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    • 7. 发明专利
    • Output buffer circuit having de-emphasis function
    • 具有去激活功能的输出缓冲电路
    • JP2007060073A
    • 2007-03-08
    • JP2005240775
    • 2005-08-23
    • Nec Electronics CorpNecエレクトロニクス株式会社
    • TANAKA MAKOTO
    • H04L25/03H03K19/0175H04L25/02
    • H04L25/0286H04L25/0272
    • PROBLEM TO BE SOLVED: To provide a circuit capable of reducing the number of circuit elements and enabling low power consumption by optimizing the entire circuit including a pre-buffer.
      SOLUTION: The circuit is provided with output buffers (13, 11) for main data; an output buffer (12) for de-emphasis; and a selector (14) which performs switching control so that a control signal SELECT indicating de-emphasis setting and de-emphasis non-setting is input, main data are input into the output buffer (12) for de-emphasis to operate the buffer as an output buffer for main data when the control signal show the de-emphasis non-setting, emphasis data obtained by delaying the main data by a delay circuit (15) are input into the output buffer (12) for de-emphasis to operate the buffer as an output buffer for de-emphasis when the control signal shows the de-emphasis setting.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种能够通过优化包括预缓冲器的整个电路来减少电路元件数量并实现低功耗的电路。 电路设有用于主数据的输出缓冲器(13,11)。 用于去加重的输出缓冲器(12) 以及选择器(14),其执行切换控制,使得输入指示去加重设置和去加重非设置的控制信号SELECT,主数据被输入到用于去加重的输出缓冲器(12)中以操作缓冲器 作为用于主数据的输出缓冲器,当控制信号示出去加重非设置时,通过延迟电路(15)将主数据延迟而获得的强调数据被输入到输出缓冲器(12)中以进行去加重操作 当控制信号显示去加重设置时,缓冲器作为用于去加重的输出缓冲器。 版权所有(C)2007,JPO&INPIT
    • 8. 发明专利
    • Circuitry and method for programmably adjusting duty cycle of serial data signal
    • 用于编程调整串行数据信号占空比的电路和方法
    • JP2007037133A
    • 2007-02-08
    • JP2006201042
    • 2006-07-24
    • Altera Corpアルテラ コーポレイションAltera Corporation
    • SHUMARAYEV SERGEY YURYEVICHPATEL RAKESH
    • H04L25/03H04L25/02
    • G06F13/4086H03K5/1565H04L25/0274H04L25/0286H04L25/0292
    • PROBLEM TO BE SOLVED: To provide a programmable duty cycle adjustment circuitry suitable for correcting duty-cycle distortions for a data signal caused by a transmission medium.
      SOLUTION: The programmable duty cycle adjustment circuitry (306a, 306b; 404a, 404b) can be provided to correct duty cycle distortion in serial data transmission systems. The duty cycle adjustment can be executed prior to transmitting data signals via the transmission medium (104). The duty cycle adjustment can also be executed when data signals are received from the transmission medium. The programmable duty cycle adjustment circuitry can be configured so as to adjust the rising and falling of the data signals. The programmable duty cycle adjustment circuitry can also be configured so as to adjust the common mode level of the data signals. The amount of the duty cycle adjustment can be determined by end-users or via negative feedback.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种可编程占空比调整电路,其适用于校正由传输介质引起的数据信号的占空比失真。 解决方案:可以提供可编程占空比调整电路(306a,306b; 404a,404b)以校正串行数据传输系统中的占空比失真。 可以在通过传输介质(104)发送数据信号之前执行占空比调整。 当从传输介质接收到数据信号时,也可以执行占空比调整。 可编程占空比调整电路可以配置为调整数据信号的上升和下降。 可编程占空比调整电路也可以配置成调整数据信号的共模电平。 占空比调整的量可以由最终用户或负反馈来确定。 版权所有(C)2007,JPO&INPIT