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11.发明申请公开(公告)号：US20090261870A1
公开(公告)日：2009-10-22
申请号：US12105280
申请日：2008-04-18
CPC分类号： H03K3/0315
摘要： A power-on detection circuit for detecting a minimum operational frequency includes: an oscillating circuit, which includes: a ring oscillator, for generating a first oscillating signal; and a high pass filter for filtering the first oscillating signal to generate a second oscillating signal. The power-on detection circuit also includes a rectification device, coupled to the high pass filter, for generating a logic signal once the second oscillating signal reaches a certain frequency.
摘要翻译： 用于检测最小工作频率的上电检测电路包括：振荡电路，包括：环形振荡器，用于产生第一振荡信号; 以及高通滤波器，用于对第一振荡信号进行滤波以产生第二振荡信号。 上电检测电路还包括耦合到高通滤波器的整流装置，用于在第二振荡信号达到一定频率时产生逻辑信号。
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公开(公告)号：US20090261801A1
公开(公告)日：2009-10-22
申请号：US12105276
申请日：2008-04-18
IPC分类号： G05F3/28
CPC分类号： G05F3/30 , Y10S323/901
摘要： A low-voltage current reference providing a current being substantially constant with temperature includes a low voltage bandgap, a start circuit coupled to the low voltage bandgap, and a current summer coupled to the low voltage bandgap and to the start circuit. The low voltage bandgap is for providing a constant voltage reference, and the start circuit is for starting the low voltage bandgap from a non-start mode and for providing a proportional to absolute temperature (PTAT) current reference. The current summer is for providing a constant current reference according to the constant voltage reference and the PTAT current reference.
摘要翻译： 提供电流与温度基本恒定的低电压电流基准包括低电压带隙，耦合到低电压带隙的启动电路以及耦合到低电压带隙和启动电路的电流加速器。 低电压带隙用于提供恒定的电压基准，起动电路用于从非启动模式启动低电压带隙，并提供与绝对温度（PTAT）电流基准成正比。 目前的夏天是根据恒定电压基准和PTAT电流参考值提供恒定的电流基准。
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公开(公告)号：US20090195073A1
公开(公告)日：2009-08-06
申请号：US12025786
申请日：2008-02-05
CPC分类号： H03K19/00361 , Y10T307/50
摘要： A system for generating an ideal rise or fall time includes: a first current source, for providing a first current; an adjustable capacitive component, coupled to the first current source, for generating an output signal according to a total capacitance controlled by a comparison signal; a signal conversion circuit, coupled to the adjustable capacitive component, for restoring charges stored in the adjustable capacitive component to a predetermined value when a voltage level of the output signal reaches a reference value to generate a clock-like signal; and a comparison circuit, coupled to the signal conversion circuit and the adjustable capacitive component, for comparing a period of the clock-like signal with a reference period of a reference clock signal and generating the comparison signal to adjust the total capacitance of the adjustable capacitive component when periods are not the same.
摘要翻译： 用于产生理想上升或下降时间的系统包括：用于提供第一电流的第一电流源; 耦合到第一电流源的可调电容分量，用于根据由比较信号控制的总电容产生输出信号; 耦合到可调电容部件的信号转换电路，用于当输出信号的电压电平达到参考值以便产生类似时钟的信号时，将存储在可调电容部件中的电荷恢复到预定值; 以及耦合到信号转换电路和可调电容分量的比较电路，用于将时钟状信号的周期与参考时钟信号的参考周期进行比较，并产生比较信号，以调节可调电容的总电容 时间段不一样的组件。
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14.发明授权公开(公告)号：US07750684B2
公开(公告)日：2010-07-06
申请号：US12105280
申请日：2008-04-18
CPC分类号： H03K3/0315
摘要： A power-on detection circuit for detecting a minimum operational frequency includes: an oscillating circuit, which includes: a ring oscillator, for generating a first oscillating signal; and a high pass filter for filtering the first oscillating signal to generate a second oscillating signal. The power-on detection circuit also includes a rectification device, coupled to the high pass filter, for generating a logic signal once the second oscillating signal reaches a certain frequency.
摘要翻译： 用于检测最小工作频率的上电检测电路包括：振荡电路，包括：环形振荡器，用于产生第一振荡信号; 以及高通滤波器，用于对第一振荡信号进行滤波以产生第二振荡信号。 上电检测电路还包括耦合到高通滤波器的整流装置，用于在第二振荡信号达到一定频率时产生逻辑信号。
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15.发明申请Dynamic Voltage Pump Circuit and Method of Dynamically Generating an Output Supply Voltage Thereof 有权动态电压泵电路及动态产生输出电源电压的方法公开(公告)号：US20090237146A1
公开(公告)日：2009-09-24
申请号：US12050178
申请日：2008-03-18
IPC分类号： G05F1/10
CPC分类号： H02M3/07 , H02M2001/007
摘要： A dynamic voltage pump circuit includes a first stage voltage pump, a second stage voltage pump, a limiter, and a comparator. The first stage voltage pump generates an intermediate supply voltage according to an input supply voltage and a pump signal. The second stage voltage pump generates an output supply voltage according to the intermediate supply voltage, the pump signal, and an enable signal; the second stage voltage pump is enabled and disabled when the enable signal is asserted and de-asserted, respectively. The limiter controls the pump signal according to a comparison of the output supply voltage with a first reference voltage. The comparator compares the first reference voltage with a second reference voltage to generate the enable signal, and can assert the enable signal when the desired output supply voltage exceeds the maximum possible intermediate supply voltage generated by the first stage voltage pump.
摘要翻译： 动态电压泵电路包括第一级电压泵，第二级电压泵，限幅器和比较器。 第一级电压泵根据输入电源电压和泵浦信号产生中间电源电压。 第二级电压泵根据中间电源电压，泵浦信号和使能信号产生输出电源电压; 当使能信号分别被断言和解除置位时，第二级电压泵被使能和禁止。 根据输出电源电压与第一参考电压的比较，限幅器控制泵浦信号。 比较器将第一参考电压与第二参考电压进行比较以产生使能信号，并且当期望的输出电源电压超过由第一级电压泵产生的最大可能的中间电源电压时，可以断言使能信号。
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