-
公开(公告)号：UST102502I4
公开(公告)日：1982-12-07
申请号：US260620
申请日：1981-05-05
IPC分类号： G11C19/08
CPC分类号： G11C19/08
摘要： This invention relates to the reduction of gaps in the flow of data accessed in a synchronous serial storage serial communicating data processing memory by the provision of access storage capability at each storage location. The problem to which the invention is directed is the fact that in a synchronously driven array of the type having a number of data storage locations that are accessed by a communicating channel linking all the storage locations in series, the information flow in the communication channel will be limited by the time required for the proper point to be moved around each storage location and the resulting gaps in the data will effect the speed of response. The invention takes the bits to be transferred as they are synchronously propagated around one loop and holds them as the data is synchronously propagated around the other loop until the insertion point arrives. The invention provides a specific size buffer or intermediate storage loop that can hold the amount of data being transferred until the timing is accommodated. The intermediate loop buffer must be big enough for the transferring data but it should not be much larger or there will still be a gap in the data in the communicating loop in proportion to the amount the intermediate loop is oversize.
-
2.发明授权Magnetoacoustic position sensor employing pulse code sequence generators and detectors 失效采用脉冲码序列发生器和探测器的磁声位置传感器
公开(公告)号：US4319189A
公开(公告)日：1982-03-09
申请号：US53659
申请日：1979-06-29
摘要： Using a sonic delay line approach, the distance of a point from the ends of a wire is measured by the time required for an acoustic pulse to move along a wire. A magnetostrictive wire extends between its endpoints with several magnetic pickup coils connected in series located at each end of the wire which are adapted to pick up an encoded train of magnetoacoustic signals. A position signalling electromagnetic drive head can be moved along the coil to any desired position. The head can be pulsed electrically to produce an appropriate sequence of acoustic pulses in the magnetostrictive wire. When those pulses are received by an appropriate sequence of coils connected in series which are properly connected (plus and minus), a large pulse is produced at one time position of the waves as they pass through the sequence of coils. Otherwise, a small signal is produced while the pulses pass by. The drive head comprises a Barker sequence coil which produces 3, 7, or 11 pulses in a Barker sequence, which gives a maximum positive autocorrelation, with an output of less than zero for all other positions of the sequence of pulses as they pass through a series of coils. This large output signal is used in conjunction with a timer to provide position measurement. By placing detectors at both ends of the wire, it is possible to provide self-calibration against thermal and other drifts in accuracy and to provide immediate warning of noisy or invalid readings.
摘要翻译： 使用声音延迟线方法，通过声波脉冲沿导线移动所需的时间来测量点与线末端的距离。 磁致伸缩线在其端点之间延伸，其中几个磁性拾取线圈串联连接，位于线的每一端，其适于拾取编码的磁声信号序列。 位置信号电磁驱动头可以沿着线圈移动到任何期望的位置。 磁头可以是电脉冲的，以在磁致伸缩导线中产生合适的声脉冲序列。 当这些脉冲被适当连接（正，负）的串联连接的适当的线圈序列接收时，当它们通过线圈序列时，在波的一个时间位置产生大的脉冲。 否则，当脉冲通过时产生小信号。 驱动头包括Barker序列线圈，其产生Barker序列中的3,7或11个脉冲，其给出最大正自相关，其中当脉冲序列通过一个脉冲的脉冲序列的所有其它位置的输出小于零时 系列线圈。 该大输出信号与定时器结合使用以提供位置测量。 通过将检测器放置在导线的两端，可以精确地对热和其他漂移进行自校准，并提供噪声或无效读数的即时警告。
-
公开(公告)号：US4291406A
公开(公告)日：1981-09-22
申请号：US64223
申请日：1979-08-06
CPC分类号： H04L1/0054
摘要： A sequential decoder for error correction on burst and random noise channels using convolutionally encoded data. The decoder interacts with a deinterleaver which time demultiplexes data from a data channel from its time multiplexed form into a predetermined transformed order. The decoder includes a memory for storing a table of likelihood values which are derived from known error statistics about the data channel such as the probabilities of random errors and burst errors, burst error severity and burst duration. The decoder removes an encoded subblock of data from the deinterleaver and enters it into a replica of the convolutional encoder which calculates a syndrome bit from a combination of the presently received subblock together with a given number of previous subblocks. The syndrome bit indicates if the current assumption of the path through the convolutional tree is correct. Where there is no error in the channel, then the received sequence is a code word and the syndrome bit indicates that the correct path in the convolution tree is taken. For each received bit, and indicator bit is calculated which is a function of the difference between the current path and the received sequence. The sequential decoder employs the syndrome bit together with burst indicator bits to calculate a table address in a table of likelihood values and error pattern values. The likelihood value is used to update a total likelihood of error value and the error pattern value is used to change the received subblock of data.
摘要翻译： 使用卷积编码数据的脉冲串和随机噪声信道上的纠错序列解码器。 解码器与解交织器交互，该解交织器将数据信道的数据从其时间复用形式分离成预定的变换顺序。 解码器包括存储器，用于存储从关于数据信道的已知误差统计导出的似然值表，例如随机错误和突发错误，突发错误严重性和突发持续时间的概率。 解码器从解交织器中去除编码的数据子块，并将其输入卷积编码器的副本，该卷积编码器从当前接收到的子块的组合与给定数量的先前子块计算校正子位。 校正位指示当前假设通过卷积树的路径是否正确。 在通道中没有错误的情况下，接收到的序列是一个代码字，而校正位指示采用卷积树中的正确路径。 对于每个接收到的位，并且计算指示符位，其是当前路径和接收到的序列之间的差的函数。 顺序解码器将奇偶校验位与突发指示符位一起使用以计算似然值和误差模式值表中的表地址。 似然值用于更新错误值的总可能性，并且使用错误模式值来改变所接收的数据子块。
-
公开(公告)号：US4247912A
公开(公告)日：1981-01-27
申请号：US959960
申请日：1978-11-13
CPC分类号： G11C19/0883 , G11C19/0808
摘要： In magnetic bubble domain chips using layers of crystalline material having in-plane magnetization for propagation, hard bubble suppression, etc., asymmetric propagation often results due to crystalline anisotropies in the layer of in-plane magnetization. In these chips, different propagation margins result for propagation in different directions with respect to the crystalline axes of the in-plane layer. In the present magnetic chip, a plurality of shift registers is provided for movement of bubble domains in a plurality of directions, all of which provide good propagation margins. The registers are aligned in particular directions with respect to the directions of easy stripout of bubble domains in order to avoid the problem of asymmetric propagation. Examples are shown using ion implanted contiguous element propagation patterns organized in a major/minor loop type of storage organization.
摘要翻译： 在使用具有面内磁化的结晶材料层用于传播，硬气泡抑制等的磁性气泡区域芯片中，由于平面内磁化层中的晶体各向异性，常常导致不对称传播。 在这些芯片中，不同的传播裕度导致相对于平面内层的晶轴在不同方向传播。 在本磁芯中，提供多个移位寄存器用于在多个方向上移动气泡畴，所有这些均提供良好的传播裕度。 为了避免不对称传播的问题，寄存器相对于容易脱除气泡区域的方向在特定方向上排列。 示例使用以主/次循环类型的存储组织组织的离子注入的连续元件传播模式。
-
-
-
搜索结果
4 条记录 (耗时 0.015 秒)
