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    • 92. 发明授权
    • Method and apparatus for physical width expansion of a longest prefix match lookup table
    • 最长前缀匹配查找表的物理宽度扩展的方法和装置
    • US06880064B1
    • 2005-04-12
    • US09886650
    • 2001-06-21
    • David A. Brown
    • David A. Brown
    • G06F12/10H04L12/28H04L12/56
    • H04L45/00H04L45/7457
    • A lookup unit matrix combines a plurality of lookup units to provide a longest prefix match for a search key longer than the lookup unit's mapper key. A portion of the search key is provided to each of the plurality of lookup units in a single search request issued to the lookup unit matrix. Each lookup unit in the lookup unit matrix performs a multi-level search for the result value based on the portion of the search key forwarded as the mapper key and the result of a multilevel search in the previous lookup unit. The search results in a value corresponding to the search key stored in a single location in one of the lookup units.
    • 查找单元矩阵组合多个查找单元以提供比查找单元的映射关键字长的搜索关键字的最长前缀匹配。 在发布给查找单元矩阵的单个搜索请求中,将搜索关键字的一部分提供给多个查找单元中的每一个。 查找单元矩阵中的每个查找单元基于作为映射器键转发的搜索关键字的部分和在先前查找单元中的多级搜索的结果来执行结果值的多级搜索。 该搜索产生与存储在一个查找单元中的单个位置的搜索关键字对应的值。
    • 95. 发明授权
    • Method and apparatus for generating forward overrides in a packet switch
    • 在分组交换机中生成前向覆盖的方法和装置
    • US06661791B1
    • 2003-12-09
    • US09473074
    • 1999-12-28
    • David A. Brown
    • David A. Brown
    • H04L1228
    • H04L49/205H04L45/7453H04L49/3018H04L49/351
    • A memory is successively searched using the contents of a header included in a data packet in order to select a forwarding entry for the data packet. The searches use a header field for a different protocol layer. A next field stored in a forwarding entry is used to determine if another search is required. The data packet is forwarded according to the forwarding override stored in the selected forwarding entry selected from the final successive search. The received data packet is forwarded to a host processor, through the switch, to both the host processor and through the switch, or the received data packet is not forwarded, dependent on the selected forward override.
    • 使用包含在数据分组中的报头的内容连续地搜索存储器,以便选择数据分组的转发条目。 搜索使用不同协议层的头字段。 存储在转发条目中的下一个字段用于确定是否需要另一个搜索。 根据存储在从最后连续搜索中选择的转发条目中的转发优先级转发数据分组。 所接收的数据分组通过交换机被转发到主机处理器和通过交换机,或者所接收的数据分组不被转发,这取决于所选择的前向覆盖。
    • 97. 发明授权
    • System and method for deterring operation of a system outside a specified frequency range
    • 系统和方法,用于阻止系统在指定频率范围之外的操作
    • US06462554B2
    • 2002-10-08
    • US09504370
    • 2000-02-15
    • David A. Brown
    • David A. Brown
    • G01R3100
    • G06F1/28
    • A system and method for detecting the operation of an electronic device at a frequency that is outside a tested or warranted frequency range. An overvoltage detection device senses an operating voltage. When the sensed voltage exceeds a predetermined voltage level an overvoltage detection signal is generated. The overvoltage detection signal is coupled to an electronic device in which the operating frequency is related to the operating voltage. On receiving the overvoltage detection signal indicating out of warranty operation, the electronic device switches among a number of operating modes to deter the out of warranty operation.
    • 一种用于检测处于测试或保证的频率范围之外的频率的电子设备的操作的系统和方法。 过电压检测装置感测工作电压。 当检测到的电压超过预定电压电平时,产生过电压检测信号。 过电压检测信号耦合到其中工作频率与工作电压相关的电子设备。 电子设备在接收到指示不在保修期内的过电压检测信号时,会切换多种操作模式,以防止超出保修期。
    • 98. 发明授权
    • Multi-stage lookup for translating between signals of different bit lengths
    • 用于在不同位长的信号之间进行转换的多级查找
    • US06420982B1
    • 2002-07-16
    • US10022932
    • 2001-12-18
    • David A. Brown
    • David A. Brown
    • H03M700
    • H04L12/4641H04L45/745H04L49/201H04L49/351H04L49/354
    • A method and apparatus is provided for translating an L-bit put signal to a W-bit output signal such as a virtual network identification signal to an internal virtual network signal. The translation is performed using a multi-stage lookup. The input signal is portioned into a plurality of subsets of bits. A first index to a first stage is provided by combining a portion of bits and a first delta subset of bits. A second index to a second stage is provided by combining data stored at the first index in the first stage and the a second delta subset of bits. The corresponding output signal is stored at the last index in the last stage. The use of the multi-stage lookup instead of a single-stage lookup reduces the memory required to perform the translation.
    • 提供了一种方法和装置,用于将L位置信号转换为诸如虚拟网络识别信号的W位输出信号到内部虚拟网络信号。 使用多级查找来执行翻译。 输入信号被分成多个比特子集。 通过组合比特的一部分和比特的第一个Δ子集来提供到第一阶段的第一索引。 通过组合存储在第一级中的第一索引的数据和位的第二增量子集来提供第二级的第二索引。 相应的输出信号存储在最后一个阶段的最后一个索引处。 使用多级查找而不是单级查找减少了执行翻译所需的内存。
    • 99. 发明授权
    • Linearization of FET channel impedance for small signal applications
    • 用于小信号应用的FET通道阻抗的线性化
    • US06348834B1
    • 2002-02-19
    • US09570996
    • 2000-05-15
    • David A. Brown
    • David A. Brown
    • G05F110
    • H03F1/3205H03F1/301
    • A system that provides a means of effectively applying a mathematical substitution to the characteristic V/I equation for FET devices operating in the ohmic region that causes the non-linear (distortion producing) term to be cancelled thereby improving the realizable channel impedance linearity by orders of magnitude. The system comprised of a means to sum an isolated specific portion of the information signal applied to the FET with the Gate controlling voltage to produce a signal value that achieves the improved linearity result when applied to the FET Gate terminal.
    • 提供了一种有效地将数学代替应用于在欧姆区工作的FET器件的特征V / I方程的方法,该方法导致非线性(失真产生)项被消除,从而通过订单提高可实现的通道阻抗线性度 的数量。 该系统包括将施加到FET的信号信号的孤立特定部分与门控制电压相加的装置,以产生当施加到FET栅极端子时实现改善的线性度结果的信号值。