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1. 发明授权

US06787938B1 Method and circuit for switchover between a primary and a secondary power source 有权
标题翻译：主电源和次电源之间切换的方法和电路
公开(公告)号：US06787938B1
公开(公告)日：2004-09-07
申请号：US09626550
申请日：2000-07-27
申请人： David C. McClure , Tom Youssef
发明人： David C. McClure , Tom Youssef
IPC分类号： G01R2316
CPC分类号： G11C5/141 , Y10T307/615 , Y10T307/625 , Y10T307/826
摘要： An integrated circuit and method for providing a switchover from the primary power source to the secondary power source to prevent a volatile element from losing stored data. The integrated circuit includes a forced power source switchover circuit for detecting that the supply level of the primary power source drops below a predefined threshold level. A switchover circuit on the integrated circuit initiates a switchover operation based upon the forced power source switchover circuit detecting that the supply level being received from the primary power source drops below the predefined threshold level. The detection by the forced power source switchover circuitry may occur on a signal level that transitions faster than a predetermined negative rate of change. The integrated circuit may be incorporated in any system having volatile elements, such as memory or a clock.
摘要翻译：一种用于提供从主电源到次电源的切换以防止易失性元件丢失存储的数据的集成电路和方法。集成电路包括强制电源切换电路，用于检测主电源的电源电平低于预定阈值电平。集成电路中的切换电路基于强制电源切换电路检测到从主电源接收的电源电平下降到低于预定阈值水平的情况下开始切换操作。强制电源切换电路的检测可能发生在比预定的负变化率更快地转变的信号电平上。集成电路可以并入具有诸如存储器或时钟之类的易失性元件的任何系统中。

2. 发明授权

US06777921B2 Analog filter with built-in self test 有权
标题翻译：模拟滤波器内置自检
公开(公告)号：US06777921B2
公开(公告)日：2004-08-17
申请号：US10062180
申请日：2002-01-30
申请人： Salem Abdennadher , Hassan Ihs
发明人： Salem Abdennadher , Hassan Ihs
IPC分类号： G01R2316
CPC分类号： H03H11/1291
摘要： An analog filter in an integrated circuit is tested by placing the filter in a feedback loop. The filter is tested by determining whether the analog filter, while in the feedback loop, provides a signal that oscillates within a predetermined tolerance of an expected frequency.
摘要翻译：通过将滤波器置于反馈回路中来测试集成电路中的模拟滤波器。通过在反馈回路中确定模拟滤波器是否提供在预期频率的预定容差内振荡的信号来测试滤波器。

3. 发明授权

US06775629B2 System and method for estimating one or more tones in an input signal 有权
标题翻译：用于估计输入信号中的一个或多个音调的系统和方法
公开(公告)号：US06775629B2
公开(公告)日：2004-08-10
申请号：US09880167
申请日：2001-06-12
申请人： Yong Rao , Michael Cerna
发明人： Yong Rao , Michael Cerna
IPC分类号： G01R2316
CPC分类号： H04L27/00 , G06F17/141
摘要： System and method for estimating signal parameters (e.g., frequency, amplitude and/or phase) of one or more tones present in an input signal. Samples of the input signal are received, and a frequency transform of the samples generated. An amplitude peak in the frequency transform corresponding to the tone is identified. Two or more frequency bins are selected proximate to the identified frequency in the transform. A tone frequency value is determined that minimizes a difference between two or more expressions, each including respective numerator and denominator terms corresponding to respective frequency bins and whose ratios each represent a complex amplitude of the tone at a respective bin. Each expressions includes a tone frequency variable that represents a correct tone frequency value of the tone. The correct tone frequency value is determined by computing differences between the expressions for different respective tone frequency variable values, and selecting the value that produces a smallest difference.
摘要翻译：用于估计存在于输入信号中的一个或多个音调的信号参数（例如，频率，幅度和/或相位）的系统和方法。接收输入信号的样本，生成样本的频率变换。识别对应于音调的频率变换中的幅度峰值。在变换中接近识别的频率选择两个或更多个频率仓。确定最小化两个或多个表达式之间的差的音频值，每个表达包括对应于相应频率仓的各自的分子和分母项，并且其比率各自表示各个音箱处的音调的复振幅。每个表达式包括表示音调的正确音调频率值的音调频率变量。通过计算不同的各个音调频率可变值的表达式之间的差异以及选择产生最小差异的值来确定正确的音调频率值。

