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公开(公告)号:US08188902B2
公开(公告)日:2012-05-29
申请号:US12858104
申请日:2010-08-17
IPC分类号: H03M1/34
摘要: Traditionally, successive approximation register (SAR) analog-to-digital converters (ADCs) using binary search algorithms have consumed power by performing unnecessary switching of a capacitive digital-to-analog converter (CDAC) when a CDAC voltage is relatively close to a sampling analog input signal. Here, a SAR ADC is provided that reduces the number of switching events. To accomplish this, a multi-stage comparator is provided that generates multiple output signals for SAR logic. Based on these outputs, the SAR logic can more efficiently switch its CDAC using a ternary search algorithm to reduce power consumption and improve efficiency.
摘要翻译: 传统上,使用二进制搜索算法的逐次逼近寄存器(SAR)模数转换器(ADC)通过在CDAC电压相对接近采样时执行电容性数模转换器(CDAC)的不必要的切换来消耗功率 模拟输入信号。 这里,提供了一个减少开关事件数量的SAR ADC。 为了实现这一点,提供了多级比较器,其产生用于SAR逻辑的多个输出信号。 基于这些输出,SAR逻辑可以使用三元搜索算法更有效地切换其CDAC,以降低功耗并提高效率。