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    • 1. 发明申请
    • DIGITAL ELECTRONIC DEVICE AND METHOD OF ALTERING CLOCK DELAYS IN A DIGITAL ELECTRONIC DEVICE
    • 数字电子设备及其在数字电子设备中改变时钟延迟的方法
    • US20100231276A1
    • 2010-09-16
    • US12526503
    • 2008-01-31
    • Vincent Huard
    • Vincent Huard
    • H03L7/00
    • H03K5/135G06F1/04H03K5/26H03K2005/00084H03L7/00
    • A digital electronic device is provided with a first and second sequential logic unit (SS1, SS2), each for receiving an input signal (D) and for outputting a first and second output signal (Q, QF), respectively. The electronic device furthermore comprises a comparator unit (C) for comparing the first and second output signals (Q, QF) and an adaptive clock generator unit (ACG) for generating a first and second internal clock (CK, CKF) for the first and second sequential logic unit (SS1, SS2), respectively. In a self-tuning mode, the adaptive clock generator unit (ACG) is adapted to delay the first and second internal clock signals (CK, CKF) with respect to the other internal clock signal (CKF). The delay induced by the adaptive control generator unit (ACG) is dependent on the result of the comparison unit (C). In a normal operation mode the adaptive control generator unit (ACG) is adapted to maintain the delay between the first and second internal clock signals constant.
    • 数字电子设备设置有第一和第二顺序逻辑单元(SS1,SS2),每个用于接收输入信号(D)并分别输出第一和第二输出信号(Q,QF)。 电子设备还包括用于比较第一和第二输出信号(Q,QF)和自适应时钟发生器单元(ACG)的比较器单元(C),用于产生用于第一和第二输出信号的第一和第二内部时钟(CK,CKF) 第二顺序逻辑单元(SS1,SS2)。 在自调谐模式中,自适应时钟发生器单元(ACG)适于相对于另一个内部时钟信号(CKF)延迟第一和第二内部时钟信号(CK,CKF)。 由自适应控制发生器单元(ACG)引起的延迟取决于比较单元(C)的结果。 在正常操作模式中,自适应控制发生器单元(ACG)适于保持第一和第二内部时钟信号之间的延迟恒定。
    • 2. 发明申请
    • Frequency adjustment circuit
    • 频率调节电路
    • US20060033583A1
    • 2006-02-16
    • US11196512
    • 2005-08-04
    • Tetsuya TokunagaHiroyuki AraiTakeshi KimuraRyouichi AndoMamoru Yamaguchi
    • Tetsuya TokunagaHiroyuki AraiTakeshi KimuraRyouichi AndoMamoru Yamaguchi
    • H03L7/00
    • H03K3/0231H03K2005/00084
    • A frequency adjustment circuit that maintains a target frequency even when frequency adjustment data of zapping circuit is changed by an external noise is offered. The frequency adjustment circuit includes a reset signal generation circuit, a frequency adjustment data latch circuit that latches and retains the frequency adjustment data ZP1 and ZP2 generated by a first zapping circuit and a second zapping circuit based on a latch clock ZCLK and a latch clock generation circuit that generates the latch clock ZCLK. The reset signal generation circuit generates a periodic reset signal ZRES that is synchronized with a rise of an enable signal EN generated from an interface circuit. The latch clock generation circuit generates the latch clock ZCLK that is synchronized with a fall of the enable signal EN.
    • 提供即使在由于外部噪声而使切换电路的频率调整数据变化的情况下也能够维持目标频率的频率调整电路。 频率调整电路包括复位信号生成电路,频率调整数据锁存电路,其锁存并保持由第一切换电路产生的频率调整数据ZP 1和ZP 2,以及基于锁存时钟ZCLK和锁存器的第二切换电路 时钟生成电路,生成锁存时钟ZCLK。 复位信号产生电路产生与从接口电路产生的使能信号EN的上升同步的周期性复位信号ZRES。 锁存时钟产生电路产生与使能信号EN的下降同步的锁存时钟ZCLK。
    • 3. 发明申请
    • Auto-calibration method for delay circuit
    • 延迟电路的自动校准方法
    • US20050246596A1
    • 2005-11-03
    • US10986030
    • 2004-11-12
    • Lin ChenSou Chen
    • Lin ChenSou Chen
    • G06K5/04G11B5/00G11B20/20H03H11/26H03K5/00H03K5/13H03L7/00
    • H03K5/131H03K2005/00058H03K2005/00084H03K2005/00156
    • An auto-calibration method is applied to a delay circuit, which includes a plurality of delay chains. One of the delay chains is previously designated as the delay path where data output from the delay circuit passes through. The accumulative number of errors is continuously detected and counted during a unit of time when the delay circuit is in use. If the number of accumulative errors of the designated delay path is larger than a threshold value, the delay circuit scans all the delay chains and records their accumulative error numbers during a unit of time; otherwise, the designated delay path keeps what it do. Afterwards, the number of accumulative errors is compared between all the delay chains to find out which one of the delay chains has a minimum accumulative error number, and the delay chain with a minimum accumulative error number is designated as a new current delay path. Then, the number of accumulative errors of the new designated delay path is continuously observed on whether it is larger than the threshold value. The aforesaid steps are performed again according to the observation.
    • 自动校准方法被应用于包括多个延迟链的延迟电路。 延迟链之一被预先指定为延迟电路输出的数据通过的延迟路径。 在使用延迟电路的时间单位内,连续地检测和计数累积误差数。 如果指定延迟路径的累积误差数大于阈值,则延迟电路扫描所有延迟链,并在一个时间单位内记录其累积误差数; 否则,指定的延迟路径保持它的作用。 之后,在所有的延迟链之间比较累积误差的数量,找出延迟链中哪一个具有最小累积误差数,将具有最小累积误差数的延迟链指定为新的当前延迟路径。 然后,连续观察新的指定延迟路径的累计误差的数量是否大于阈值。 根据观察,再次进行上述步骤。