4. 发明授权

US06509728B1 Spectrum analyzer having function of displaying amplitude probability distribution effectively 有权
标题翻译：频谱分析仪具有有效显示振幅概率分布的功能
公开(公告)号：US06509728B1
公开(公告)日：2003-01-21
申请号：US09314346
申请日：1999-05-19
申请人： Masaharu Uchino , Takashi Shinozuka , Haruhiko Hosoya
发明人： Masaharu Uchino , Takashi Shinozuka , Haruhiko Hosoya
IPC分类号： G01R2316
CPC分类号： G06F7/724 , G01R23/16 , G06F7/584 , G06F7/729 , H03K23/54
摘要： A spectrum analyzer including a signal receiving and processing unit, a sampling unit, a histogram measuring unit, an arithmetic unit and a display unit. The signal receiving and processing unit receives an input signal according to the desired frequency sweep information. The sampling unit samples a signal output from receiving and processing unit, according to a plurality of threshold values and outputs a plurality of output codes corresponding to sample values of the envelope of the input signal. The histogram measuring unit measures a group of histograms corresponding to the output codes produced by the sampling unit. The arithmetic unit calculates the amplitude probability distribution (APD) of the output signal based on the histograms. The display unit displays a band group having a plurality of the ranges calculated by the arithmetic unit as an area in different states.
摘要翻译：一种包括信号接收和处理单元，采样单元，直方图测量单元，运算单元和显示单元的频谱分析仪。信号接收和处理单元根据期望的频率扫描信息接收输入信号。采样单元根据多个阈值对从接收和处理单元输出的信号进行采样，并输出与输入信号的包络的采样值对应的多个输出代码。直方图测量单元测量与采样单元产生的输出代码相对应的一组直方图。算术单元基于直方图计算输出信号的幅度概率分布（APD）。显示单元将具有由算术单元计算出的多个范围的频带组显示为不同状态的区域。

5. 发明授权

US06466001B2 Method and apparatus for controlling the molten metal level in a mold in continuous casting 失效
标题翻译：用于控制连续铸造中的模具中的熔融金属水平的方法和装置
公开(公告)号：US06466001B2
公开(公告)日：2002-10-15
申请号：US09739870
申请日：2000-12-20
申请人： Kazuharu Hanazaki , Toshihiko Murakami , Masahiko Oka
发明人： Kazuharu Hanazaki , Toshihiko Murakami , Masahiko Oka
IPC分类号： G01R2316
CPC分类号： B22D11/181 , B22D2/003 , B22D11/16 , B22D11/18
摘要： A method and apparatus for controlling the level of molten metal in a mold for continuous casting by using a molten metal level control system incorporating a molten metal level controller in the control loop thereof, which comprises damping selectively the predetermined frequency of frequencies of periodical molten metal level fluctuations through a notch filter installed in the control loop. The control loop preferably includes the phase compensation calculation part for compensating the phase delay of the stopper opening position control signal for adjusting the amount of the molten metal to be fed to the mold. The control apparatus in the control loop comprises a molten metal level senser, an FFT analyzer, an automatic tuning device for dealing with the results of the FFT analysis, a molten metal level controller and a notch filter.
摘要翻译：一种用于通过在其控制回路中使用包含熔融金属液位控制器的熔融金属液位控制系统来控制用于连续铸造的模具中的熔融金属的水平的方法和装置，其包括选择性地阻挡周期性熔融金属的预定频率频率通过安装在控制回路中的陷波滤波器的电平波动。控制回路优选地包括相位补偿计算部分，用于补偿止动器打开位置控制信号的相位延迟，用于调节要供给到模具的熔融金属的量。控制回路中的控制装置包括熔融金属液位传感器，FFT分析器，用于处理FFT分析结果的自动调谐装置，熔融金属液位控制器和陷波滤波器。

