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高精度、高速度是当前模拟——数字、数字模拟转换器的研制和向高精尖发展的一个重要课题。但在事实上还大量存在着一些本身要求并不太高。一般精度、速度就能满足要求的使用场合。这时,认真加强对线路本身的改进设计就比较重要。对解码网络来说也是这样。当前一些书藉资料中介绍的BCD解码网络,它的建码量和所建立的电压量之间的比例关系是固定不变的。这就给BCD解码网络的广泛和灵活应用带来不便。本文所介绍的解码网络,是一种能够使建码量与它所对应的基准电压量之间的比例关系在很大范围内随意选择和调整的BCD解码网络。它不仅能使这种网络在设计上和使用上都变得比较灵活方便,而且,在相同条件和位数的情况下转换精度和转换速度都不会降低。
High-precision, high-speed is the current analog - digital, digital-analog converter development and to the sophisticated development of an important issue. However, there are in fact a large number of their own requirements is not too high. General accuracy, speed can meet the requirements of the use of occasions. At this moment, it is more important to conscientiously strengthen the improved design of the route itself. The same is true for decoding networks. The current literature on the number of BCD decoding network introduced, its code volume and the establishment of the proportion between the voltage is fixed. This brings inconvenience to the extensive and flexible application of BCD decoding networks. The decoding network introduced in this paper is a kind of BCD decoding network which can select and adjust the ratio between the amount of codes and the corresponding reference voltage in a wide range. Not only can it make this kind of network more flexible in design and use, but also, the conversion accuracy and conversion speed will not decrease under the same conditions and digits.