy-efficient optical receivers.</p>

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An Ultra-Low-Power, Low-Noise Transimpedance Amplifier Based on FVF

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Bahram Jalil,
  • Mehdi Dolatshahi,
  • Somayeh Kazemi

摘要

This paper presents an ultra-low-power, low-noise transimpedance amplifier (TIA) based on a modified Flipped Voltage Follower (FVF) architecture for 10 Gb/s optical receiver. The proposed design introduces a feedforward path that combines the advantages of both FVF and Regulated Cascode (RGC) topologies, achieving very low input resistance through active feedback. Post-layout simulations in 65 nm CMOS technology demonstrate a transimpedance gain of 51.6 dBΩ, a bandwidth of 6.54 GHz, an input-referred noise of 12.3 pA/√Hz, and a power consumption of 0.64 mW under a 1.1 V supply. Compared with conventional FVF TIA, the proposed structure achieves 61% improvement in bandwidth, a 53% reduction in input resistance, and lower noise, making it highly suitable for compact and energy-efficient optical receivers.