A 64-channel wireless implantable system-on-chip for gastric electrical-wave recording
A 64-channel wireless implantable system-on-chip for gastric electrical-wave recording
复制标题
用于胃电波记录的 64 通道无线植入片上系统
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
A. Farajidavar
中科院分区：
文献类型：
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作者：
Ahmed Ibrahim;M. Kiani;A. Farajidavar
本文介绍了一种用于胃电生理研究的64通道无线植入式片上系统（SoC）的设计和布局后仿真结果。SoC包括64个时分复用低噪声放大器（LNA），后面是一个10位低功耗逐次逼近寄存器（SAR）模数转换器（ADC），以及一个电源管理单元，用于对SoC电池进行感应充电，并通过接收器线圈的负载移位键控（LSK）调制与外部读取器通信。该SoC采用0.35 μm标准CMOS工艺设计，面积25 mm 2。在布局后仿真中，每个LNA均实现了40-52 dB的可调增益和6 μVrms的折合输入噪声，带宽为10 mHz-2 Hz，功耗为40 nA（采用2.5 V单电源供电）。每个通道以244 Hz采样，分辨率为10位，导致记录64个通道的净数据速率为156 kbps。电源管理，工作在13.56 MHz，充电3.7 V电池，可调电流范围为0-15 mA，同时保持整流器电压恒定在4.4 V。
This paper presents the design and post-layout simulation results of a 64-channel wireless and implantable system-on-chip (SoC) for studying gastric electrophysiology. The SoC includes 64 time-multiplexed low-noise amplifiers (LNAs) followed by a 10-bit low-power successive approximation register (SAR) analog-to-digital converter (ADC), and a power management unit for recharging the SoC battery inductively and communicating with an external reader via load-shift keying (LSK) modulation of the receiver coil. The SoC has been designed in a 0.35 μm standard CMOS process, occupying 25 mm2. In post-layout simulations, each LNA achieved an adjustable gain of 40–52 dB, and an input-referred noise of 6 μVrms within the bandwidth of 10 mHz–2 Hz while consuming 40 nA from a single 2.5 V supply. Each channel was sampled at 244 Hz with 10 bits of resolution, leading to the net data rate of 156 kbps for recording 64 channels. The power management, operating at 13.56 MHz, recharged a 3.7 V battery with the adjustable current range of 0–15 mA while maintaining the rectifier voltage constant at 4.4 V.