6. 发明授权

US06453253B1 Impulse response measuring method 有权
标题翻译：脉冲响应测量方法
公开(公告)号：US06453253B1
公开(公告)日：2002-09-17
申请号：US09377024
申请日：1999-08-18
申请人： Tsugio Ito
发明人： Tsugio Ito
IPC分类号： G01R2316
CPC分类号： G01H3/005
摘要： An impulse response measuring method uses an echo chamber in which a speaker and a microphone are arranged. The speaker produces measured sounds, used for measurement of impulse response, which are detected by the microphone. The microphone produces sound signals corresponding to the measured sounds. An analysis device calculates impulse response of the echo chamber based on the sound signals. Then, the impulse response is subjected to Fourier transform to produce complex data consisting of real parts and imaginary parts with respect to an axis of frequency. The real parts and imaginary parts of the complex data are respectively subjected to smoothing processes to produce average data, which are combined together to form smoothed complex data. The smoothed complex data are subjected to inverse Fourier transform to produce anechoic-chamber-equivalent impulse response, which is a simulated impulse response of an anechoic chamber substantially corresponding to the impulse response actually measured in the echo chamber.
摘要翻译：脉冲响应测量方法使用布置有扬声器和麦克风的回波室。扬声器产生用于测量由麦克风检测的脉冲响应的测量声音。麦克风产生对应于测量声音的声音信号。分析装置基于声音信号计算回波室的脉冲响应。然后，脉冲响应进行傅里叶变换，以产生相对于频率轴的实部和虚部组成的复数数据。复数数据的实部和虚部分别进行平滑处理，以产生平均数据，将它们组合在一起形成平滑的复数数据。平滑的复数数据经受傅立叶逆变换以产生消声室等效脉冲响应，其是基本上对应于在回波室中实际测量的脉冲响应的消声室的模拟脉冲响应。

7. 发明授权

US06577965B1 Linear multichannel detection system for billing by spectrum convolution 失效
标题翻译：线性多通道检测系统，用于通过频谱卷积计费
公开(公告)号：US06577965B1
公开(公告)日：2003-06-10
申请号：US09482637
申请日：2000-01-14
申请人： Antonio Javier Morcillo Martinez
发明人： Antonio Javier Morcillo Martinez
IPC分类号： G01R2316
CPC分类号： H04M15/34 , H04M15/28 , H04M2215/22
摘要： A linear multichannel detection system for billing by spectrum convolution applicable in telecommunications systems, capable of detecting the metering pulses in a signal sent from a telephone exchange to the subscribers, multiplying the signal by a specific signal generated by the system and measuring powers corresponding to the signals resulting from the multiplication, in such a way that a power measured with a value greater than a predefined threshold value indicates detection of the pulse. The invention likewise refers to an access system including the detection system.
摘要翻译：一种用于通过频谱卷积计费的线性多通道检测系统，其能够检测从电话交换机向用户发送的信号中的计量脉冲，将该信号乘以由系统产生的特定信号，并且测量对应于由乘法产生的信号，使得以大于预定阈值的值测量的功率指示检测脉冲。本发明同样涉及包括检测系统的访问系统。

8. 发明授权

US06479977B1 Automatic electronic load pull circuit for oscillators 有权
标题翻译：用于振荡器的自动电子负载拉电路
公开(公告)号：US06479977B1
公开(公告)日：2002-11-12
申请号：US09705298
申请日：2000-11-03
申请人： Mikhail Mordkovich
发明人： Mikhail Mordkovich
IPC分类号： G01R2316
CPC分类号： G01R31/2822 , G01R31/2824
摘要： A load pull circuit with a monitoring port which provides a constant VSWR throughout a phase variation in excess of 360°. The fundamental circuit comprises a fixed resistor of fifty ohms placed in series with an external fifty ohm load monitoring port resistor to ground. In parallel with the two series resistors, which total 100 ohms, is placed a 33.3 ohm resistor that is connected to ground through a series L-C circuit. The capacitance in the L-C circuit is adjustable and can be varied to cause the L-C circuit to change in net value from being inductive, to being resonant, and finally being capacitive. This causes the 33.3 ohm resistor to be connected to ground through an inductor, then through a short, and finally through a capacitor, making the load pull circuit present a load that vary through 360 degree in phase, while still remaining at a VSWR of 2:1. The inductor in the L-C circuit is a varactor, making the sweep through all 360° totally electronically controllable and simple to automate. This invention reduces the measurement time from typically 5 minutes to less than one second.
摘要翻译：具有监控端口的负载拉电路，其在超过360°的相位变化中提供恒定的VSWR。基本电路包括一个50欧姆的固定电阻器，与一个外部的50欧姆负载监控端口电阻串联放置。与总共100欧姆的两个串联电阻并联，放置一个33.3欧姆电阻，通过一个L-C电路与地相连。 L-C电路中的电容是可调节的，可以改变，使得L-C电路的净值从电感变为谐振，最后变为电容。这使得33.3欧姆电阻器通过电感器接地，然后通过短路，最后通过电容器，使负载拉电路呈现出相位相差360度的负载，同时仍保持在2W的VSWR ：1。 L-C电路中的电感器是一个变容二极管，使得扫描全部360°全电子可控并且易于自动化。本发明将测量时间从典型的5分钟缩短到小于1秒。

