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公开(公告)号：US20050083091A1
公开(公告)日：2005-04-21
申请号：US10984250
申请日：2004-11-09
申请人： Kadaba Lakshmikumar , Gong Gu
发明人： Kadaba Lakshmikumar , Gong Gu
CPC分类号： H03K5/1565 , H03K5/082
摘要： Circuits for adjusting the duty cycle of a clock(s) signal include a negative feedback loop for applying an offset signal to the uncorrected clock signal(s). The offset signal, which corresponds to a duty cycle error of the corrected clock signal(s), adjusts the slicing level of the uncorrected clock signal(s) to cause the duty cycle error to converge toward a predetermined value, for example, zero. The techniques may be used to adjust the duty cycle error of differential clock signals as well as single-ended clock signals.
摘要翻译： 用于调整时钟信号的占空比的电路包括用于向未校正的时钟信号施加偏移信号的负反馈回路。 对应于校正的时钟信号的占空比误差的偏移信号调整未校正的时钟信号的限幅电平，以使占空比误差朝向例如零的预定值收敛。 这些技术可用于调整差分时钟信号的占空比误差以及单端时钟信号。
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公开(公告)号：US20100073063A1
公开(公告)日：2010-03-25
申请号：US12557584
申请日：2009-09-11
IPC分类号： H03K5/08
CPC分类号： H03K19/018528 , H03H7/09 , H03H7/42 , H04L25/0264 , H04L25/028 , H04L25/4902
摘要： Included are embodiments of a 3-level line driver. At least one embodiment of a method includes generating a repetitive wave; receiving an input signal and a complement of the input signal; providing a 3-level output signal; and filtering a feedback signal, the means for filtering including at least one of the following: a 0th order filter, and an even order filter.
摘要翻译： 包括3级线路驱动器的实施例。 方法的至少一个实施例包括产生重复波; 接收输入信号和输入信号的补码; 提供3级输出信号; 并且对反馈信号进行滤波，所述用于滤波的装置包括以下中的至少一个：第0阶滤波器和偶次阶滤波器。
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3.发明申请公开(公告)号：US20080061893A1
公开(公告)日：2008-03-13
申请号：US11853394
申请日：2007-09-11
IPC分类号： H03K3/03
CPC分类号： H03K3/0315 , H03K3/354 , H03K2005/0013 , H03K2005/00143
摘要： Systems and methods for implementing a temperature compensated two-stage ring oscillator are described. At least one embodiment includes a system for generating a clock signal comprising a self-starting oscillator comprising two delay stages in a ring configuration. The two-stage ring oscillator is configured to generate the clock signal, wherein the delay stages are configured such that the two-stage ring oscillator has a single right-half plane (RHP) pole in each of the two delay stages where feedback is always positive.For some embodiments, the system further comprises a compensation module configured to sense temperature and process variations and adjust a supply voltage for the two-stage ring oscillator to compensate for temperature and process variations in order to maintain a constant frequency clock signal. For such embodiments, the compensation module comprises a replica circuit configured to mirror operation of the n-channel devices within the two-stage ring oscillator. The compensation module further comprises a constant gm circuit configured to provide a biasing current to the replica circuit, wherein the replica circuit receives the biasing current to generate a reference voltage. The compensation module further comprises a voltage regulator configured to receive the reference voltage from the replica circuit, wherein the voltage regulator is further configured to provide a supply voltage to the two-stage ring oscillator.
