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    • 73. 发明公开
    • Touchscreen input validation system
    • EingabegültigkeitsbestätigungsverfahrenfüreineberührungsaktiveAnzeige。
    • EP0271276A2
    • 1988-06-15
    • EP87310580.3
    • 1987-12-01
    • TEKTRONIX, INC.
    • Tallman, James LarrySherbeck, Terry Gene
    • G01R13/34G06K11/06G06F3/033G01R13/22
    • G06F3/033G01R13/22G01R13/347
    • A system for providing input to a computer comprises a touchscreen apparatus for generating a grid of horizontal and vertical light beams and producing a set of output signals, each indicating whether a corresponding one of the light beams strikes an object. A scanning device repeatedly scans the states of the output signals, stores data representing the last scanned state of each output signal, and transmits a first interrupt signal to the computer whenever the state of any one of the output signals changes. In response to the inter­rupt signal, the computer reads the stored scan data, determines whether the data indicates that a horizontal and a vertical light beam is striking an object, and if so, sets parameter values to iden­tify the horizontal and vertical light beams. In response to a second interrupt signal periodically generated by a clock, the computer determines whether or not the parameter values have remained constant for a predetermined period, and if so executes a routine responsive to the parameter values.
    • 用于向计算机提供输入的系统包括用于产生水平和垂直光束的网格的触摸屏设备,并且产生一组输出信号,每个输出信号指示相应的一个光束是否撞击物体。 扫描装置重复地扫描输出信号的状态,存储表示每个输出信号的最后扫描状态的数据,并且每当输出信号中的任一个的状态改变时,将第一中断信号发送到计算机。 响应于中断信号,计算机读取所存储的扫描数据,确定数据是否指示水平和垂直光束是撞击物体,如果是,则设置参数值以识别水平和垂直光束。 响应于由时钟周期性地产生的第二中断信号,计算机确定参数值是否在预定时间段内保持恒定,并且如果执行响应于参数值的例程。
    • 74. 发明公开
    • Method and apparatus for waveform analysis
    • Methode und Einrichtung zur Analyze der Wellenform。
    • EP0225704A2
    • 1987-06-16
    • EP86308184.0
    • 1986-10-21
    • TEKTRONIX, INC.
    • Carlton, Dale E.
    • G01R13/32G01R13/34
    • G01R13/345G01R13/32
    • Information regarding a statistical property of a wave is collected by electronically sampling the wave at a first sample point within a waveform epoch and measuring the magnitude of the wave at that sample point relative to a datum magnitude. Respective bands within a range of magnitudes are allocated to a plurality of addressable locations in an electronic memory device, and the contents of the addressable location to which is allocated the band of magnitudes in which the measured magnitude of the wave at the first sample point lies, is incremented by one unit. These steps are repeated for a plurality of additional sample points in a waveform epoch, the sample points being incoherent relative to the wave.
    • 关于波的统计特性的信息通过在波形周期内的第一采样点处电波采样波并且相对于基准幅度测量该采样点处的波的大小来收集。 将幅度范围内的各个频带分配给电子存储装置中的多个可寻址位置,并且可寻址位置的内容被分配给第一采样点的波的测量幅度在其中的幅度带 ,增加一个单位。 在波形历元中对于多个附加采样点重复这些步骤,采样点相对于波是不相干的。
    • 76. 发明公开
    • Digital oscilloscope
    • 数字Oszilloskop。
    • EP0181565A1
    • 1986-05-21
    • EP85113814.9
    • 1985-10-30
    • Hewlett-Packard Company
    • Wilson, John Robert
    • G01R13/34
    • G01R13/345G01R23/15
    • A digital oscilloscope comprises a circuit for detecting inaccurate reconstructions of waveforms. The fundamental frequency of the input signal under test of the oscilloscope is determined by a frequency determining circuit (20,50) and compared with the sampling frequency. If the fundamental frequency is larger than a predetermined fraction of the sampling frequency, an alias flag signal is produced by a circuit (56) giving a warning to the user that inaccurate reconstruction of a waveform can occur. The sampling rate can be increased in response to the occurrence of the alias flag signal to ensure accurate reconstruction of the waveform on the display means of the oscilloscope.
