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    • 21. 发明授权
    • Phase locked loop with low steady state phase errors and calibration circuit for the same
    • 具有低稳态相位误差的锁相环和相同的校准电路
    • US06897691B2
    • 2005-05-24
    • US10437906
    • 2003-05-15
    • Chih-Cheng ChenTse-Hsiang Hsu
    • Chih-Cheng ChenTse-Hsiang Hsu
    • H03L7/081H03L7/089H03L7/18H03L7/00
    • H03L7/0891H03L7/081H03L7/18
    • A phase locked loop (PLL) with low steady state phase errors utilizes a delay unit to delay an input signal or a reference clock so as to lower the steady state phase errors of the PLL. A calibration circuit is used to adjust the delay time of the delay unit and includes a signal generator for generating a simulation input signal and a simulation reference clock according to a phase locked clock; a delay unit for delaying the simulation reference clock and generating a delayed reference clock; a phase detector for detecting the phase error between the simulation input signal and the delayed reference clock and generating charge control signals; a charge pump and an integrator for generating an error voltage according to the charge control signals; a delay time control unit for adjusting the delay time of the delay unit according to the error voltage; and a voltage control oscillator for generating the oscillation clock according to a reference control voltage.
    • 具有低稳态相位误差的锁相环(PLL)利用延迟单元来延迟输入信号或参考时钟,以降低PLL的稳态相位误差。 校准电路用于调整延迟单元的延迟时间,并包括用于根据锁相时钟产生模拟输入信号和模拟参考时钟的信号发生器; 延迟单元,用于延迟模拟参考时钟并产生延迟的参考时钟; 相位检测器,用于检测模拟输入信号和延迟的参考时钟之间的相位误差,并产生电荷控制信号; 电荷泵和用于根据充电控制信号产生误差电压的积分器; 延迟时间控制单元,用于根据误差电压调整延迟单元的延迟时间; 以及用于根据参考控制电压产生振荡时钟的电压控制振荡器。
    • 22. 发明授权
    • Apparatus for calibrating a charge pump and method therefor
    • 用于校准电荷泵的装置及其方法
    • US06850102B2
    • 2005-02-01
    • US10253650
    • 2002-09-25
    • Tse-Hsiang HsuChih-Cheng Chen
    • Tse-Hsiang HsuChih-Cheng Chen
    • H03L7/089H03L7/18H03L7/06
    • H03L7/0895H03L7/18
    • A signal calibration apparatus of a charge pump minimizes a current from the charge pump. The signal calibration apparatus includes a detecting circuit, a current adjusting circuit, and a calibrating circuit, wherein the detecting circuit is coupled to the charge pump for outputting a detecting signal according to the direction and magnitude of the current, the current adjusting circuit is coupled to the detecting circuit for outputting a calibrating signal according to the polarity and magnitude of the slew rate for the detection signal; and the calibrating circuit, which consists of a first calibration current source and a second calibration current source, is respectively coupled to the charge pump and the current adjusting circuit for adjusting the first current and the second current by outputting a first calibrating current and second calibrating current to the charge pump.
    • 电荷泵的信号校准装置使来自电荷泵的电流最小化。 信号校准装置包括检测电路,电流调节电路和校准电路,其中检测电路耦合到电荷泵,用于根据电流的方向和幅度输出检测信号,电流调节电路耦合 检测电路,用于根据检测信号的转换速率的极性和大小输出校准信号; 并且由第一校准电流源和第二校准电流源组成的校准电路分别耦合到电荷泵和电流调节电路,用于通过输出第一校准电流和第二校准电流来调节第一电流和第二电流 电流到电荷泵。
    • 26. 发明授权
    • Method and apparatus for enabling fast clock phase locking in a phase-locked loop
    • 用于在锁相环中实现快速时钟相位锁定的方法和装置
    • US07263154B2
    • 2007-08-28
    • US10680636
    • 2003-10-07
    • Tse-Hsiang HsuDing-Jen LiuJong-Woei ChenChih-Cheng Chen
    • Tse-Hsiang HsuDing-Jen LiuJong-Woei ChenChih-Cheng Chen
    • H03D1/24H03L7/06
    • G11B20/10009G11B27/3027G11B2220/216G11B2220/2575H03L7/081H03L7/10
    • In a method and apparatus for enabling fast clock phase locking in a phase-locked loop, a sampling clock generator generates sampling clock signals in response to an oscillator output of the phase-locked loop. A detector unit samples an input digital signal to the phase-locked loop at clock edges of the sampling clock signals to obtain multiple sampling points of the input digital signal, and compares logic levels of each temporally adjacent pair of the sampling points to detect presence of a logic level transition in the input digital signal. A selector unit is controlled by the detector unit to select one of the sampling clock signals, which has one of the clock edges thereof defining an interval that was detected to have occurrence of the logic level transition in the input digital signal, and which is subsequently provided to the phase-locked loop as an input phase-locking clock signal.