摘要翻译： 描述了用于实现温度补偿的两级环形振荡器的系统和方法。 至少一个实施例包括用于产生包括自启动振荡器的时钟信号的系统，该自启动振荡器包括环形配置中的两个延迟级。 两级环形振荡器被配置为产生时钟信号，其中延迟级被配置为使得两级环形振荡器在两个延迟级中的每一个中具有单个右半平面（RHP）极，其中反馈总是 正。 对于一些实施例，系统还包括补偿模块，其被配置为感测温度和过程变化并且调整用于两级环形振荡器的电源电压以补偿温度和过程变化，以便保持恒定的时钟信号。 对于这样的实施例，补偿模块包括被配置为镜像两级环形振荡器内的n沟道器件的操作的复制电路。 补偿模块还包括被配置为向复制电路提供偏置电流的恒定电路，其中复制电路接收偏置电流以产生参考电压。 所述补偿模块还包括被配置为从所述复制电路接收所述参考电压的电压调节器，其中所述电压调节器进一步被配置为向所述两级环形振荡器提供电源电压。
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公开(公告)号：US08344761B2
公开(公告)日：2013-01-01
申请号：US12557584
申请日：2009-09-11
IPC分类号： H03B1/00
CPC分类号： H03K19/018528 , H03H7/09 , H03H7/42 , H04L25/0264 , H04L25/028 , H04L25/4902
摘要： Included are embodiments of a 3-level line driver. At least one embodiment of a method includes generating a repetitive wave; receiving an input signal and a complement of the input signal; providing a 3-level output signal; and filtering a feedback signal, the means for filtering including at least one of the following: a 0th order filter, and an even order filter.
摘要翻译： 包括3级线路驱动器的实施例。 方法的至少一个实施例包括产生重复波; 接收输入信号和输入信号的补码; 提供3级输出信号; 并且对反馈信号进行滤波，所述用于滤波的装置包括以下中的至少一个：第0阶滤波器和偶次阶滤波器。
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5.发明授权Systems for implementing a temperature and process compensated two-stage ring oscillator 有权用于实现温度和过程补偿的两级环形振荡器的系统公开(公告)号：US07701301B2
公开(公告)日：2010-04-20
申请号：US11853394
申请日：2007-09-11
CPC分类号： H03K3/0315 , H03K3/354 , H03K2005/0013 , H03K2005/00143
摘要： Systems and methods for implementing a temperature compensated two-stage ring oscillator are described. At least one embodiment includes a system for generating a clock signal comprising a self-starting oscillator comprising two delay stages in a ring configuration. The two-stage ring oscillator is configured to generate the clock signal, wherein the delay stages are configured such that the two-stage ring oscillator has a single right-half plane (RHP) pole in each of the two delay stages where feedback is always positive.For some embodiments, the system further comprises a compensation module configured to sense temperature and process variations and adjust a supply voltage for the two-stage ring oscillator to compensate for temperature and process variations in order to maintain a constant frequency clock signal. For such embodiments, the compensation module comprises a replica circuit configured to mirror operation of the n-channel devices within the two-stage ring oscillator. The compensation module further comprises a constant gm circuit configured to provide a biasing current to the replica circuit, wherein the replica circuit receives the biasing current to generate a reference voltage. The compensation module further comprises a voltage regulator configured to receive the reference voltage from the replica circuit, wherein the voltage regulator is further configured to provide a supply voltage to the two-stage ring oscillator.
摘要翻译： 描述了用于实现温度补偿的两级环形振荡器的系统和方法。 至少一个实施例包括用于产生包括自启动振荡器的时钟信号的系统，该自启动振荡器包括环形配置中的两个延迟级。 两级环形振荡器被配置为产生时钟信号，其中延迟级被配置为使得两级环形振荡器在两个延迟级中的每一个中具有单个右半平面（RHP）极，其中反馈总是 正。 对于一些实施例，系统还包括补偿模块，其被配置为感测温度和过程变化并且调整用于两级环形振荡器的电源电压以补偿温度和过程变化，以便保持恒定的时钟信号。 对于这样的实施例，补偿模块包括被配置为镜像两级环形振荡器内的n沟道器件的操作的复制电路。 补偿模块还包括被配置为向复制电路提供偏置电流的恒定gm电路，其中复制电路接收偏置电流以产生参考电压。 所述补偿模块还包括被配置为从所述复制电路接收所述参考电压的电压调节器，其中所述电压调节器进一步被配置为向所述两级环形振荡器提供电源电压。
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