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    • 2. 发明授权
    • Clock jitter measurement circuit and integrated circuit having the same
    • 时钟抖动测量电路和集成电路相同
    • US07945404B2
    • 2011-05-17
    • US12108796
    • 2008-04-24
    • Jung-Chi HoSheng-Bin LinYeong-Jar Chang
    • Jung-Chi HoSheng-Bin LinYeong-Jar Chang
    • G01R23/00G06F19/00
    • G01R29/26G01R31/3016G01R31/31709
    • Provided is a measurement circuit for measuring a jitter of a clock signal. Delay elements delay the clock signal into delayed clock signal. Latches latch the delayed clock signals to indicate whether transition edges of the clock signal is within a window value which is corresponding to delays of the delay elements. Based on the latch result from the latches, a finite state machine generates control signals for controlling the delay elements. If the latch result indicates that the transition edges of the clock signal is not within the window value, the control signals adjust the delays of the delay elements and the window value. The jitter of the clock signal is measured based on the delays of the delay elements and the window value.
    • 提供了一种用于测量时钟信号的抖动的测量电路。 延迟元件将时钟信号延迟到延迟的时钟信号。 锁存器锁存延迟的时钟信号以指示时钟信号的转换边沿是否在对应于延迟元件的延迟的窗口值内。 基于锁存器的锁存结果,有限状态机产生用于控制延迟元件的控制信号。 如果锁存结果指示时钟信号的转换边缘不在窗口值内,则控制信号调整延迟元件的延迟和窗口值。 基于延迟元件的延迟和窗口值来测量时钟信号的抖动。
    • 3. 发明申请
    • METHOD AND TECHNIQUE FOR ANALOGUE CIRCUIT SYNTHESIS
    • 模拟电路合成的方法与技术
    • US20100031206A1
    • 2010-02-04
    • US12512086
    • 2009-07-30
    • Chang-Chung WuChi-Che ChenJung-Chi HoWoei-Tzy JongYeong-Jar Chang
    • Chang-Chung WuChi-Che ChenJung-Chi HoWoei-Tzy JongYeong-Jar Chang
    • G06F17/50
    • G06F17/5063
    • Method and technique for analogue circuit synthesis. An analogue circuit usually includes many circuit components, and characteristics and functions of each circuit component are controlled by many corresponding parameters. In the presented invention, selected key design parameters of selected critical circuit components, as well as optimization targets, design specification or/and design constraint, are transformed into an optimization plan, and an optimization engine iterates circuit level or system level numerical simulations by changing values of the selected key design parameters recorded in the optimization plan, so as to find optimized parameters and circuit components which allow the analogue circuit to match the design specification/constraint and to approach the optimization target. Thus a systematic automation for analogue circuit synthesis/design/optimization is achieved.
    • 模拟电路合成的方法和技术。 模拟电路通常包括许多电路元件,并且每个电路元件的特性和功能由许多相应的参数控制。 在本发明中,所选择的关键电路组件的选择的关键设计参数以及优化目标,设计规范或/和设计约束被转换成优化计划,优化引擎通过改变电路级或系统级数值模拟来迭代 所选择的关键设计参数的值被记录在优化计划中,以便找到允许模拟电路匹配设计规范/约束并且接近优化目标的优化参数和电路组件。 因此,实现了模拟电路合成/设计/优化的系统自动化。
    • 9. 发明申请
    • Calibration method for mixed-mode simulation
    • 混合模式模拟的校准方法
    • US20070244686A1
    • 2007-10-18
    • US11481846
    • 2006-07-07
    • Yaong-Jar ChangYung-Chieh LinJung-Chi HoPei-Wen Luo
    • Yaong-Jar ChangYung-Chieh LinJung-Chi HoPei-Wen Luo
    • G06F17/50
    • G06F17/5036
    • A calibration method of a mixed mode simulation calibrates standard delay times in a standard delay format and includes obtaining a digital output circuit from a digital circuit, obtaining an analog output circuit from an analog circuit, performing a simulation on the digital output circuit connected to the analog output circuit to obtain an ideal output, obtaining a first delay time according to the standard delay times of the digital output circuit, performing a calibrative analog-to-digital mixed mode simulation using the first delay time to obtain an analog-to-digital mixed output, comparing the ideal output and the analog-to-digital mixed output to calibrate the first delay time, and calibrating the standard delay times of the digital output circuit according to the calibrated first delay time.
    • 混合模式模拟的校准方法以标准延迟格式校准标准延迟时间,并且包括从数字电路获得数字输出电路,从模拟电路获得模拟输出电路,对连接到模拟电路的数字输出电路执行仿真 模拟输出电路以获得理想输出,根据数字输出电路的标准延迟时间获得第一延迟时间,使用第一延迟时间执行校准模数混合模式仿真,以获得模数转换 混合输出,比较理想输出和模数混合输出以校准第一延迟时间,并根据校准的第一延迟时间校准数字输出电路的标准延迟时间。