Novak J L, Wheeler B C
Electrical and Computer Engineering Department, University of Illinois, Urbana-Champaign 61801.
J Neurosci Methods. 1989 Jan;26(3):239-47. doi: 10.1016/0165-0270(89)90122-2.
An inexpensive 32-channel data acquisition system has been constructed for use in acquiring neuroelectric data from a multiple element electrode array. Direct memory access (DMA) techniques allowed a maximum aggregate sampling rate of 652 ksamples/s, or 20.4 ksamples/s on 32 channels. The 8-bit analog-to-digital (A/D) conversion circuitry lies on a single plug-in card installed in an IBM PC-compatible AT & T 6300 Plus personal computer, although the card may be used in an IBM PC with no reduction in sampling performance. Data have been taken from 32 points on the surface of the rat hippocampal slice preparation. Assembly language graphics routines permitted rapid display of raw and processed data. Signal processing routines can be executed and results can be displayed to provide rapid feedback to an experimenter.
已构建了一个价格低廉的32通道数据采集系统，用于从多单元电极阵列采集神经电数据。直接内存访问（DMA）技术允许的最大总采样率为652千样本/秒，即32通道时为20.4千样本/秒。8位模数（A/D）转换电路位于安装在IBM PC兼容的AT&T 6300 Plus个人计算机中的单个插件卡上，不过该卡在IBM PC中使用时采样性能不会降低。数据取自大鼠海马切片制备表面的32个点。汇编语言图形例程允许快速显示原始数据和处理后的数据。可以执行信号处理例程并显示结果，以便为实验人员提供快速反馈。
