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11. 发明授权

US07035365B2 Error correction method and apparatus for data transmission system 失效
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.

12. 发明申请

US20050094723A1 Adaptive FIR filter and method 有权
标题翻译：自适应FIR滤波器和方法
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。

13. 发明授权

US4687998A Pulse width generating circuit synchronized with clock signal and corresponding to a reference voltage 失效
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.

14. 发明授权

US08827501B2 Light emitting device and illumination device 有权
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.

15. 发明授权

US08706042B2 Transmit phase control for the echo cancel based full duplex transmission system 有权
标题翻译：用于基于回波消除的全双工传输系统的发射相位控制
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。

16. 发明授权

US07675968B2 Adaptive FIR filter and method 有权
标题翻译：自适应FIR滤波器和方法
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。

17. 发明申请

US20050099216A1 Adaptive per-pair skew compensation method for extended reach differential transmission 失效
标题翻译：用于扩展差分传输的自适应每对偏移补偿方法
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。

18. 发明授权

US06640194B2 Timing jitter frequency detector for timing recovery systems 失效
标题翻译：定时恢复系统的定时抖动频率检测器
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。

19. 发明授权

US5581585A Phase-locked loop timing recovery circuit 失效
标题翻译：锁相环定时恢复电路
公开(公告)号：US5581585A
公开(公告)日：1996-12-03
申请号：US327184
申请日：1994-10-21
申请人： Hiroshi Takatori , Daniel L. Ray , Kenneth G. Buttle , James W. Everitt
发明人： Hiroshi Takatori , Daniel L. Ray , Kenneth G. Buttle , James W. Everitt
IPC分类号： H04L7/00 , H04L7/02 , H04L7/033 , H04L25/03 , H03H7/30 , H03D3/24
CPC分类号： H04L25/03057 , H04L7/0058 , H04L7/0062 , H04L7/0083
摘要： A timing recovery apparatus for recovering the timing from sparse timing information in multi-level or partial response codes. The timing recovery apparatus includes a switch for sampling an incoming line code signal according to a selectable sample rate, a feed forward equalizer for filtering the sampled signal, a decision feedback equalizer for cancelling intersymbol interference in the filtered signal and for recovering the timing in the sampled signal. The timing recovery circuit creates a phase correction signal in response to a signal received from the feed forward equalizer and thereby control the sample rate of the sample switch so that the signal-to-noise ratio at the node before the decision is maximized. The voltage controlled crystal oscillator may be controlled within a certain frequency range by using a second phase detector which compares the phase of the signal controlling the sampling of the incoming line code with a reference clock.
摘要翻译：一种定时恢复装置，用于从多级或部分响应码中的稀疏定时信息中恢复定时。定时恢复装置包括用于根据可选采样率对输入线路码信号进行采样的开关，用于滤波采样信号的前馈均衡器，用于消除滤波信号中的码间干扰的判决反馈均衡器，以及用于恢复滤波信号中的定时采样信号。定时恢复电路响应于从前馈均衡器接收的信号创建相位校正信号，从而控制采样开关的采样率，使得决定之前的节点处的信噪比最大化。通过使用第二相位检测器将压控晶体振荡器控制在一定频率范围内，该第二相位检测器将控制输入线路码的采样的信号的相位与参考时钟进行比较。

20. 发明授权

US5181228A System and method for phase equalization 失效
标题翻译：相位均衡的系统和方法
公开(公告)号：US5181228A
公开(公告)日：1993-01-19
申请号：US596220
申请日：1990-10-12
申请人： Hiroshi Takatori
发明人： Hiroshi Takatori
IPC分类号： H04B3/14 , H04B3/23
CPC分类号： H04B3/235 , H04B3/146
摘要： A phase equalizer in the receiver portion of a bi-directional communication system is disclosed equalizer for reducing precursor intersymbol interference without any substantial degradation in signal to noise ratio. The phase equalizer is implemented as a switched capacitor filter having a clock (switch) rate at least four times the data baud rate and a z-transfer function T(z) of a form: ##EQU1## wherein G, A, and B are fixed but adjustable coefficients.
摘要翻译：公开了双向通信系统的接收机部分中的相位均衡器，用于减少前置码间干扰，而信噪比没有任何明显的降低。相位均衡器被实现为具有至少四倍于数据波特率的时钟（开关）速率和以下形式的z传递函数T（z）的开关电容滤波器：其中G，A和B是固定但可调系数。

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