公开(公告)号：US06477071B1

公开(公告)日：2002-11-05

申请号：US09850882

申请日：2001-05-07

申请人： Anders Edman ,  Henrik Johansson

发明人： Anders Edman ,  Henrik Johansson

IPC分类号： G11C1500

CPC分类号： G11C15/04

摘要： The present invention provides a content addressable memory (CAM) circuit that includes at least one row of memory cells storing data to be subjected to search data for a compare operation, with the cells in each row being inter-connected by a match line. Each cell can, if the search data does not match the stored data, discharge the match line in an evaluation operation. According to the present invention, a match line is partitioned into a least two segments, each segment having a first unit for precharging and evaluating the match line segment and a second unit for determining the result of the evaluation operation. The compare operation of the second and any subsequent segments is performed and the corresponding matchline segment involved only if the result of the compare operation of the respective preceding segment indicates a data match.

摘要翻译： 本发明提供一种内容可寻址存储器（CAM）电路，其包括存储要进行比较操作的搜索数据的数据的至少一行存储器单元，每行中的单元通过匹配线相互连接。 如果搜索数据与存储的数据不匹配，则每个单元格可以在评估操作中排除匹配行。 根据本发明，将匹配线划分为至少两个段，每个段具有用于对匹配线段进行预充电和评估的第一单元和用于确定评估操作的结果的第二单元。 执行第二和任何后续段的比较操作，并且仅当相应的先前段的比较操作的结果指示数据匹配时才涉及对应的匹配线段。

公开(公告)号：US06218976B1

公开(公告)日：2001-04-17

申请号：US09293884

申请日：1999-04-19

申请人： Jan-Erik Eklund ,  Anders Edman

发明人： Jan-Erik Eklund ,  Anders Edman

IPC分类号： H03M138

CPC分类号： H03M1/0695 ,  H03M1/38

摘要： A process and device for providing an analog-to-digital conversion employing a successive approximation principle is provided. The search interval from a value X to a Value Y, which represents the value interval in which an unknown analog signal is to be converted to a digital signal value, is divided into a number of smaller search intervals, being divided into different area for employing a successive approximation process to iterate to the desired digital signal value. Further, reference levels are defined for each search interval to coincide with at least one other reference level, where coinciding reference level belongs to two search intervals formed by areas in a nearest larger search interval.

摘要翻译： 提供了一种使用逐次逼近原理提供模数转换的处理和装置。 从值X到值Y的搜索间隔被划分成较小的搜索间隔的数量，该值Y表示未知模拟信号要转换为数字信号值的值间隔，被划分为不同的区域用于采用 逐次逼近处理以迭代到期望的数字信号值。 此外，为每个搜索间隔定义参考水平以与至少一个其他参考水平一致，其中一致的参考水平属于由最近较大的搜索间隔中的区域形成的两个搜索间隔。