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1.发明授权公开(公告)号：US06528982B1
公开(公告)日：2003-03-04
申请号：US09697721
申请日：2000-10-27
IPC分类号： G01R2500
CPC分类号： G01R25/00
摘要： A jitter detector obtains a phase difference between input signals as a digital value to make jitter between the signals easily detectable. The jitter detector includes comparison pulse generator, periodic signal generator, counter and arithmetic unit. The comparison pulse generator outputs one phase difference comparison pulse after another. Each phase difference comparison pulse has a width representing the phase difference between first and second input signals. The periodic signal generator outputs a periodic signal every time a value obtained by accumulating the widths of the phase difference comparison pulses exceeds a predetermined value. Receiving the periodic signal and a clock signal with a period shorter than that of the periodic signal, the counter counts the number of pulses of the clock signal during one period of the periodic signal and outputs a resultant count. And the arithmetic unit detects and outputs a variation in the count as jitter between the first and second input signals.
摘要翻译： 抖动检测器获得输入信号之间的相位差作为数字值，使信号之间的抖动容易检测。 抖动检测器包括比较脉冲发生器，周期信号发生器，计数器和算术单元。 比较脉冲发生器输出一个相差差值比较脉冲。 每个相位差比较脉冲具有表示第一和第二输入信号之间的相位差的宽度。 每当通过累加相位差比较脉冲的宽度获得的值超过预定值时，周期性信号发生器输出周期信号。 接收到周期信号和周期信号的周期信号的时钟信号，计数器在周期信号的一个周期内对时钟信号的脉冲数进行计数，并输出结果计数。 并且算术单元检测并输出计数的变化，作为第一和第二输入信号之间的抖动。
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公开(公告)号：US07978013B2
公开(公告)日：2011-07-12
申请号：US12096664
申请日：2006-10-25
申请人： Shiro Dosho , Kazuaki Sogawa , Yuji Yamada , Naoshi Yanagisawa
发明人： Shiro Dosho , Kazuaki Sogawa , Yuji Yamada , Naoshi Yanagisawa
IPC分类号： H03L7/00
CPC分类号： H03L7/0898 , H03L7/093 , H03L7/099 , H03L7/0995 , H03L7/107 , H03L7/183 , H03L2207/06
摘要： A constant determination unit (90) determines various constants, that are the magnitude of a charge current outputted from a charge pump circuit (30), the time constant of a loop filter (40), and the gain of a voltage controlled oscillator (50), so as to make the proportionality constant of a natural frequency of a phase locked loop circuit for the input frequency of the phase locked loop circuit and the damping factor to be predetermined values, and outputs various control signals based on the determined constants. The charge pump circuit (30), the loop filter (40), and the voltage controlled oscillator (50) modify the magnitude of the charge current, the time constant, and the gain, respectively, in accordance with control signals outputted from the constant determination unit (90).
摘要翻译： 常数确定单元（90）确定各种常数，即从电荷泵电路（30）输出的充电电流的大小，环路滤波器（40）的时间常数和压控振荡器（50）的增益 ），以使锁相环电路的输入频率和阻尼因子的锁相环电路的固有频率的比例常数成为预定值，并根据确定的常数输出各种控制信号。 电荷泵电路（30），环路滤波器（40）和压控振荡器（50）根据从常数输出的控制信号分别修正充电电流的大小，时间常数和增益 确定单元（90）。
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3.发明授权Analog memory and image processing system for reducing fixed pattern noise 有权用于减少固定模式噪声的模拟记忆和图像处理系统公开(公告)号：US06559895B1
公开(公告)日：2003-05-06
申请号：US09508447
申请日：2000-03-10
IPC分类号： H04N978
CPC分类号： G11C27/04 , G11C27/024
摘要： Fixed pattern noise of an analog memory is reduced. Transfer paths of an address selection signal (SL) between an address generation unit (10) and respective storage elements (21) for storing an analog signal are constructed to have a substantially uniform electric characteristic in driving the storage elements (21) by the address selection signal (SL) to such an extent that the output signal of the analog memory is free from fixed pattern noise. A buffer unit (50) for temporarily storing and outputting the address selection signal is provided between the address generation unit (10) and the respective storage elements (21), and the buffer unit (50) is constructed to have an output characteristic substantially uniform between the storage elements (21). Also, lines between the buffer unit (50) and the storage elements (21) are constructed to have substantially the same electric characteristic. In this manner, charge feed through noise of the respective storage elements (21) are made substantially uniform, resulting in suppressing the fixed pattern noise.
