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1. 发明授权

US4400692A Method for periodic digital to analog conversion 失效
标题翻译：周期性数模转换的方法
公开(公告)号：US4400692A
公开(公告)日：1983-08-23
申请号：US320675
申请日：1981-11-12
申请人： Reto Klein
发明人： Reto Klein
IPC分类号： H03M1/00 , H03K13/02
CPC分类号： H03M1/82 , H03M1/86
摘要： For converting a digital value into an analog value, the digital value is first converted into a binary number and then selected auxiliary pulse trains corresponding to the binary number are used to control a switch which connects a capacitor alternatively to a reference voltage source or to ground to charge the capacitor to a voltage which corresponds to the converted analog value. The pulses in the auxiliary pulse trains associated with each binary position are grouped into pulse groups and the pulse groups of each pulse train are distributed over the duration of a conversion period in such a manner that during the superimposition of auxiliary pulse trains the number of pulse groups is not increased but the existing pulse groups are widened by being placed next to each other. In addition, the width of the single pulses forming the pulse groups is doubled so that the pulse groups are transformed into width-modulated pulses.
摘要翻译：为了将数字值转换为模拟值，首先将数字值转换为二进制数，然后使用与二进制数相对应的选定辅助脉冲串来控制将电容器与参考电压源或地之间连接的开关以将电容器充电到对应于转换的模拟值的电压。与每个二进制位置相关联的辅助脉冲串中的脉冲被分组成脉冲组，并且每个脉冲序列的脉冲组在转换周期的持续时间内分布，使得在辅助脉冲序列叠加脉冲数组不增加，但是现有的脉冲组被放置在彼此相邻的位置。此外，形成脉冲组的单个脉冲的宽度被加倍，使得脉冲组被转换成宽度调制的脉冲。

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