公开(公告)号：US07035365B2

公开(公告)日：2006-04-25

申请号：US10001712

申请日：2002-03-11

申请人： Hiroshi Takatori ,  James M. Little ,  Scott Chiu

发明人： Hiroshi Takatori ,  James M. Little ,  Scott Chiu

IPC分类号： H04L7/00 ,  H04L7/02

CPC分类号： H04L1/205

摘要： A receiver involved in high-speed data transmission includes a decision system. The decision system calculates a value of an input signal and holds the value as a tentative value. The decision system calculates an error value, amplifies the error value, and holds the amplified error value as a corrected value. The decision system determines whether the amplified error value is within a marginal range. The decision system also determines whether adjacent values to the value indicate the input signal was in transition from a positive to negative state, or a negative to positive state. If the amplified error values is within a marginal range and the input signal was in transition from a positive to negative state, or a negative to positive state, then the decision system overrides the tentative value with the corrected value.

公开(公告)号：US20050094723A1

公开(公告)日：2005-05-05

申请号：US10954137

申请日：2004-09-28

申请人： Hiroshi Takatori

发明人： Hiroshi Takatori

IPC分类号： G06F20060101 ,  H03K5/159

CPC分类号： H03H17/0607 ,  H03H17/0227 ,  H03H17/06 ,  H03H21/0012 ,  H03H21/0067 ,  H03H2017/0297 ,  H03H2218/025 ,  H04L25/03057 ,  H04L25/03885 ,  H04L25/4921

摘要： Finite impulse response filters are commonly used in high speed data communications electronics for reducing error rates in multilevel symbol encoding schemes. Schemes such as pulse amplitude modulation and quadrature amplitude modulation may have higher error rates for symbols with low signal to noise ratios. By selectively updating the tap coefficients of the filter based on the symbols received, a more robust, accurate filter can be built.

摘要翻译： 有限脉冲响应滤波器通常用于高速数据通信电子设备中，用于降低多电平符号编码方案中的误码率。 诸如脉冲幅度调制和正交幅度调制的方案对于具有低信噪比的符号可能具有较高的误码率。 通过基于所接收的符号选择性地更新滤波器的抽头系数，可以构建更鲁棒，精确的滤波器。

公开(公告)号：US06707868B1

公开(公告)日：2004-03-16

申请号：US09291136

申请日：1999-04-12

申请人： John R. Camagna ,  James Ward Girardeau, Jr. ,  Stanley K. Ling ,  Hiroshi Takatori

发明人： John R. Camagna ,  James Ward Girardeau, Jr. ,  Stanley K. Ling ,  Hiroshi Takatori

IPC分类号： H04L700

CPC分类号： H04L7/0058 ,  H04L25/0202 ,  H04L2025/03471

摘要： A digital timing recovery system wherein the rate conversion is independent of the sampling rate, and which may be set in a network mode or a remote mode. The invention includes a transceiver core for processing transmit and receive data at a predetermined baud rate, an analog front end for transmitting and receiving analog signals over a network, a phase detector for generating a phase error estimate and a timing controller for receiving the phase error estimate signal and generating a receive and transmit phase control signal for controlling timing of the analog front end. A selector is provided for selecting a remote mode of operation or a network mode of operation. The analog front end further includes a transmit converter for converting the transmit data at the baud rate to a digital output at a transmit rate and a digital to analog converter for converting the digital output to an analog signal, and an analog to digital converter for converting the analog receive signal to a digital receive signal and a receive converter for converting the digital receive signal at a receive rate to the baud rate. The phase detector includes a channel estimator for generating a coefficient error signal and the timing controller includes a loop filter for producing a control signal for a numerically controlled oscillator that produces a baud interrupt signal and the phase control signals.

摘要翻译： 数字定时恢复系统，其中速率转换独立于采样速率，并且其可以被设置在网络模式或远程模式中。 本发明包括用于以预定波特率处理发送和接收数据的收发机核心，用于通过网络发送和接收模拟信号的模拟前端，用于产生相位误差估计的相位检测器和用于接收相位误差的定时控制器 估计信号并产生用于控制模拟前端的定时的接收和发送相位控制信号。 提供选择器用于选择远程操作模式或网络操作模式。 模拟前端还包括发送转换器，用于将波特率的发送数据以发送速率转换为数字输出，以及用于将数字输出转换为模拟信号的数模转换器，以及用于转换的模数转换器 到数字接收信号的模拟接收信号和用于以接收速率将数字接收信号转换成波特率的接收转换器。 相位检测器包括用于产生系数误差信号的信道估计器，并且定时控制器包括用于产生用于产生波特率中断信号和相位控制信号的数控振荡器的控制信号的环路滤波器。

