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公开(公告)号：US07478257B2
公开(公告)日：2009-01-13
申请号：US10403145
申请日：2003-03-31
IPC分类号： G06F1/00
CPC分类号： H04L7/0337
摘要： According to some embodiments an apparatus comprising a vote generator, a vote governor, and a local clock controller is provided. The vote generator generates votes based on a local clock signal and transitions in a stream of received data. The vote governor receives the generated votes and discards at least some of the votes. The local clock controller adjusts the local clock signal based on a generated vote that has not been discarded.
摘要翻译： 根据一些实施例，提供了一种包括投票发生器，投票管理器和本地时钟控制器的装置。 投票生成器基于本地时钟信号生成投票并在接收的数据流中进行转换。 投票总监收到所产生的投票，并至少丢弃一些投票。 本地时钟控制器根据未被丢弃的生成的投票来调整本地时钟信号。
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2.发明授权公开(公告)号：US07280629B2
公开(公告)日：2007-10-09
申请号：US10969737
申请日：2004-10-19
CPC分类号： H04L25/068 , H03D3/006 , H04L7/005 , H04L7/0331
摘要： Conventional receiver architectures are based on either frequency/phase tracking or oversampling. Both receiver types typically employ sensitive analog circuits, which create noise, consume power and utilize valuable space in their implementation. The invention adopts a novel approach to phase/frequency tracking that utilizes the edges or zero crossings of the input data waveform to effectively track the remote transmitter clock phase/frequency. This methodology minimizes the use of analog circuitry, thereby reducing the noise domain and the substrate space required for implementation of a tracking device.
摘要翻译： 传统的接收机架构基于频率/相位跟踪或过采样。 两种接收机类型通常采用灵敏的模拟电路，它们产生噪声，消耗功率并在其实现中利用有价值的空间。 本发明采用新颖的相位/频率跟踪方法，利用输入数据波形的边缘或过零点有效跟踪远程发射机时钟相位/频率。 该方法最大限度地减少了模拟电路的使用，从而降低了实现跟踪设备所需的噪声区域和衬底空间。
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3.发明授权Method and apparatus for a tracking data receiver compensating for deterministic jitter 有权跟踪数据接收机补偿确定性抖动的方法和装置公开(公告)号：US06765975B2
公开(公告)日：2004-07-20
申请号：US09741319
申请日：2000-12-19
IPC分类号： H04L2536
CPC分类号： H04L7/0338 , H04L7/033
摘要： A tracking data receiver which can compensate for deterministic jitter is disclosed. The device utilizes a history of past data received to determine which of multiple samples taken within a bit period to utilize. Due to deterministic jitter that can occur in data signal communication, the delay of waveform development varies with the ratio of 0's to 1's transmitted prior to the bit period being observed. The present invention exploits the predictable nature of the deterministic jitter to decide which sample to choose.
摘要翻译： 公开了可补偿确定性抖动的跟踪数据接收机。 该设备利用接收到的过去数据的历史来确定在一个位周期内采用的多个样本中的哪个采样。 由于可能发生在数据信号通信中的确定性抖动，波形发展的延迟随着观察到比特周期之前发送的0到1的比率而变化。 本发明利用确定性抖动的可预测性来决定要选择哪个样本。
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公开(公告)号：US06446235B1
公开(公告)日：2002-09-03
申请号：US09386474
申请日：1999-08-31
IPC分类号： G06F1110
CPC分类号： H04L1/0061 , H03M13/09 , H04L1/0041
摘要： An error detection technique uses a cumulative error detecting code (such as a cumulative CRC checksum or the like). At the source node (transmitter side) an error detecting code of a previous cell is stored. The next cell to be transmitted is received and the error detecting code of the previous cell is appended to the next cell. A next error detecting code is calculated as a function of at least a portion of the next cell to be transmitted and the previous error detecting code appended thereto. The previous error detecting code appended to the next cell is replaced with the next error detecting code, and the next cell including the next error detecting code appended thereto is transmitted. In this manner, the cumulative error detecting code is calculated over the current cell and a previous error detecting code. Thus, the cumulative error detecting code can be used to detect bit errors in each individual cell as well as to detect one or more missing or dropped cells.
