公开(公告)号：US07973693B2

公开(公告)日：2011-07-05

申请号：US12601086

申请日：2008-05-27

申请人： Simon M. Louwsma ,  Maarten Vertregt

发明人： Simon M. Louwsma ,  Maarten Vertregt

IPC分类号： H03M1/34

CPC分类号： H03M1/462 ,  H03M1/144

摘要： During successive approximation analog to digital conversion a series of successive digital reference values is selected that converges towards a digital representation of an analog input signal. An analog reference signal is generated dependent on the successive digital reference values and compared to the analog input signal. The digital reference values are selected dependent on comparison results. In the selection of the digital reference values successive steps between digital reference values are each selected dependent on values of the comparator result from a plurality of preceding recursion cycles. The comparison results define a series of successively narrower ranges of digital values that contain a digital representation of the analog input signal. Use of a plurality of comparator results for selecting the steps in the digital reference values makes it possible to reduce uncertainty about whether the comparison result has settled. This in turn makes it possible to reduce the sizes of the successive ranges, which speeds up convergence.

摘要翻译： 在逐次近似模拟到数字转换期间，选择一系列连续的数字参考值，其朝向模拟输入信号的数字表示收敛。 根据连续的数字参考值产生模拟参考信号，并与模拟输入信号进行比较。 根据比较结果选择数字参考值。 在数字参考值的选择中，数字参考值之间的连续步骤分别根据多个先前递归周期的比较器结果的值来选择。 比较结果定义了一系列连续较窄的数字值范围，其中包含模拟输入信号的数字表示。 使用多个比较器结果来选择数字参考值中的步骤使得可以减小比较结果是否已经确定的不确定性。 这又可以减小连续范围的尺寸，这加快了收敛速度。

公开(公告)号：US20100164778A1

公开(公告)日：2010-07-01

申请号：US12601086

申请日：2008-05-27

申请人： Simon M. Louwsma ,  Maarten Vertregt

发明人： Simon M. Louwsma ,  Maarten Vertregt

IPC分类号： H03M1/38

CPC分类号： H03M1/462 ,  H03M1/144

摘要： During successive approximation analog to digital conversion a series of successive digital reference values is selected that converges towards a digital representation of an analog input signal. An analog reference signal is generated dependent on the successive digital reference values and compared to the analog input signal. The digital reference values are selected dependent on comparison results. In the selection of the digital reference values successive steps between digital reference values are each selected dependent on values of the comparator result from a plurality of preceding recursion cycles. The comparison results define a series of successively narrower ranges of digital values that contain a digital representation of the analog input signal. Use of a plurality of comparator results for selecting the steps in the digital reference values makes it possible to reduce uncertainty about whether the comparison result has settled. This in turn makes it possible to reduce the sizes of the successive ranges, which speeds up convergence.

摘要翻译： 在逐次近似模拟到数字转换期间，选择一系列连续的数字参考值，其朝向模拟输入信号的数字表示收敛。 根据连续的数字参考值产生模拟参考信号，并与模拟输入信号进行比较。 根据比较结果选择数字参考值。 在数字参考值的选择中，数字参考值之间的连续步骤分别根据多个先前递归周期的比较器结果的值来选择。 比较结果定义了一系列连续较窄的数字值范围，其中包含模拟输入信号的数字表示。 使用多个比较器结果来选择数字参考值中的步骤使得可以减小比较结果是否已经确定的不确定性。 这又可以减小连续范围的尺寸，这加快了收敛速度。