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    • 22. 发明授权
    • Controllable delay line and regulation compensation circuit thereof
    • 可控延迟线及其调节补偿电路
    • US07564285B2
    • 2009-07-21
    • US11754783
    • 2007-05-29
    • Chia-Wei ChangYeong-Jar Chang
    • Chia-Wei ChangYeong-Jar Chang
    • H03H11/26
    • H03H11/265
    • A controllable delay line includes an anti-jitter unit, a dependent current source, a first current mirror, a second current mirror, a regulation capacitor, a compensation capacitor and an output buffer unit. The anti-jitter unit receives a first bias voltage and produces a second bias voltage based on the first bias voltage. When the voltage source used in the controllable delay line has a variation, the second bias voltage varies therewith. The regulation capacitor is used for reducing the variation of the voltage difference between the voltage source and a node voltage of the first current source. The compensation capacitor is used for reducing the influence of a transition of the input signal of the output buffer unit on the node voltage, so as to lower the jitter amount of the output signal of the output buffer unit.
    • 可控延迟线包括抗抖动单元,依赖电流源,第一电流镜,第二电流镜,调节电容器,补偿电容器和输出缓冲器单元。 抗抖动单元接收第一偏置电压并且基于第一偏置电压产生第二偏置电压。 当在可控延迟线中使用的电压源具有变化时,第二偏置电压随之变化。 调节电容器用于减小电压源与第一电流源的节点电压之间的电压差的变化。 补偿电容器用于减小输出缓冲器单元的输入信号对节点电压的转变的影响,以便降低输出缓冲器单元的输出信号的抖动量。
    • 25. 发明申请
    • SAMPLE AND HOLD CIRCUIT AND RELATED DATA SIGNAL DETECTING METHOD UTILIZING SAMPLE AND HOLD CIRCUIT
    • 采样和保持电路及相关数据信号检测方法利用样品和保持电路
    • US20090072869A1
    • 2009-03-19
    • US11854560
    • 2007-09-13
    • Jen-Chien HsuHung-Wen LuChau-Chin SuYeong-Jar Chang
    • Jen-Chien HsuHung-Wen LuChau-Chin SuYeong-Jar Chang
    • G11C27/02
    • G11C27/024G11C27/026
    • Disclosed is a sample and hold circuit for detecting a parameter of a data signal, which includes: a first switching module, wherein the sample and hold circuit samples the data signal according to the turning on or off of the first switching module; at least one capacitor, coupled to the first switching module; a second switching module, coupled to the capacitor; a controllable reference voltage source, for providing a first reference voltage to charge/discharge the capacitor via the second switching module according to a control signal; a first comparator, coupled to the capacitor, for comparing a voltage drop on the capacitor and the first reference voltage to generate a first comparing result; and a control circuit, coupled to the controllable reference voltage source and the first comparator, for generating the control signal according to the comparing results.
    • 公开了一种用于检测数据信号的参数的采样和保持电路,其包括:第一开关模块,其中所述采样和保持电路根据所述第一开关模块的导通或关断对所述数据信号进行采样; 耦合到所述第一开关模块的至少一个电容器; 耦合到所述电容器的第二开关模块; 可控参考电压源,用于提供第一参考电压,以根据控制信号经由第二开关模块对电容器充电/放电; 耦合到电容器的第一比较器,用于比较电容器上的电压降和第一参考电压以产生第一比较结果; 以及耦合到可控参考电压源和第一比较器的控制电路,用于根据比较结果产生控制信号。
    • 26. 发明授权
    • Sample and hold circuit and related data signal detecting method utilizing sample and hold circuit
    • 采样保持电路及相关数据信号检测方法利用采样保持电路
    • US07495479B1
    • 2009-02-24
    • US11854560
    • 2007-09-13
    • Jen-Chien HsuHung-Wen LuChau-Chin SuYeong-Jar Chang
    • Jen-Chien HsuHung-Wen LuChau-Chin SuYeong-Jar Chang
    • H03K17/00
    • G11C27/024G11C27/026
    • Disclosed is a sample and hold circuit for detecting a parameter of a data signal, which includes: a first switching module, wherein the sample and hold circuit samples the data signal according to the turning on or off of the first switching module; at least one capacitor, coupled to the first switching module; a second switching module, coupled to the capacitor; a controllable reference voltage source, for providing a first reference voltage to charge/discharge the capacitor via the second switching module according to a control signal; a first comparator, coupled to the capacitor, for comparing a voltage drop on the capacitor and the first reference voltage to generate a first comparing result; and a control circuit, coupled to the controllable reference voltage source and the first comparator, for generating the control signal according to the comparing results.
    • 公开了一种用于检测数据信号的参数的采样和保持电路,其包括:第一开关模块,其中所述采样和保持电路根据所述第一开关模块的导通或关断对所述数据信号进行采样; 耦合到所述第一开关模块的至少一个电容器; 耦合到所述电容器的第二开关模块; 可控参考电压源,用于提供第一参考电压,以根据控制信号经由第二开关模块对电容器充电/放电; 耦合到电容器的第一比较器,用于比较电容器上的电压降和第一参考电压以产生第一比较结果; 以及耦合到可控参考电压源和第一比较器的控制电路,用于根据比较结果产生控制信号。
    • 30. 发明申请
    • BUILT-IN JITTER MEASUREMENT CIRCUIT
    • 内置抖动测量电路
    • US20090096439A1
    • 2009-04-16
    • US11870113
    • 2007-10-10
    • Jen-Chien HsuHung-Wen LuChau-Chin SuYeong-Jar Chang
    • Jen-Chien HsuHung-Wen LuChau-Chin SuYeong-Jar Chang
    • G01R29/26G01R23/12
    • G01R29/26G01R31/31709
    • A jitter measurement circuit and a method for calibrating the jitter measurement circuit are disclosed. The jitter measurement circuit includes a synchronous dual-phase detector and a decision circuit. In a test mode, a probability distribution function (PDF) of the jitter of a clock signal output by a circuit under test is obtained. In a calibration mode, a random clock, which is externally generated or generated by a free-run oscillator in the circuit under test, is used to calibrate the synchronous dual-phase detector. The decision circuit performs logic operations, data latching and counting on a phase relationship detected by the synchronous dual-phase detector in order to obtain a counting value and a PDF relative to the jitter of the clock signal.
    • 公开了抖动测量电路和校准抖动测量电路的方法。 抖动测量电路包括同步双相检测器和判定电路。 在测试模式中,获得由被测电路输出的时钟信号的抖动的概率分布函数(PDF)。 在校准模式中,由被测电路中的自由振荡器外部产生或产生的随机时钟用于校准同步双相检测器。 决定电路对由同步双相检测器检测的相位关系进行逻辑运算,数据锁存和计数,以获得相对于时钟信号的抖动的计数值和PDF。