公开(公告)号：US4687998A

公开(公告)日：1989-08-18

申请号：US759865

申请日：1985-07-29

申请人： Hiroshi Takatori ,  Toshiro Suzuki ,  Osamu Matsubara ,  Izuru Yamada

发明人： Hiroshi Takatori ,  Toshiro Suzuki ,  Osamu Matsubara ,  Izuru Yamada

IPC分类号： H03K4/02 ,  H03K5/04 ,  H03K5/22 ,  H03K5/159 ,  H03K5/00

CPC分类号： H03K4/023

摘要： A pulse generating circuit is provided for generating a pulse having a time width synchronized with an input pulse and corresponding to a reference voltage. The circuit is particularly designed not to be affected by parasitic capacitance. A circuit for charging one electrode of an integrating circuit with a constant current is controlled by turning on or off a switch in response to the input pulse. The other electrode of the integrating capacitor is connected with a reference voltage source by driving a switch in response to a pulse having a pulse width which contains the time period of the input pulse and which is wider than the input pulse. A comparator is provided for comparing the potential at one electrode of the integrating capacitor and ground potential. A desired pulse is generated by a logic circuit which is receives both the output of the comparator and the input pulse.

公开(公告)号：US08827501B2

公开(公告)日：2014-09-09

申请号：US13328654

申请日：2011-12-16

申请人： Hiroshi Takatori

发明人： Hiroshi Takatori

IPC分类号： F21V5/00 ,  F21V5/04 ,  F21Y101/02 ,  F21Y103/00 ,  F21S4/00

摘要： A light emitting device that can reduce the illuminance unevenness on an illuminated surface. First light flux controlling member 103 controls the distribution of light emitted from light emitting element 102. Second light flux controlling member 105 has second incidence surface 201 onto which the light emitted from first light flux controlling member 103 is incident and second emission surface 202 that is located on a side opposite to second incidence surface 201 and emits the light incident from second incidence surface 201. Also, at least one surface of second incidence surface 201 and second emission surface 202 refracts the light having an optical path on a virtual cross-section including optical axis P1 of light emitting element 102 and being incident onto second incidence surface 201 or second emission surface 202 more to the optical axis P1 side than when being incident onto a plane perpendicular to optical axis P1.

公开(公告)号：US08706042B2

公开(公告)日：2014-04-22

申请号：US13464708

申请日：2012-05-04

申请人： Hiroshi Takatori

发明人： Hiroshi Takatori

IPC分类号： H04B1/00

CPC分类号： H04L7/0037 ,  H04L5/1423

摘要： A network component comprising a transmitter configured to transmit data at a transmitter phase, a receiver configured to receive data at a receiver, and a phase delay component coupled to the transmitter and the receiver and configured to control the transmitter phase relative to the receiver phase to maintain distortion in the transmitted data below a threshold, wherein the threshold is less than a maximum possible distortion in the transmitted data.

摘要翻译： 一种网络组件，包括被配置为在发射机阶段发送数据的发射机，被配置为在接收机处接收数据的接收机以及耦合到所述发射机和所述接收机的相位延迟分量，并被配置为相对于所述接收机相位控制所述发射机相位 将发送的数据中的失真维持在阈值以下，其中阈值小于发送数据中的最大可能失真。

公开(公告)号：US07675968B2

公开(公告)日：2010-03-09

申请号：US10954137

申请日：2004-09-28

申请人： Hiroshi Takatori ,  Chien-Hsin Lee

发明人： Hiroshi Takatori ,  Chien-Hsin Lee

IPC分类号： H03H7/30

CPC分类号： H03H17/0607 ,  H03H17/0227 ,  H03H17/06 ,  H03H21/0012 ,  H03H21/0067 ,  H03H2017/0297 ,  H03H2218/025 ,  H04L25/03057 ,  H04L25/03885 ,  H04L25/4921

摘要： Finite impulse response filters are commonly used in high speed data communications electronics for reducing error rates in multilevel symbol encoding schemes. Schemes such as pulse amplitude modulation and quadrature amplitude modulation may have higher error rates for symbols with low signal to noise ratios. By selectively updating the tap coefficients of the filter based on the symbols received, a more robust, accurate filter can be built.

