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    • 4. 发明授权
    • Control flow in a ring buffer
    • 环路缓冲区中的控制流程
    • US08516170B2
    • 2013-08-20
    • US13619050
    • 2012-09-14
    • Joseph H. AllenDavid J. HoewelerJohn A. Shriver
    • Joseph H. AllenDavid J. HoewelerJohn A. Shriver
    • G06F3/00
    • G06F5/10
    • A computer implemented method for writing to a software bound ring buffer. A network adapter may determine that data is available to write to the software bound ring buffer. The network adapter determines that a read index is not equal to a write index, responsive to a determination that data is available to write to the software bound ring buffer. The network adapter writes the data to memory referenced by the hardware write index, wherein memory referenced by the write index is offset according to an offset, and the memory contents comprise a data portion and a valid bit. The network adapter writes an epoch value of the write index to the valid bit. The network adapter increments the write index, responsive to writing the data to memory referenced by the write index. Further disclosed is method to access a hardware bound ring buffer.
    • 一种用于写入软件绑定环形缓冲区的计算机实现的方法。 网络适​​配器可以确定数据可用于写入软件绑定环形缓冲器。 响应于确定数据可用于写入软件绑定环形缓冲区,网络适配器确定读取索引不等于写入索引。 网络适​​配器将数据写入由硬件写入索引引用的存储器,其中由写入索引引用的存储器根据偏移量被偏移,并且存储器内容包括数据部分和有效位。 网络适​​配器将写索引的时期值写入有效位。 响应于将数据写入由写入索引引用的存储器,网络适配器会增加写入索引。 进一步公开的是访问硬件绑定环形缓冲器的方法。
    • 5. 发明授权
    • Ring buffer
    • 环形缓冲区
    • US08291136B2
    • 2012-10-16
    • US12629445
    • 2009-12-02
    • Joseph H. AllenDavid J. HoewelerJohn A. Shriver
    • Joseph H. AllenDavid J. HoewelerJohn A. Shriver
    • G06F3/00
    • G06F5/10
    • A computer implemented method for writing to a software bound ring buffer. A network adapter may determine that data is available to write to the software bound ring buffer. The network adapter determines that a read index is not equal to a write index, responsive to a determination that data is available to write to the software bound ring buffer. The network adapter writes the data to memory referenced by the hardware write index, wherein memory referenced by the write index is offset according to an offset, and the memory contents comprise a data portion and a valid bit. The network adapter writes an epoch value of the write index to the valid bit. The network adapter increments the write index, responsive to writing the data to memory referenced by the write index. Further disclosed is method to access a hardware bound ring buffer.
    • 一种用于写入软件绑定环形缓冲区的计算机实现的方法。 网络适​​配器可以确定数据可用于写入软件绑定环形缓冲器。 响应于确定数据可用于写入软件绑定环形缓冲区,网络适配器确定读取索引不等于写入索引。 网络适​​配器将数据写入由硬件写入索引引用的存储器,其中由写入索引引用的存储器根据偏移量被偏移,并且存储器内容包括数据部分和有效位。 网络适​​配器将写索引的时期值写入有效位。 响应于将数据写入由写入索引引用的存储器,网络适配器会增加写入索引。 进一步公开的是访问硬件绑定环形缓冲器的方法。
    • 6. 发明申请
    • RING BUFFER
    • 环形缓冲器
    • US20130013868A1
    • 2013-01-10
    • US13619050
    • 2012-09-14
    • Joseph H. AllenDavid J. HoewelerJohn A. Shriver
    • Joseph H. AllenDavid J. HoewelerJohn A. Shriver
    • G06F12/00
    • G06F5/10
    • A computer implemented method for writing to a software bound ring buffer. A network adapter may determine that data is available to write to the software bound ring buffer. The network adapter determines that a read index is not equal to a write index, responsive to a determination that data is available to write to the software bound ring buffer. The network adapter writes the data to memory referenced by the hardware write index, wherein memory referenced by the write index is offset according to an offset, and the memory contents comprise a data portion and a valid bit. The network adapter writes an epoch value of the write index to the valid bit. The network adapter increments the write index, responsive to writing the data to memory referenced by the write index. Further disclosed is method to access a hardware bound ring buffer.
