| 应用Intel 8279芯片实现多路D／A转换 |
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| 引用本文： | 张富有,黄辉. 应用Intel 8279芯片实现多路D／A转换[J]. 北京理工大学学报, 1993, 13(3): 443-446 |
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| 作者姓名： | 张富有 黄辉 |
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| 作者单位： | 北京理工大学自动控制系，北京理工大学自动控制系，北京理工大学自动控制系，北京理工大学自动控制系 北京 100081，北京 100081，北京 100081，北京 100081 |
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| 摘 要： | 一种多路D/A转换器,它主要由Intel 8279芯片、一路基本D/A转换电路、一个模拟开关和相应的采样保持器组成,与其它的多路D/A电路相比,其不同之处在于它用8279中的显示RAM和扫描线实现转换数据的存放和对各路D/A的循环扫描,从而减轻了CPU的负担,而且电路简单,成本低.经过研究表明,这种电路不仅能实现8路8位的D/A转换,而且还能实现16路8位和8路16位的多路D/A转换。
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| 关 键 词： | 数－模转换器 采样保持电路 芯片 |
Multi-Channel D/A Conversion with the Intel 8279 Chip |
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| Zhang Fuyou Huang Hui Chen Lushen Liu Zhongxin. Multi-Channel D/A Conversion with the Intel 8279 Chip[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 1993, 13(3): 443-446 |
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| Authors: | Zhang Fuyou Huang Hui Chen Lushen Liu Zhongxin |
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| Abstract: | Introduces a new multi-channel D/A conversion circuit, consisting of an Intel 8279 chip, a basic D/A conversion circuit, an analog-switch and devices for sampling and hold. In comparison with other D/A conversion circuits, it makes use of the display-RAM and scanning rays of the Intel 8279 chip to store the conversion data and to scan through D/A channel one by one, thus the CPU can be freed from heavy burdens. The circuit used is simple and low in its cost. Further, this circuit can not only complete 8 channel, 8 bit D/A conversion, but also 16 channel, 8 bit or 8 channel, 16 bit D/A conversion. |
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| Keywords: | D/A converters sampling hold circuits/Intel 8279 chip circulating scan |
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