摘要翻译： 有限脉冲响应滤波器通常用于高速数据通信电子设备中，用于降低多电平符号编码方案中的误码率。 诸如脉冲幅度调制和正交幅度调制的方案对于具有低信噪比的符号可能具有较高的误码率。 通过基于所接收的符号选择性地更新滤波器的抽头系数，可以构建更鲁棒，精确的滤波器。

公开(公告)号：US20050099216A1

公开(公告)日：2005-05-12

申请号：US10938139

申请日：2004-09-10

申请人： Kenneth Dyer ,  Hiroshi Takatori

发明人： Kenneth Dyer ,  Hiroshi Takatori

IPC分类号： H03K5/01 ,  H03K5/135 ,  H04B20060101 ,  H04L7/00 ,  H04L25/02 ,  H04L25/08

CPC分类号： H03K5/135 ,  H04L25/0272 ,  H04L25/0292 ,  H04L25/08

摘要： High speed data transmission schemes often use differential lines to reduce the effect of noise on the data signal. Unfortunately, the signal propagation on the positive and negative lines may be different, which leads to a signal skew problem. This document describes a novel way of compensating for differential line skew in data transmission lines.

摘要翻译： 高速数据传输方案通常使用差分线路来减少噪声对数据信号的影响。 不幸的是，正负线上的信号传播可能不同，这导致信号偏斜问题。 本文介绍了一种补偿数据传输线路中的差分线偏移的新方法。

公开(公告)号：US06865588B2

公开(公告)日：2005-03-08

申请号：US10037656

申请日：2002-01-03

申请人： Stanley K. Ling ,  Hiroshi Takatori

发明人： Stanley K. Ling ,  Hiroshi Takatori

IPC分类号： H04L25/03 ,  G06F17/10

CPC分类号： H04L25/03038 ,  H04L2025/03477 ,  H04L2025/03617 ,  H04L2025/03681

摘要： In one embodiment of the invention, a tap-leakage generator includes an error filter and an updater. The error filter filters a decision error provided by the adaptive filter using a leakage factor. The adaptive filter has N taps. The updater updates N equalizer coefficients to the N taps using the filtered decision error. The updater receives N equalizer data from the N taps.

摘要翻译： 在本发明的一个实施例中，抽头泄漏发生器包括错误滤波器和更新器。 误差滤波器使用泄漏因子滤除由自适应滤波器提供的判决误差。 自适应滤波器具有N个抽头。 更新器使用滤波的决策误差将N个均衡器系数更新为N个抽头。 更新器从N个抽头接收N个均衡器数据。

公开(公告)号：US06640194B2

公开(公告)日：2003-10-28

申请号：US10001649

申请日：2001-10-31

申请人： James M. Little ,  Hiroshi Takatori ,  Scott Chiu

发明人： James M. Little ,  Hiroshi Takatori ,  Scott Chiu

IPC分类号： G01R1300

CPC分类号： H03L7/093 ,  H03L7/091

摘要： A frequency detector includes a slicer to receive and slice a phase error against a compare threshold value. The slicer generates a symbol based on the phase error sliced against the compare threshold value. A symbol counter is provided to increment a symbol count if the symbol generated is the same as a last symbol. A logic circuit compares the symbol count with a symbol count limit if the symbol is different from the last symbol. The logic circuit increments a high counter and clears a low counter if the symbol count is less than the symbol count limit. The logic circuit increments the low counter and clears the high counter if the symbol count is greater than the symbol count limit. A combinational logic circuit is provided to generate a high frequency jitter true signal or a high frequency jitter false signal based on at least one of the symbol count, the high counter, and the low counter.

摘要翻译： 频率检测器包括限幅器，用于根据比较阈值接收和切片相位误差。 限幅器基于相对于比较阈值切片的相位误差产生符号。 如果产生的符号与最后一个符号相同，则提供符号计数器来增加符号计数。 如果符号与最后一个符号不同，则逻辑电路将符号计数与符号计数限制进行比较。 如果符号计数小于符号计数限制，逻辑电路会增加一个高计数器并清除一个低计数器。 如果符号数大于符号计数限制，逻辑电路会递增低计数器并清除高计数器。 提供组合逻辑电路，用于基于符号计数，高计数器和低计数器中的至少一个产生高频抖动真实信号或高频抖动假信号。