摘要翻译： 模拟存储器的固定模式噪声降低。 在地址产生单元（10）和用于存储模拟信号的各个存储元件（21）之间的地址选择信号（SL）的传输路径被构造为在通过地址驱动存储元件（21）时具有基本均匀的电特性 选择信号（SL）使得模拟存储器的输出信号没有固定模式噪声的程度。 用于临时存储和输出地址选择信号的缓冲单元（50）设置在地址生成单元（10）和各个存储元件（21）之间，缓冲单元（50）被构造成具有基本均匀的输出特性 在所述存储元件（21）之间。 此外，缓冲单元（50）和存储元件（21）之间的线被构造成具有基本上相同的电特性。 以这种方式，通过各个存储元件（21）的噪声的电荷馈送被制成基本均匀，导致抑制固定图案噪声。
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公开(公告)号：US20050049809A1
公开(公告)日：2005-03-03
申请号：US10915345
申请日：2004-08-11
IPC分类号： G01R31/316 , G01R35/00 , G06F19/00
CPC分类号： G01R35/005 , G01R31/316
摘要： An analog circuit automatic calibration system for calibrating an object circuit that is an analog circuit having a characteristic changing with an input set value. The system includes: a set value storage section for storing a value and outputting the value to the object circuit as the set value; a characteristic detection section for detecting the characteristic of the object circuit; a first characteristic change section for determining the set value so that the characteristic of the object circuit is optimized; a second characteristic change section for updating the set value so that the characteristic of the object circuit is maintained, using an algorithm different from that used in the first characteristic change section; and a selector for selecting either one of the outputs of the first and second characteristic sections to enable the selected one to be stored in the set value storage section.
摘要翻译： 一种模拟电路自动校准系统，用于校准作为具有随着输入设定值变化的特性的模拟电路的目标电路。 该系统包括：设定值存储部分，用于存储值并将该值输出到对象电路作为设定值; 用于检测所述目标电路的特性的特性检测部分; 用于确定所述设定值使得所述对象电路的特性被优化的第一特征变化部分; 第二特征变化部，使用与第一特征变化部中使用的算法不同的算法来更新设定值，使得保持对象电路的特性; 以及选择器，用于选择第一和第二特征部分的输出之一，以使所选择的一个存储在设定值存储部分中。
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公开(公告)号：US5822236A
公开(公告)日：1998-10-13
申请号：US863209
申请日：1997-05-27
CPC分类号： G11C27/04 , G11C27/00 , H03H19/004 , H04N9/78
摘要： The invention provides an analog FIFO memory from which a written analog signal can be accurately read by eliminating errors in the analog signal between the write operation and the read operation. Prior to the read operation for reading the analog signal from a memory cell through a memory bus, a reset operation for setting the memory bus at a predetermined potential is conducted so as to remove a charge stored in a parasitic capacitance of the memory bus. The input terminal of a read circuit is set at a predetermined potential, with a write circuit disconnected from the memory bus by using an input circuit and with the read circuit connected with the memory bus by using an output circuit. In this manner, the memory bus is set at the predetermined potential, and the charge stored in the parasitic capacitance is discharged. At this point, a switch in each memory cell is in an off-state, and hence, a charge corresponding to the analog signal can be retained in the memory cell.
摘要翻译： 本发明提供了一种模拟FIFO存储器，通过消除写入操作和读取操作之间的模拟信号中的错误，可以准确地读取写入的模拟信号。 在从存储器单元通过存储器总线读取模拟信号的读取操作之前，进行用于将存储器总线设置在预定电位的复位操作，以便消除存储在存储器总线的寄生电容中的电荷。 读取电路的输入端子通过使用输入电路和与存储器总线连接的读取电路通过使用输出电路将写入电路从存储器总线断开而被设置在预定电位。 以这种方式，将存储器总线设置在预定电位，并且存储在寄生电容中的电荷被放电。 此时，每个存储单元中的开关处于截止状态，因此可以将与模拟信号相对应的电荷保留在存储单元中。
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公开(公告)号：US06982581B2
公开(公告)日：2006-01-03
申请号：US10713162
申请日：2003-11-17
IPC分类号： H03K3/017
CPC分类号： H03K5/133 , H03K5/1565
摘要： In order to correct the duty cycle of a given clock signal to produce a clock signal with a 50% duty cycle, a duty cycle correction circuit includes a delay unit for delaying a first clock signal to output a second clock signal and a clock-signal output unit. The clock-signal output unit includes two transistors which use the first and second clock signals as the inputs of respective gates and an inverter circuit for inverting a signal output from a common drain of the transistors to output a third clock signal. The delay unit delays the first clock signal so that the first clock signal falling appears at a timing at which the duty cycle thereof becomes 50%. The two transistors in the clock-signal output unit output, as the third clock signal, a ground voltage and a source voltage as the signal from the common drain in response to the rising of the first clock signal and the falling of the second clock signal, respectively.
