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公开(公告)号：US06980142B2
公开(公告)日：2005-12-27
申请号：US10657736
申请日：2003-09-08
申请人： Sadeg M. Faris
发明人： Sadeg M. Faris
CPC分类号： H03M1/32
摘要： A system and method for converting an analog voltage signal to a digital representation at high speeds, known as an analog to digital converter (A/D converter), is provided in the form of an N-bit A/D converter, made by N superconducting, preferably HTC, transmission lines. The N lines are arranged adjacently and in parallel with each other. On each line 2N−1 Josephson Junctions (JJs) are embedded in series. The JJs form a matrix over the configuration of the N superconducting transmission lines. A scanning electron beam is made to impinge on this arrangement across the lines at a high frequency, while it is deflected by the applied voltage signal along the direction of the lines. A voltage step is generated upon hitting any one of the JJs. In this manner upon each cross-scanning of the beam, an N-bit step voltage pattern is generated on the lines.
摘要翻译： 以模拟数字转换器（A / D转换器）的形式将模拟电压信号转换为高速数字显示的系统和方法以N位A / D转换器的形式提供，由N 超导，优选HTC，传输线。 N行相互并排设置。 在每条线上，串联嵌入了N-1个约瑟夫逊接头（JJ）。 JJ在N超导传输线的配置上形成矩阵。 使扫描电子束以高频撞击在该布置上，同时沿着线的方向被施加的电压信号偏转。 在击中任何一个JJ时产生电压阶跃。 以这种方式在每次交叉扫描光束时，在线上产生N位步进电压模式。
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公开(公告)号：US20050035889A1
公开(公告)日：2005-02-17
申请号：US10657736
申请日：2003-09-08
申请人： Sadeg Faris
发明人： Sadeg Faris
CPC分类号： H03M1/32
摘要： A system and method for converting an analog voltage signal to a digital representation at high speeds, known as an analog to digital converter (A/D converter), is provided. The invention teaches an N-bit A/D converter, made by N superconducting, preferably HTC, transmission lines. The N lines are arranged adjacently and in parallel with each other. On each line 2N−1 JJs are imbedded in series. The JJs form a matrix over the configuration of the N superconducting transmission lines in such a manner that across the lines the JJs give N digit binary numbers, while in the length direction these N digit binary numbers fall in numerical order. A scanning electron beam is made to impinge on this arrangement. The beam is scanned across the lines at a high frequency, while it is deflected by the applied voltage signal along the direction of the lines. The beam generates a voltage step on any one of the N lines on condition of hitting any one of the JJs. In this manner upon each cross-scanning of the beam, an N-bit step voltage pattern is generated on the lines. This pattern is the direct digital readout of the input voltage signal.
摘要翻译： 提供了一种用于将模拟电压信号以高速转换为数字表示的系统和方法，被称为模数转换器（A / D转换器）。 本发明教导了由N超导（优选HTC）传输线制成的N位A / D转换器。 N行相互并排设置。 在每条线上，2个N-1串联嵌入JJ。 JJ以这样的方式在N个超导传输线的配置上形成矩阵，使得跨越线路JJ给出N个数字二进制数，而在长度方向上，这些N位二进制数按数字顺序落下。 使扫描电子束撞击这种布置。 光束以高频扫描线，同时沿着线的方向被施加的电压信号偏转。 在击中任何一个JJ的条件下，光束在N条线的任何一条上产生电压阶跃。 以这种方式在每次交叉扫描光束时，在线上产生N位步进电压模式。 该模式是输入电压信号的直接数字读出。
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公开(公告)号：US5142285A
公开(公告)日：1992-08-25
申请号：US654471
申请日：1991-02-13
摘要： An optical theta-modulation based analog-to-digital converter having an acousto-optic deflector and an analog-to-digital conversion mask, for fast and flexible analog-to-digital conversion. The acousto-optic deflector deflects an optical beam at an angle corresponding to an input voltage signal having an analog value. The analog-to-digital conversion mask converts the deflected optical beam into N masked optical signals which each corresponds to a respective bit of a digital value representing the analog value of the input signal. Each optical signal is detected by a photodetector and converted into an output voltage signal by a comparator.
摘要翻译： 具有声光偏转器和模数转换掩模的基于光学θ调制的模数转换器，用于快速和灵活的模数转换。 声光偏转器以对应于具有模拟值的输入电压信号的角度偏转光束。 模数转换掩模将偏转的光束转换成N个掩蔽的光信号，每个对应于表示输入信号的模拟值的数字值的相应位。 每个光信号由光电检测器检测并由比较器转换成输出电压信号。
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公开(公告)号：US5005145A
公开(公告)日：1991-04-02
申请号：US367997
申请日：1989-06-19
CPC分类号： G01R35/005 , G01R13/04
摘要： An oscilloscope includes a digitizing camera mounted thereon for recording waveforms on the oscilloscope screen. The digitized signals representing the waveforms are stored in the computer. In the calibration process a plurality of baselines substantially equidistant from one another are scanned on the screen and thereafter a plurality of sine waves are scanned. The phase differences between each sine wave and an associated ideal sine wave are determined and are used to create a map which associates each point on a waveform of interest appearing on the oscillosope screen with a time value that corrects for nonlinearities in the horizontal axis which are injected by the optics, nonlinear voltages, etc. Another map is created utilizing the baseline scan which corrects for such nonlinearities in the vertical axis. A data waveform of interest appearing on the scope is mapped from its physical location on the target, using the time and voltage maps, onto a record which is corrected for nonlinearities and gain errors.
摘要翻译： 示波器包括安装在其上的数字化摄像机，用于在示波器屏幕上记录波形。 表示波形的数字化信号存储在计算机中。 在校准过程中，在屏幕上扫描基本上彼此等距的多个基线，此后扫描多个正弦波。 确定每个正弦波和相关联的理想正弦波之间的相位差，并且用于创建将在示波器屏幕上出现的感兴趣波形上的每个点与修正水平轴上的非线性的时间值相关联的映射， 由光学器件注入，非线性电压等。使用校正垂直轴上的这种非线性的基线扫描创建另一个映射。 将出现在范围上的感兴趣的数据波形从目标上的物理位置使用时间和电压映射映射到针对非线性和增益误差校正的记录上。
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公开(公告)号：US10720830B2
公开(公告)日：2020-07-21
申请号：US16394050
申请日：2019-04-25
申请人： NXP B.V.
发明人： Melaine Philip , Fabien Boitard
摘要： This specification discloses methods and systems for reducing negative undershoot during transient load response for a PWM (Pulse Width Modulation) boost power converter. In some embodiments, reduction of negative undershoot during transient load response is achieved by overriding the PWM duty cycle to a maximum duty cycle when VDDBOOST drops during load step. This maximum duty cycle (“max”) mode is triggered when VDDBOOST is within a hysteresis window. Setpoint for maximum duty cycle is versus DCDC converter output and input voltage. In some embodiments, a lookup table is implemented for determining the setpoint for maximum duty cycle.
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公开(公告)号：US3524134A
公开(公告)日：1970-08-11
申请号：US63542067
申请日：1967-05-02
申请人： ANDRZEJ LIBURA LECH
发明人： ANDRZEJ LIBURA LECH
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