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1. 发明授权

US07116744B2 Clock recovery circuit and receiver circuit for improving the error rate of signal reproduction 有权
公开(公告)号：US07116744B2
公开(公告)日：2006-10-03
申请号：US09978726
申请日：2001-10-18
申请人： Takuya Saze , Hirotaka Tamura , Takaya Chiba , Kohtaroh Gotoh , Hideki Ishida
发明人： Takuya Saze , Hirotaka Tamura , Takaya Chiba , Kohtaroh Gotoh , Hideki Ishida
IPC分类号： H04L25/00 , H03L7/06
CPC分类号： G11C7/1087 , G11C7/1078 , G11C7/222 , H03L7/0812 , H03L7/091 , H04L7/033 , H04L7/0337
摘要： A clock recovery circuit has a boundary detection/discrimination circuit to detect and discriminate a boundary in an input signal in accordance with a first signal. The clock recovery circuit performs clock recovery by controlling the timing of the first signal in accordance with the detected boundary, wherein boundary detection timing in the boundary detection/discrimination circuit is varied by controlling the first signal.

2. 发明授权

US07038520B2 Timing signal generating circuit and receiver circuit designed to speed up signal transmission 有权
标题翻译：定时信号发生电路和接收机电路，旨在加速信号传输
公开(公告)号：US07038520B2
公开(公告)日：2006-05-02
申请号：US10721911
申请日：2003-11-26
申请人： Takaya Chiba , Hirotaka Tamura
发明人： Takaya Chiba , Hirotaka Tamura
IPC分类号： G06F1/04
CPC分类号： H04L25/0292 , G06F1/04 , H03K2005/00286 , H03L7/0812
摘要： A timing signal generating circuit receives a plurality of input signals of differing phases and generates a timing signal having a phase intermediate therebetween. The timing signal generating circuit has a plurality of current polarity switching circuits, and a voltage level correction circuit. Each of the current polarity switching circuits is provided between a plurality of current sources and acts to switch an output current polarity in accordance with a corresponding one of the input signals. The voltage level correction circuit corrects the voltage level of a phase-combined signal produced by combining weighted outputs of the plurality of current polarity switching circuits.
摘要翻译：定时信号发生电路接收多个不同相位的输入信号，并产生其中间相位的定时信号。定时信号发生电路具有多个电流极性切换电路和电压电平校正电路。每个电流极性切换电路设置在多个电流源之间，并且用于根据相应的一个输入信号切换输出电流极性。电压电平校正电路通过组合多个电流极性开关电路的加权输出而产生的相位合成信号的电压电平。

3. 发明授权

US07173466B2 Timing signal generating circuit having simple configuration with low supply voltage and generating timing signals with high accuracy 有权
标题翻译：定时信号发生电路具有电源电压低的结构简单，准确度高的定时信号
公开(公告)号：US07173466B2
公开(公告)日：2007-02-06
申请号：US10347913
申请日：2003-01-22
申请人： Takaya Chiba , Hirotaka Tamura
发明人： Takaya Chiba , Hirotaka Tamura
IPC分类号： H03H11/16
CPC分类号： H03K5/13 , H04L7/0025 , H04L7/0337
摘要： A timing signal generating circuit receives multiphase input signals and generates a signal having a phase intermediate therebetween, and weighting is applied to the multi-phase input signals by using a variable impedance circuit. The timing signal generating circuit (receiver circuit) can operate with a low supply voltage, is simple in configuration, and can generate timing signals with high accuracy.
摘要翻译：定时信号发生电路接收多相输入信号并产生其间具有相位的信号，并通过使用可变阻抗电路对多相输入信号加权。定时信号发生电路（接收电路）可以以低电源电压工作，配置简单，可以高精度地产生定时信号。

4. 发明授权

US5955921A Signal amplifier circuit 失效
标题翻译：信号放大电路
公开(公告)号：US5955921A
公开(公告)日：1999-09-21
申请号：US910002
申请日：1997-08-11
申请人： Satoshi Ide , Hiroyuki Nobuhara , Takaya Chiba
发明人： Satoshi Ide , Hiroyuki Nobuhara , Takaya Chiba
IPC分类号： H03G3/30 , H03F3/45
CPC分类号： H03G3/3084
摘要： The present invention discloses a signal amplifier circuit used in, for example, a receive portion in an optical communication system, and including an automatic threshold value setting portion to automatically set a threshold value depending upon a "1" side level and a "0" side level of an input signal, an automatic gain control amplifying portion to take as inputs the input signal and the threshold value from the automatic threshold value setting portion so as to perform differential amplification, and a gain control portion to detect amplitude information of the input signal so as to feed a gain control signal according to amplitude of the input signal to the automatic gain control amplifying portion as a feedforward signal. It is thereby possible to avoid limitation of a signal amplified in the signal amplifier circuit at a time of reproduction of a pulse signal, and compensate for offsets present in circuits so as to suppress a variation in pulse width of the output signal.
摘要翻译：本发明公开了一种信号放大器电路，例如在光通信系统中使用的接收部分，并且包括根据“1”侧电平和“0”自动设定阈值的自动阈值设定部，输入信号的侧面电平，自动增益控制放大部分，从自动阈值设定部分输入输入信号和阈值以进行差分放大;以及增益控制部分，用于检测输入信号的幅度信息信号，以便根据输入信号的幅度将增益控制信号馈送到自动增益控制放大部分作为前馈信号。因此，可以避免在再现脉冲信号时在信号放大器电路中放大的信号的限制，并补偿存在于电路中的偏移，以便抑制输出信号的脉冲宽度的变化。

5. 发明授权

US5923219A Automatic threshold control circuit and signal amplifying circuit for amplifying signals by compensating for low-frequency response of photodetector 失效
标题翻译：自动阈值控制电路和信号放大电路，用于通过补偿光电检测器的低频响应来放大信号
公开(公告)号：US5923219A
公开(公告)日：1999-07-13
申请号：US912688
申请日：1997-08-18
申请人： Satoshi Ide , Takaya Chiba
发明人： Satoshi Ide , Takaya Chiba
IPC分类号： H03K5/08 , H04L25/03 , H03F17/00
CPC分类号： H03K5/082
摘要： An automatic threshold control circuit includes a bottom detection circuit, a relative peak detection circuit, and a voltage divider circuit. The bottom detection circuit detects an absolute minimum level of an input signal, and the relative peak detection circuit detects, in accordance with the input signal, a maximum level relative to the minimum level detected by the absolute bottom detection circuit. Further, the voltage divider circuit generates a threshold level by dividing the absolute minimum level and the relative maximum level in a predetermined ratio. Using this configuration, a signal amplifying circuit can be constructed that is capable of accurately reproducing digital signals at all times regardless of variations in the amplitude or the DC level of the input signal.
摘要翻译：自动阈值控制电路包括底部检测电路，相对峰值检测电路和分压器电路。底部检测电路检测输入信号的绝对最小电平，并且相对峰值检测电路根据输入信号检测相对于由绝对底部检测电路检测到的最小电平的最大电平。此外，分压器电路通过以绝对最小电平和相对最大电平除以预定比例来产生阈值电平。使用该配置，可以构造能够始终如一地准确地再现数字信号而不管输入信号的幅度或DC电平的变化如何的信号放大电路。

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