UWB signal digitization depends, to a large extent, on the accuracy of sampling time. A high - accuracy programmable timer is therefore the key to implementing UWB signal data acquisition.
超宽带信号的数字化在很大程度上取决于采样时刻的准确性，因此是否具有高精度的可编程定时器是实现超宽带信号数据采集的关键。
The way of data transfer in DMA mode, control method of logical programmable device and design of driver program are discussed to solve the key point of sequential transmission.
给出DMA工作方式下数据传输的设计方法，可编程逻辑器件的控制逻辑和驱动程序设计，解决了数据传输连续性的关键问题。
The key part of the CCD drive circuit is a pulse generation circuit, for the present, which is generally achieved by employing the programmable logic devices at home and abroad.
CCD驱动电路的关键部分是时序脉冲产生电路，目前国内外大都采用可编程逻辑器件来设计这部分。
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