    • 数字示波器包括用于检测不正确的波形重建的电路。 示波器测试的输入信号的基频由频率确定电路(20,50)确定,并与采样频率进行比较。 如果基本频率大于采样频率的预定分数,则由电路(56)产生别名标志信号,该电路给用户警告波形的不准确重建。 可以响应于别名标志信号的出现而增加采样率,以确保示波器的显示装置上的波形的精确重建。
    • 77. 发明公开
    • SIGNAL SAMPLING AND CONVERSION SYSTEM.
    • SIGNALABTASTUNGS- UND UMSETZUNGSSYSTEM。
    • EP0087438A4
    • 1984-06-05
    • EP82902634
    • 1982-09-07
    • SPALDING DAVID IAN
    • SPALDING DAVID IAN
    • G01R13/34H03M1/00G01R19/04
    • G01R13/34
    • A signal sampling and conversion system for high-frequency sampling of either recurrent or non-recurrent signals in which the electron beam (6) generated by an electron gun assembly (2) of a CRT (1) is scanned across a charge coupled device (5) consisting of an array of storage elements located at the focal plane of the electron beam (6), with the time base and defection cicuit (9) of the CRT (1) being used to scan the beam (6) across the array at a rate equal to the sample rate. Depending on the configuration of the storage elements, which can be a linear array of rectangular or triangular elements, or a rectangular array, the beam current (6) is modulated or the Y deflection plates (3) are controlled by the input signal (13). Charges accumulate in the elements of the array which are indicative of the amplitude or range of amplitudes of the input signal (13) during the period of each sample; the accumulated charges are transferred from the storage elements, quantized (10) and digitally processed (11) to yield the amplitude of the signal.
    • 一种信号采样和转换系统,用于对经常或非经常信号进行高频采样,其中由CRT(1)的电子枪组件(2)产生的电子束(6)通过电荷耦合器件( 5)由位于电子束(6)的焦平面上的存储元件阵列组成,其中CRT(1)的时基和偏转电路(9)用于在阵列上扫描光束(6) 速度等于采样率。 取决于可以是矩形或三角形元件的线性阵列或矩形阵列的存储元件的配置,束流(6)被调制或Y偏转板(3)由输入信号(13) )。 电荷积聚在阵列的元件中,这些元件表示在每个采样周期期间输入信号(13)的振幅或振幅范围; 积累的电荷从存储元件传输,量化(10)并数字处理(11)以产生信号的幅度。
    • 79. 发明公开
    • Waveform digitizer
    • 模拟/数字转换器的波形。
    • EP0024787A1
    • 1981-03-11
    • EP80301582.5
    • 1980-05-14
    • JOHN FLUKE MFG. CO., INC.
    • Koeman, Henriecus
    • G01R13/34G01R19/25H03K13/02
    • G01R19/257G01R13/342G01R17/04H03M1/50
    • A waveform digitizer particularly suitable for use in electronic test systems for analyzing and displaying analog signals is disclosed. A digitally derived reference voltage is compared with the analog signal to be digitized during a series of comparison sequences. Simultaneously with the start of each comparison sequence a digital clock is started. Each time the analog signal rises above, or drops below, the reference voltage a decision change detector produces an enable pulse. Each time an enable pulse occurs, a data word, having a portion related to the value of the digitally derived reference voltage and a portion related to the digital clock value, is stored and/or used to control a display. At the end of the first comparison sequence (determined when the digital clock value reaches a predetermined level) the reference voltage is incremented and a second comparison sequence started. These steps are repeated until the reference voltage reaches a predetermined level. The resulting set of digital words is a digitized equivalent of the waveform of the analog signal.