摘要翻译： 为了校正给定时钟信号的占空比以产生具有50％占空比的时钟信号，占空比校正电路包括用于延迟第一时钟信号以输出第二时钟信号和时钟信号的延迟单元 输出单元。 时钟信号输出单元包括使用第一和第二时钟信号作为各个门的输入的两个晶体管，以及用于反相从晶体管的公共漏极输出的信号以输出第三时钟信号的反相器电路。 延迟单元延迟第一时钟信号，使得第一时钟信号在占空比变为50％的定时出现。 时钟信号输出单元中的两个晶体管响应于第一时钟信号的上升和第二时钟信号的下降而输出作为第三时钟信号的接地电压和源极电压作为来自公共漏极的信号 ， 分别。
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7.发明申请Low-pass filter for a pll, phase-locked loop and semiconductor integrated circuit 失效低通滤波器，用于pll，锁相环和半导体集成电路公开(公告)号：US20050077955A1
公开(公告)日：2005-04-14
申请号：US10500875
申请日：2003-05-22
申请人： Shiro Dosho , Naoshi Yanagisawa , Masaomi Toyama , Keijiro Umehara , Masahiro Fukui , Takefumi Yoshikawa , Toru Iwata , Shiro Sakiyama , Ryoichi Suzuki
发明人： Shiro Dosho , Naoshi Yanagisawa , Masaomi Toyama , Keijiro Umehara , Masahiro Fukui , Takefumi Yoshikawa , Toru Iwata , Shiro Sakiyama , Ryoichi Suzuki
CPC分类号： H03L7/0812 , H03L7/0891 , H03L7/0893 , H03L7/0896 , H03L7/093
摘要： The invention provides a low-pass filter suitably used as a loop filter for a PLL or a DLL that has a filtering characteristic equivalent to that of a conventional one and can be realized in a smaller circuit area. The low-pass filter includes first filtering means (31) for accepting, as an input, an input signal to the low-pass filter and outputting a first voltage; a circuit element (311) included in the first filtering means (31) for allowing a first current to flow in accordance with the first voltage; current generating means (32) for generating a second current at a given rate to the first current; second filtering means (33) for accepting, as an input, the second current and outputting a second voltage; and adding means (34) for adding the first voltage and the second voltage and outputting an output signal of the low-pass filter, in which the second current is set to be smaller than the first current.
摘要翻译： 本发明提供一种适合用作PLL或DLL的环路滤波器的低通滤波器，其具有与常规滤波特性相同的滤波特性，并且可以在较小的电路面积中实现。 低通滤波器包括第一滤波装置（31），用于接收输入到低通滤波器的输入信号作为输入，并输出第一电压; 包括在第一过滤装置（31）中的用于允许第一电流根据第一电压流动的电路元件（311） 电流产生装置（32），用于以给定的速率产生与第一电流的第二电流; 第二滤波装置（33），用于接受第二电流作为输入并输出第二电压; 以及添加装置（34），用于将第一电压和第二电压相加，并输出低通滤波器的输出信号，其中第二电流被设置为小于第一电流。
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公开(公告)号：US06603219B2
公开(公告)日：2003-08-05
申请号：US09801472
申请日：2001-03-08
申请人： Masaomi Toyama , Shiro Dosho , Naoshi Yanagisawa
发明人： Masaomi Toyama , Shiro Dosho , Naoshi Yanagisawa
IPC分类号： H02J100
CPC分类号： H03K17/005 , H01L24/06 , H01L2224/05554 , H01L2224/49175 , H01L2924/14 , H03K3/03 , H03K17/693 , Y10T307/391 , Y10T307/461 , Y10T307/492 , H01L2924/00
摘要： A semiconductor integrated circuit includes a plurality of units. Each of the units includes a power supply pad, a function circuit, and a power supply control circuit. The plurality of units each have a first state in which the function circuit is in an operating state by the power supply pad being at a prescribed operating potential and a second state in which the function circuit is in a non-operating state by the power supply pad being at a prescribed non-operating potential. The power supply control circuit includes a switching circuit for connecting the power supply pad to the prescribed non-operating potential. The power supply control circuit in each of the plurality of units closes the switching circuit when at least one of the other units is in the first state and opens the switching circuit otherwise.
