A low power, low noise neural amplifier, using bulk-driven cascode current mirror load

2015 9th International Conference on Electrical and Electronics Engineering (ELECO) Pub Date : 2015-11-01 DOI:10.1109/ELECO.2015.7394558

Noushin Ghaderi, Sayed-Mahdi Kazemi-Ghahfarokhi

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引用次数: 3

Abstract

Multi-channel neural recording amplification and receiving systems are an inseparable component in the treatment and investigation process of human nervous system. Due to the low amplitude of neural signal range and high number of neural recording channels, these systems should have low noise and low power consumption. In this work, a new telescopic transconductance operational amplifier is presented using the current source launched via the body (bulk-driven cascade current mirror (BDCCM)). The output swing of this amplifier has a considerable increase compared to the other telescopic transconductance amplifiers. The neural amplifier designed by the proposed transconductance amplifier has a high output swing as well as low noise efficiency factor, noise, and power consumption. The proposed amplifier has a power consumption of 6.9 μw, effective input noise of 2.45 μV/√hz, noise efficiency factor of 2.2, and gain of 38.9 dB in bandwidth of 0.089Hz-7kHz. This amplifier is simulated in the 180 nm MOSFET process; its output swing and power supply voltages are 0.7v and ±0.9v, respectively.

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一种低功耗、低噪声的神经放大器，采用大容量驱动级联电流镜像负载

多通道神经记录放大和接收系统是人类神经系统治疗和研究过程中不可分割的组成部分。由于神经信号范围的幅值小，神经记录通道的数量多，这些系统应具有低噪声和低功耗。本文提出了一种新型的伸缩式跨导运算放大器，其电流源由体驱动级联电流镜(BDCCM)发射。与其他伸缩式跨导放大器相比，该放大器的输出摆幅有相当大的增加。采用该跨导放大器设计的神经放大器具有高输出摆幅、低噪声、低效率因数、低噪声、低功耗等特点。该放大器功耗为6.9 μw，有效输入噪声为2.45 μV/√hz，噪声效率系数为2.2，在0.089Hz-7kHz带宽范围内增益为38.9 dB。在180nm MOSFET工艺中对该放大器进行了仿真;输出摆幅为0.7v，电源电压为±0.9v。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 9th International Conference on Electrical and Electronics Engineering (ELECO)

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