9. 发明授权

US06389365B1 Method for operating a spectrum analyzer to display a marker of a signal of interest 有权
标题翻译：用于操作频谱分析仪以显示感兴趣信号的标记的方法
公开(公告)号：US06389365B1
公开(公告)日：2002-05-14
申请号：US09383065
申请日：1999-08-25
申请人： Corydon J. Boyan , Tosya Shore , David Del Castillo
发明人： Corydon J. Boyan , Tosya Shore , David Del Castillo
IPC分类号： G01R2316
CPC分类号： G01R23/18
摘要： A method for operating a spectrum analyzer to provide a marker that follows a peak from sweep to sweep in a spectrum display. The method operates on first and second measured spectrums. The first measured spectrum includes a plot of the signal amplitude against frequency during a first time interval in which the marker has been assigned to a peak at a first frequency and first amplitude. The present invention assigns the marker to a peak in the second spectrum measured during a subsequent time interval in which the marker is to be assigned. Initially, a first frequency range is defined in the second measured spectrum centered on the first frequency. The first frequency range is searched for candidate peaks having amplitudes within a first range centered on the first amplitude. If more than one such candidate peak is found by the search, the marker is assigned to the candidate peak closest to the first frequency. If a candidate peak is not found, a second frequency range is defined centered on the first frequency, and the process is repeated with a different amplitude range. If more than one such candidate peak is found by the search, the marker is assigned to the candidate peak farthest from the first frequency. If no candidate peak is found, a third frequency range in the second measured spectrum is defined and this frequency range is searched for all candidate peaks regardless of amplitude. The marker is assigned to one of the candidate peaks based on a weighted sum of the differences in amplitude and frequency of the candidate peaks and the first amplitude and frequency.
摘要翻译：一种用于操作频谱分析仪以提供在频谱显示中从扫描到扫描之后的峰值的标记的方法。该方法在第一和第二测量光谱上操作。第一测量频谱包括在第一时间间隔期间信号幅度与频率的曲线图，其中标记已经被分配到在第一频率处的峰值和第一幅度。本发明将标记分配给在标记被分配的后续时间间隔期间测量的第二频谱中的峰值。首先，以第一频率为中心的第二测量频谱中定义第一频率范围。搜索第一频率范围，该候选峰的幅度在第一幅度为中心的第一范围内。如果通过搜索找到多于一个这样的候选峰，则将标记分配给最接近第一频率的候选峰。如果未找到候选峰，则以第一频率为中心定义第二频率范围，并以不同的幅度范围重复该过程。如果通过搜索找到多于一个这样的候选峰值，则将标记分配给距离第一频率最远的候选峰。如果没有找到候选峰，则定义第二测量光谱中的第三频率范围，并且无论幅度如何，都搜索所有候选峰的该频率范围。基于候选峰值的振幅和频率的差异与第一幅度和频率的加权和，将标记分配给候选峰之一。

10. 发明授权

US06347286B1 Method and device operating by interpolation in a discrete spectrum to determine characteristics of a signal and application thereof 失效
标题翻译：方法和装置通过离散频谱中的内插操作，以确定信号的特征及其应用
公开(公告)号：US06347286B1
公开(公告)日：2002-02-12
申请号：US09116800
申请日：1998-07-16
申请人： Jean-Paul Petillon
发明人： Jean-Paul Petillon
IPC分类号： G01R2316
CPC分类号： G01S7/354 , G01R23/16 , G01S13/882 , G01S2007/356 , H03D3/006
摘要： The present invention concerns a method and a device (1) operating by intepolation in a discrete spectrum to determine characteristics Pq of a signal s(t,Pq). In accordance with the invention, said device (1) includes means (2, 4, 6, 8, 10, 12) for determining said characteristics Pq from a system of m equations: z(fi)=Fi[w(t).s(t,Pq)].h(f), i varying from 1 through m and m being greater than or equal to 2, wherein: z(fi) is an element of a discrete spectrum obtained by Fourier transformation of the signal s(t,Pq), Fi is a discrete Fourier transform, w(t) is a temporal weighting function, and h(f) is a frequency transfer function of an anti-aliasing filter.
摘要翻译：本发明涉及一种通过离散频谱内插操作的方法和装置（1），以确定信号s（t，Pq）的特征Pq。根据本发明，所述装置（1）包括用于从m个方程的系统确定所述特性Pq的装置（2，4,6,8,10,12）：i从1到m和m变化大于或等于等于2，其中：z（fi）是通过信号s（t，Pq）的傅里叶变换获得的离散频谱的元素，Fi是离散傅立叶变换，w（t）是时间加权函数，而h（ f）是抗混叠滤波器的频率传递函数。

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