    • 一种用于写入软件绑定环形缓冲区的计算机实现的方法。 网络适​​配器可以确定数据可用于写入软件绑定环形缓冲器。 响应于确定数据可用于写入软件绑定环形缓冲区,网络适配器确定读取索引不等于写入索引。 网络适​​配器将数据写入由硬件写索引引用的存储器,其中由写入索引引用的存储器根据偏移量偏移,存储器内容包括数据部分和有效位。 网络适​​配器将写索引的时期值写入有效位。 响应于将数据写入由写入索引引用的存储器,网络适配器会增加写入索引。 进一步公开的是访问硬件绑定环形缓冲器的方法。
    • 7. 发明申请
    • Ring Buffer
    • 环形缓冲区
    • US20110131352A1
    • 2011-06-02
    • US12629445
    • 2009-12-02
    • Joseph H. AllenDavid J. HoewelerJohn A. Shriver
    • Joseph H. AllenDavid J. HoewelerJohn A. Shriver
    • G06F5/00
    • G06F5/10
    • A computer implemented method for writing to a software bound ring buffer. A network adapter may determine that data is available to write to the software bound ring buffer. The network adapter determines that a read index is not equal to a write index, responsive to a determination that data is available to write to the software bound ring buffer. The network adapter writes the data to memory referenced by the hardware write index, wherein memory referenced by the write index is offset according to an offset, and the memory contents comprise a data portion and a valid bit. The network adapter writes an epoch value of the write index to the valid bit. The network adapter increments the write index, responsive to writing the data to memory referenced by the write index. Further disclosed is method to access a hardware bound ring buffer.
    • 一种用于写入软件绑定环形缓冲区的计算机实现的方法。 网络适​​配器可以确定数据可用于写入软件绑定环形缓冲器。 响应于确定数据可用于写入软件绑定环形缓冲区,网络适配器确定读取索引不等于写入索引。 网络适​​配器将数据写入由硬件写入索引引用的存储器,其中由写入索引引用的存储器根据偏移量被偏移,并且存储器内容包括数据部分和有效位。 网络适​​配器将写索引的时期值写入有效位。 响应于将数据写入由写入索引引用的存储器,网络适配器会增加写入索引。 进一步公开的是访问硬件绑定环形缓冲器的方法。
    • 8. 发明授权
    • Testing frequency hopping devices
    • 测试跳频设备
    • US06564350B1
    • 2003-05-13
    • US09608040
    • 2000-06-30
    • David J. HoewelerMichael A. Rothman
    • David J. HoewelerMichael A. Rothman
    • G01R3128
    • H03L7/00G01R31/2822G01R31/3167
    • An improved system and method for testing high frequency electronic devices. The improvement allows characteristics such as phase noise to be measured while a device under test changes operating frequency (frequency hops) at its normal rate. In accordance with the invention, a dynamic controller programs the frequencies of first and second frequency synthesizers at precisely controlled instants of time. For each of the first and second synthesizers, the dynamic controller includes a frequency memory for storing a sequence of frequency data, a counter for sequencing through the frequency memory, and a timing source for activating the counter. Data stored at each location of the frequency memory represents a frequency to which the respective synthesizer is to be programmed. The output from the first synthesizer is provided to the input of a device under test (DUT), in response to which the DUT generates and output signal. A mixer receives at its inputs the output of the DUT and the output of the second synthesizer. The mixer combines the two inputs to generate a test signal. The test signal can then be digitized, and the resulting digital samples can be evaluated. Under control of the timing source, the dynamic controller steps through different addresses of the frequency memories for the first and second synthesizers. At each memory location, new data are sent to the synthesizers at precisely controlled instants of time. New frequencies are established, and the test signal is again digitized. Characteristics of the DUT can be determined from the digital samples at each frequency that the DUT assumes.
    • 一种用于测试高频电子设备的改进的系统和方法。 该改进允许在被测器件以正常速率改变工作频率(跳频)时测量相位噪声等特性。 根据本发明,动态控制器以精确控制的时刻对第一和第二频率合成器的频率进行编程。 对于第一和第二合成器中的每一个,动态控制器包括用于存储频率数据序列的频率存储器,用于通过频率存储器排序的计数器和用于激活计数器的定时源。 存储在频率存储器的每个位置处的数据表示相应合成器要编程的频率。 来自第一合成器的输出被提供给待测器件(DUT)的输入端,响应于DUT产生和输出信号。 混合器在其输入端接收DUT的输出和第二合成器的输出。 混频器组合两个输入以产生测试信号。 然后可以将测试信号数字化,并且可以评估所得到的数字样本。 在定时源的控制下,动态控制器跨越第一和第二合成器的频率存储器的不同地址。 在每个存储器位置,新的数据在精确控制的时刻发送到合成器。 建立新的频率,再次对测试信号进行数字化处理。 DUT的特性可以从DUT所采用的每个频率的数字样本确定。