    • 在用于在锁相环中实现快速时钟相位锁定的方法和装置中,采样时钟发生器响应于锁相环的振荡器输出产生采样时钟信号。 检测器单元在采样时钟信号的时钟边沿将输入数字信号采样到锁相环,以获得输入数字信号的多个采样点,并且比较每个时间上相邻的采样点对的逻辑电平,以检测 输入数字信号中的逻辑电平转换。 选择器单元由检测器单元控制,以选择一个采样时钟信号,其中一个采样时钟信号的时钟边沿之一限定了被检测为在输入数字信号中出现逻辑电平转换的间隔,随后 提供给锁相环作为输入锁相时钟信号。
    • 27. 发明授权
    • Apparatus for calibrating a charge pump and method therefor
    • 用于校准电荷泵的装置及其方法
    • US06998891B2
    • 2006-02-14
    • US11010420
    • 2004-12-14
    • Tse-Hsiang HsuChih-Cheng Chen
    • Tse-Hsiang HsuChih-Cheng Chen
    • H03L7/06
    • H03L7/0895H03L7/18
    • A signal calibration apparatus of a charge pump minimizes a current from the charge pump. The signal calibration apparatus includes a detecting circuit, a current adjusting circuit, and a calibrating circuit, wherein the detecting circuit is coupled to the charge pump for outputting a detecting signal according to the direction and magnitude of the current, the current adjusting circuit is coupled to the detecting circuit for outputting a calibrating signal according to the polarity and magnitude of the slew rate of the detecting signal; and the calibrating circuit, which consists of a first calibration current source and a second calibration current source, is respectively coupled to the charge pump and the current adjusting circuit for adjusting the first current and the second current by outputting a first calibrating current and second calibrating current to the charge pump.
    • 电荷泵的信号校准装置使来自电荷泵的电流最小化。 信号校准装置包括检测电路,电流调节电路和校准电路,其中检测电路耦合到电荷泵,用于根据电流的方向和幅度输出检测信号,电流调节电路耦合 检测电路,用于根据检测信号的转换速率的极性和大小输出校准信号; 并且由第一校准电流源和第二校准电流源组成的校准电路分别耦合到电荷泵和电流调节电路,用于通过输出第一校准电流和第二校准电流来调节第一电流和第二电流 电流到电荷泵。
    • 29. 发明授权
    • Semiconductor memory device with function of equalizing voltage of dataline pair
    • 具有均衡数据线对电压功能的半导体存储器件
    • US06229744B1
    • 2001-05-08
    • US09429402
    • 1999-10-28
    • Chuan-Cheng HsiaoChih-Cheng ChenHon-Shing Lau
    • Chuan-Cheng HsiaoChih-Cheng ChenHon-Shing Lau
    • G11C700
    • G11C7/1048
    • A semiconductor memory device with a function of equalizing voltages of dataline pair. After turning off the word line and before turning on the equalization means, the datalines are precharged and discharged to a supplied voltage and ground, respectively. Using the theory of uniform distribution of charges, the datalines are equalized into VCC/2, that is, a half of the source supply voltage. The interference on a weak voltage VCC/2 generator within the equalization means during the equalization mode is thus avoided. The equalization of voltages on the dataline pair can be achieved within a transient cycle. Complete data can thus be written or read before the next command is given.
    • 具有均衡数据线对电压的功能的半导体存储器件。 在关闭字线之后,并且在打开均衡装置之前,数据线被预先充电并分别放电到所提供的电压和接地。 使用电荷均匀分布理论,将数据量均衡为VCC / 2,即源电源电压的一半。 因此避免了在均衡模式期间对均衡装置内的弱电压VCC / 2发生器的干扰。 数据线对上的电压均衡可以在瞬态周期内实现。 因此,在给出下一个命令之前,可以写入或读取完整的数据。