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    • 33. 发明授权
    • Clock extraction device
    • 时钟提取装置,用于分别具有公共锁相环来提取对应于多个输入端口的不同时钟
    • US06735710B1
    • 2004-05-11
    • US09655717
    • 2000-09-05
    • Takefumi Yoshikawa
    • Takefumi Yoshikawa
    • G06F104
    • H04L7/0337H03L7/0995H04L7/042
    • Incoming serial data is quantized by 3-times oversampling to obtain a first datastream. By the EXOR of adjacent bits in the datastream, a second datastream which specifies transient points in the first datastream is produced from the first datastream. Reference is made to the third bit from each transient point in the second datastream and to bits positioned on each side of the third bit. If there exists no transient point in any one of these two bits, then the third bit is a boundary. On the other hand, if there exists a transient point in either of the two bits, the bit where the transient point exists is a boundary. In this way, a third datastream is produced. Then, the time-series EXOR of the third datastream and a clock bitstream is performed to produce a final clock bitstream.
    • 通过3次过采样对进入的串行数据进行量化以获得第一数据流。 通过数据流中相邻位的EXOR,从第一数据流产生指定第一数据流中的瞬时点的第二数据流。 参考第二个数据流中每个瞬态点的第三位和位于第三位的每一侧的位。 如果在这两个位中的任何一个中不存在瞬态点,则第三位是边界。 另一方面,如果在两个位中的任一位存在瞬态点,则存在瞬态点的位是边界。 以这种方式,产生第三数据流。 然后,执行第三数据流的时间序列EXOR和时钟比特流以产生最终的时钟比特流。
    • 34. 发明授权
    • Data width corrector
    • 数据宽度校正器
    • US06690217B2
    • 2004-02-10
    • US10139327
    • 2002-05-07
    • Takefumi Yoshikawa
    • Takefumi Yoshikawa
    • H03K3017
    • H03K5/1565H04L25/08
    • The data width corrector of the invention adjusts the data width appropriately even for data in which cross points have already deviated at the time of input. A data adjusting buffer changes a differential signal received from outside to single-phase receive data and outputs the receive data. A charge pump compares the average time of the HIGH period between the receive data and latch data latched with a latch clock having the same frequency, and supplies the results to the data adjusting buffer. The data adjusting buffer adjusts the duty of the receive data according to the received comparison results.
    • 本发明的数据宽度校正器即使在输入时交叉点已经偏离的数据也适当地调整数据宽度。 数据调整缓冲器将从外部接收到的差分信号改变为单相接收数据,并输出接收数据。 电荷泵将接收数据和锁存的锁存数据之间的HIGH周期的平均时间与具有相同频率的锁存时钟进行比较,并将结果提供给数据调整缓冲器。 数据调整缓冲器根据接收到的比较结果调整接收数据的占空比。
    • 35. 发明授权
    • Driver circuit for differentially outputting data from internal circuitry of an LSI to outside the LSI
    • 用于从LSI的内部电路将数据差分输出到LSI外部的驱动电路
    • US06686779B2
    • 2004-02-03
    • US10227758
    • 2002-08-27
    • Takefumi Yoshikawa
    • Takefumi Yoshikawa
    • H03K300
    • H04L25/028H03K19/00323H04L25/0272H04L25/0282
    • The driver circuit includes a constant current section, a first pad, a second pad, a first switching element, a second switching element, a first resistor, a second resistor, and a control section. The constant current section outputs a prescribed positive or negative current. The first switching element is connected between an output node of the constant current section and the first pad and turned ON/OFF in response to a first signal. The second switching element is connected between the output node of the constant current section and the second pad and turned ON/OFF in response to a second signal. The second signal is complementary to the first signal. The first resistor is connected between a first node receiving a first voltage and the first pad. The second resistor is connected between the first node and the second node. The control section controls a potential at the output node of the constant current section to a prescribed potential.
    • 驱动电路包括恒流部分,第一焊盘,第二焊盘,第一开关元件,第二开关元件,第一电阻器,第二电阻器和控制部件。 恒定电流部分输出规定的正或负电流。 第一开关元件连接在恒定电流部分的输出节点和第一焊盘之间,并响应于第一信号而导通/截止。 第二开关元件连接在恒定电流部分的输出节点和第二焊盘之间,并响应于第二信号而导通/截止。 第二信号与第一信号互补。 第一电阻器连接在接收第一电压的第一节点和第一电池块之间。 第二电阻器连接在第一节点和第二节点之间。 控制部将恒定电流部的输出节点的电位控制为规定电位。
    • 36. 发明授权
    • Data transmitter
    • 数据发送器
    • US06542552B1
    • 2003-04-01
    • US09468830
    • 1999-12-22
    • Takefumi YoshikawaYutaka Terada
    • Takefumi YoshikawaYutaka Terada
    • H03B300
    • G06F1/10H04L7/0008H04L7/0037H04L7/0091H04L7/04
    • A data transmitter according to the present invention includes driver, transmission line and receiver. The receiver includes a transition pulse generator for generating a transition pulse simultaneously with the transition of a data signal output from the driver. If an edge of an internal clock signal overlaps with the transition pulse being applied, then the receiver does not latch the data signal in synchronism with the edge of the internal clock signal. Instead, the receiver obtains and retains a data value opposite to the previous cycle one. On the other hand, while no transition pulses are being applied, the receiver latches the data signal normally responsive to the internal clock signal. Accordingly, the receiver can always accurately retain the very data transmitted through the transmission line, thus improving the reliability of the data received and realizing high-speed data transmission even if the internal clock signal has lagged with respect to the data signal.
    • 根据本发明的数据发送器包括驱动器,传输线和接收器。 接收机包括转换脉冲发生器,用于与从驾驶员输出的数据信号的转变同时产生转换脉冲。 如果内部时钟信号的边沿与施加的转换脉冲重叠,则接收器不会与内部时钟信号的边沿同步地锁存数据信号。 相反,接收器获得并保留与前一个周期相反的数据值。 另一方面,当没有施加转换脉冲时,接收器通常响应于内部时钟信号来锁存数据信号。 因此,即使内部时钟信号相对于数据信号滞后,接收机总是可以准确地保持通过传输线传输的非常数据,从而提高接收的数据的可靠性并实现高速数据传输。