Obeid Iyad, Nicolelis Miguel A L, Wolf Patrick D
Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA.
J Neurosci Methods. 2004 Feb 15;133(1-2):33-8. doi: 10.1016/j.jneumeth.2003.09.023.
We present the design, testing, and evaluation of a 16 channel wearable telemetry system to facilitate multichannel single unit recordings from freely moving test subjects. Our design is comprised of (1) a 16-channel analog front end board to condition and sample signals derived from implanted neural electrodes, (2) a digital board for processing and buffering the digitized waveforms, and (3) an index-card sized 486 PC equipped with an IEEE 802.11b wireless ethernet card. Digitized data (up to 12 bits of resolution at 31.25k samples/s per channel) is transferred to the PC and sent to a nearby host computer on a wireless local area network. Up to 12 of the 16 channels were transmitted simultaneously for sustained periods at a range of 9 m. The device measures 5.1 cm x 8.1 cm x 12.4 cm, weighs 235 g, and is powered from rechargeable lithium ion batteries with a lifespan of 45 min at maximum transmission power. The device was successfully used to record signals from awake, chronically implanted macaque and owl monkeys.
我们展示了一种16通道可穿戴遥测系统的设计、测试和评估，以促进对自由活动的实验对象进行多通道单神经元记录。我们的设计包括：（1）一个16通道模拟前端板，用于调节和采样来自植入式神经电极的信号；（2）一个数字板，用于处理和缓冲数字化波形；（3）一个索引卡大小的486个人计算机，配备IEEE 802.11b无线以太网网卡。数字化数据（每通道31.25k样本/秒时分辨率高达12位）被传输到个人计算机，并通过无线局域网发送到附近的主机。16个通道中的多达12个通道在9米的范围内持续同时传输。该设备尺寸为5.1厘米×8.1厘米×12.4厘米，重235克，由可充电锂离子电池供电，在最大发射功率下使用寿命为45分钟。该设备已成功用于记录清醒的、长期植入电极的猕猴和猫头鹰猴的信号。