摘要翻译： 错误检测技术使用累积检错码（如累积CRC校验和等）。 在源节点（发射机侧），存储先前小区的错误检测码。 接收到要发送的下一个小区，并将上一个小区的错误检测码追加到下一个小区。 根据要发送的下一个小区的至少一部分和附加的先前的错误检测码，计算下一个错误检测码。 附加到下一个单元的先前错误检测码被下一个错误检测码替换，并且发送包括附加在其上的下一个检错码的下一个单元。 以这种方式，在当前小区和先前的错误检测码上计算累积检错码。 因此，可以使用累积检错码来检测每个单独的单元中的位错误，以及检测一个或多个丢失或丢弃的单元。
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5.发明授权公开(公告)号：US07113562B1
公开(公告)日：2006-09-26
申请号：US09749270
申请日：2000-12-27
CPC分类号： H04L25/068 , H03D3/006 , H04L7/005 , H04L7/0331
摘要： Conventional receiver architectures are based on either frequency/phase tracking or oversampling. Both receiver types typically employ sensitive analog circuits, which create noise, consume power and utilize valuable space in their implementation. The invention adopts a novel approach to phase/frequency tracking that utilizes the edges or zero crossings of the input data waveform to effectively track the remote transmitter clock phase/frequency. This methodology minimizes the use of analog circuitry, thereby reducing the noise domain and the substrate space required for implementation of a tracking device.
摘要翻译： 传统的接收机架构基于频率/相位跟踪或过采样。 两种接收机类型通常采用灵敏的模拟电路，它们产生噪声，消耗功率并在其实现中利用有价值的空间。 本发明采用新颖的相位/频率跟踪方法，利用输入数据波形的边缘或过零点有效跟踪远程发射机时钟相位/频率。 该方法最大限度地减少了模拟电路的使用，从而降低了实现跟踪设备所需的噪声区域和衬底空间。
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公开(公告)号：US06917659B1
公开(公告)日：2005-07-12
申请号：US09749269
申请日：2000-12-27
CPC分类号： H04L7/0054 , H04L7/005 , H04L7/0337
摘要： A method of recovering data from a modulated data signal includes tracking a transmitted clock with a plurality of locally-generated clock phases, estimating an average phase of previously detected edges, registering a pulse edge in the received stream of data at a transition phase corresponding to one of the plurality of locally-generated clock phases, determining whether a first symbol was received multiple times consecutively prior to the registered pulse edge, and using the determination of whether the first symbol was received multiple times consecutively in a receiver decision process.
摘要翻译： 从调制数据信号恢复数据的方法包括利用多个本地生成的时钟相位跟踪传输的时钟，估计先前检测到的边沿的平均相位，在所接收的数据流中在对应于 所述多个本地生成的时钟相位中的一个，确定在所述注册的脉冲沿之前连续地多次接收到第一符号，并且使用在所述接收机决定处理中是否连续地接收到所述第一符号的确定。
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公开(公告)号：US06885715B1
公开(公告)日：2005-04-26
申请号：US09124642
申请日：1998-07-29
申请人： Jie Ni , Richard S. Jensen
发明人： Jie Ni , Richard S. Jensen
CPC分类号： H04L7/041
摘要： Briefly, in accordance with one embodiment of the invention, a method of synchronizing two ends of a bi-directional network communication path includes the following. A sequence of predetermined characters are repeatedly transmitted from an end of a bi-directional network communication path if reception is lost at that end. Synchronization or resynchronization occurs from both ends if the sequence of predetermined characters is received at the other end.
