Paraskevopoulou Sivylla E, Eftekhar Amir, Kulasekeram Nishanth, Toumazou Christofer
Annu Int Conf IEEE Eng Med Biol Soc. 2015 Aug;2015:2693-6. doi: 10.1109/EMBC.2015.7318947.
This paper presents an AC-coupled instrumentation amplifier for electroneurogram (ENG) activity recording. For this design, we evaluate gain and noise requirements based on interference sources (electrodes, power line, EMG). The circuit has been implemented in a commercially-available 0.35μm CMOS technology with total power consumption 460μW. The amplifier achieves CMRR 107 dB and integrated input referred noise 940 nV. The gain is 63 dB and the bandwidth is 0.5 Hz- 13 kHz. The chosen topology enables to minimise on-chip capacitance (only 27 pF), with a total chip area of 0.4mm2.
本文介绍了一种用于记录神经电图（ENG）活动的交流耦合仪表放大器。对于该设计，我们基于干扰源（电极、电源线、肌电图）评估了增益和噪声要求。该电路采用市售的0.35μm CMOS技术实现，总功耗为460μW。该放大器的共模抑制比（CMRR）为107 dB，集成输入参考噪声为940 nV。增益为63 dB，带宽为0.5 Hz至13 kHz。所选用的拓扑结构能够将片上电容最小化（仅27 pF），芯片总面积为0.4mm²。