摘要翻译： 半导体集成电路包括多个单元。 每个单元包括电源焊盘，功能电路和电源控制电路。 所述多个单元各自具有第一状态，其中所述功能电路处于处于规定操作电位的所述功率电路处于工作状态，以及所述功能电路通过所述电源处于非工作状态的第二状态 垫处于规定的非操作电位。 电源控制电路包括用于将电源焊盘连接到规定的非工作电位的开关电路。 当多个单元中的至少一个处于第一状态时，多个单元中的每个单元中的电源控制电路闭合开关电路，否则打开开关电路。
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公开(公告)号：US20090278614A1
公开(公告)日：2009-11-12
申请号：US12096664
申请日：2006-10-25
申请人： Shiro Dosho , Kazuaki Sogawa , Yuji Yamada , Naoshi Yanagisawa
发明人： Shiro Dosho , Kazuaki Sogawa , Yuji Yamada , Naoshi Yanagisawa
IPC分类号： H03L7/08
CPC分类号： H03L7/0898 , H03L7/093 , H03L7/099 , H03L7/0995 , H03L7/107 , H03L7/183 , H03L2207/06
摘要： A constant determination unit (90) determines various constants, that are the magnitude of a charge current outputted from a charge pump circuit (30), the time constant of a loop filter (40), and the gain of a voltage controlled oscillator (50), so as to make the proportionality constant of a natural frequency of a phase locked loop circuit for the input frequency of the phase locked loop circuit and the damping factor to be predetermined values, and outputs various control signals based on the determined constants. The charge pump circuit (30), the loop filter (40), and the voltage controlled oscillator (50) modify the magnitude of the charge current, the time constant, and the gain, respectively, in accordance with control signals outputted from the constant determination unit (90).
摘要翻译： 常数确定单元（90）确定各种常数，即从电荷泵电路（30）输出的充电电流的大小，环路滤波器（40）的时间常数和压控振荡器（50）的增益 ），以使锁相环电路的输入频率和阻尼因子的锁相环电路的固有频率的比例常数成为预定值，并根据确定的常数输出各种控制信号。 电荷泵电路（30），环路滤波器（40）和压控振荡器（50）根据从常数输出的控制信号分别修正充电电流的大小，时间常数和增益 确定单元（90）。
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公开(公告)号：US06121826A
公开(公告)日：2000-09-19
申请号：US210780
申请日：1998-12-15
CPC分类号： H04N9/78
摘要： A comb filter easily implementable as a monolithic LSI without using a large-capacitance capacitor is provided. A comb-like frequency characteristic is realized by two delay circuits for delaying a signal for mutually different amounts of time and an operation circuit for deriving a sum or difference of the outputs thereof. An input select switch selectively outputs, instead of an image signal, a test signal, which is a DC signal having a predetermined amplitude, during a blanking interval of the image signal. A detector controls the gain of a variable-gain amplifier, provided for the output of either one of the delay circuits, in accordance with a difference between the output signal of the comb filter in response to the test signal and a predetermined reference signal. That is to say, the gain of the comb filter is controlled by using a stable test signal as a control signal, instead of a burst signal contained in an unstable image signal. Accordingly, a large-capacitance capacitor, which has been required for stabilizing the control signal, is no longer necessary.
摘要翻译： 提供了一种梳状滤波器，可以在不使用大容量电容器的情况下容易地实现为单片LSI。 梳状频率特性由用于延迟相互不同时间量的信号的两个延迟电路和用于导出其输出的和或差的运算电路实现。 在图像信号的消隐间隔期间，输入选择开关选择性地输出作为具有预定幅度的DC信号的测试信号而不是图像信号。 检测器根据测试信号和预定参考信号之间的梳状滤波器的输出信号之间的差异来控制提供给任一个延迟电路的输出的可变增益放大器的增益。 也就是说，通过使用稳定的测试信号作为控制信号来控制梳状滤波器的增益，而不是包含在不稳定图像信号中的突发信号。 因此，不再需要用于稳定控制信号所需的大容量电容器。
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