摘要翻译： 简而言之，根据本发明的一个实施例，同步双向网络通信路径的两端的方法包括以下。 如果在该端丢失接收，则从双向网络通信路径的一端重复发送预定字符序列。 如果在另一端接收到预定字符的顺序，则从两端发生同步或重新同步。
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公开(公告)号：US06781434B2
公开(公告)日：2004-08-24
申请号：US10247752
申请日：2002-09-19
IPC分类号： H03K1730
CPC分类号： G11C27/024 , G11C27/026 , H03K17/162
摘要： A switch circuit having low charge dumping characteristics includes multiple parallel connected switching transistors and one or more associated cancellation transistors. The switching transistors perform basic switching functions within the switch circuit in response to a digital signal. During transitions of the digital signal, the switching transistors dump charge on an output node thereof due to parasitic capacitances within the devices. The cancellation transistor(s) dumps charge of an opposite polarity on the output node to cancel the charge dumped by the switching transistors. Two switching transistors are used for each cancellation transistor so that equal sized devices can be used throughout the switch circuit.
摘要翻译： 具有低电荷倾倒特性的开关电路包括多个并联的开关晶体管和一个或多个相关联的消除晶体管。 开关晶体管响应于数字信号在开关电路内执行基本的开关功能。 在数字信号的转换期间，开关晶体管由于器件内的寄生电容而在其输出节点上转储电荷。 消除晶体管在输出节点处转移相反极性的电荷，以消除由开关晶体管倾倒的电荷。 两个开关晶体管用于每个消除晶体管，使得在整个开关电路中可以使用等大小的器件。
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公开(公告)号：US07054374B1
公开(公告)日：2006-05-30
申请号：US09752813
申请日：2000-12-29
CPC分类号： H04L5/1423 , H04L7/0079 , H04L7/0087 , H04L7/0338
摘要： When signaling over cables or other media having significant return impedance, it is generally more efficient to use two conductors to carry two simultaneous bi-directional signals differentially, rather than utilizing unidirectional communications. Bi-directional communications increases the aggregate bandwidth of a pair of conductors. A conversion circuit converts unidirectional signaling between an edge-based receiver and a transmitter to simultaneous differential bi-directional signaling. A receiver for receiving data includes an edge processor operative to make decisions using edges of a received data stream and a communication circuit coupled to the edge processor. The communication circuit is operative to convert communications with the edge processor from a first format, such as unidirectional signaling, to a second format, such as differential bi-directional signaling.
摘要翻译： 当通过电缆或具有显着回波阻抗的其它介质发信号时，使用两个导体差分地携带两个同时的双向信号通常更有效，而不是利用单向通信。 双向通信增加了一对导体的总带宽。 转换电路将基于边缘的接收机和发射机之间的单向信令转换为同步差分双向信令。 用于接收数据的接收机包括边缘处理器，其可操作以使用接收到的数据流的边缘和耦合到边缘处理器的通信电路进行判定。 通信电路可操作以将与边缘处理器的通信从诸如单向信令的第一格式转换为诸如差分双向信令的第二格式。
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公开(公告)号：US06943606B2
公开(公告)日：2005-09-13
申请号：US09891466
申请日：2001-06-27
申请人： Davied S. Dunning , Chamath Abhayagunawardhana , Ken Drottar , Richard S. Jensen , Robert Glenn
发明人： Davied S. Dunning , Chamath Abhayagunawardhana , Ken Drottar , Richard S. Jensen , Robert Glenn
CPC分类号： H03L7/0814 , H03K5/13 , H03K2005/00286
摘要： A phase interpolator interpolates between a plurality of clock phases using a plurality of switching legs coupled to a common output. Each switching leg includes a pair of differential switching transistors each having a gate and two additional terminals, one of which is coupled to said common output. The gates are coupled to respective ones of the plurality of clock phases and their complements. Tails couple the other terminals of said switching transistors to ground. Each tail made up of a plurality of transistors. A load coupling the common output to a voltage.
摘要翻译： 相位插值器使用耦合到公共输出的多个开关支路在多个时钟相位之间内插。 每个开关支路包括一对差分开关晶体管，每个具有栅极和两个附加端子，其中一个连接到所述公共输出端。 门耦合到多个时钟相位中的相应时钟相位及其补码。 尾部将所述开关晶体管的其它端子耦合到地。 每个尾部由多个晶体管组成。 将公共输出耦合到电压的负载。
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