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<p>This article proposes a noise-efficient bio-amplifier design for brain-machine interfaces (BMIs). The design utilizes an Operational Transconductance Amplifier (OTA) with a Flipped Voltage Follower (FVF) circuit and composite transistor topology, achieving a balance between power consumption and noise. The proposed design demonstrates a Noise Efficiency Factor (NEF) of 1.08 and power consumption of 1.5&#xa0;µW. Stability analysis confirms a Phase Margin of 62°, ensuring OTA stability. The bio-amplifier using the proposed OTA is designed and simulated in Cadence Virtuoso using 180&#xa0;nm technology, occupying an area of 0.0573 mm<sup>2</sup>. The proposed design’s performance metrics make it suitable for analog front-end (AFE) applications in BMIs, enabling efficient neural signal processing. This design’s compact area, low power consumption, and noise efficiency make it an attractive solution for implantable and wearable devices.</p>

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Design of a noise efficient bio-amplifier using CCFVF OTA for neurological signal acquisition

  • 期刊论文

  • 发表日期：

    2025年10月6日

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  • Sourav Nath,
  • Swagata Devi,
  • Naushad Manzoor Laskar,
  • Koushik Guha,
  • Krishna Lal Baishnab

摘要

This article proposes a noise-efficient bio-amplifier design for brain-machine interfaces (BMIs). The design utilizes an Operational Transconductance Amplifier (OTA) with a Flipped Voltage Follower (FVF) circuit and composite transistor topology, achieving a balance between power consumption and noise. The proposed design demonstrates a Noise Efficiency Factor (NEF) of 1.08 and power consumption of 1.5 µW. Stability analysis confirms a Phase Margin of 62°, ensuring OTA stability. The bio-amplifier using the proposed OTA is designed and simulated in Cadence Virtuoso using 180 nm technology, occupying an area of 0.0573 mm2. The proposed design’s performance metrics make it suitable for analog front-end (AFE) applications in BMIs, enabling efficient neural signal processing. This design’s compact area, low power consumption, and noise efficiency make it an attractive solution for implantable and wearable devices.