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21. 发明授权

US3175172A Low reflection energy absorbers for waveguides 失效
标题翻译：用于波导的低反射能量吸收器
公开(公告)号：US3175172A
公开(公告)日：1965-03-23
申请号：US21724162
申请日：1962-08-08
申请人： WANDEL & GOLTERMANN
发明人： CHRISTIAN STAGER
IPC分类号： H01P1/22 , H01P1/26
CPC分类号： H01P1/264 , H01P1/222

22. 发明授权

US3875524A Phase-stable decadically adjustable frequency synthesizer 失效
标题翻译：相位稳定十分可调的频率合成器
公开(公告)号：US3875524A
公开(公告)日：1975-04-01
申请号：US38888773
申请日：1973-08-16
申请人： WANDEL & GOLTERMANN
发明人： HARZER PETER , HOFFMAN GUNTHER
IPC分类号： H03L7/185 , H03L7/197 , H03B3/04
CPC分类号： H03L7/1974 , H03L7/185
摘要： A variable-frequency oscillator, generating a succession of spikes of adjustable repetition frequency F, works through a pulse subtractor and a frequency divider with several cascaded decadic stages and a terminal binary stage into a phase comparator also receiving the output of a generator of reference frequency f. The pulse subtractor comprises two units separated by the first decadic divider stage, each unit supressing an incoming spike in response to a pulse applied to a control input thereof. The last decadic divider stage has a set of output leads connected in parallel to several digital selectors, one of them serving to transmit control pulses to the first subtractor unit whereas the others generate a train of control pulses for the second subtractor unit through a chain of decadic step-down stages individually loaded by the lowest-ranking selectors whose pulse rates are subharmonically related to reference frequency f. Several coincidence circuits, connected in parallel with the selectors to the output leads of the last decadic divider stage, are also connected to output leads of respective step-down stages in the chain in order to generate timing signals measuring the fraction of a reference-frequency cycle required to make the count of that divider stage equal to that of the associated stepdown stage; during the interval so measured, a compensating current flows into the phase comparator to control the slope of a sawtooth wave generated therein, thereby preventing the subharmonically recurring control pulses from causing fluctuations in the selected oscillator frequency F. The binary divider stage limits the generation of control pulses to oddnumbered halves and the flow of compensating current to evennumbered halves of its operating cycle.

23. 发明授权

US3796952A Frequency-selective calibrated amplitude-measuring system 失效
标题翻译：频率选择性校准幅度测量系统
公开(公告)号：US3796952A
公开(公告)日：1974-03-12
申请号：US3796952D
申请日：1972-04-24
申请人： WANDEL & GOLTERMANN
发明人： BAYER H
IPC分类号： G01R19/00 , H04B3/48 , G01R1/02 , G01R1/38
CPC分类号： G01R19/0007 , H04B3/48
摘要： An incoming signal voltage of frequency fe, whose amplitude is to be measured, is additively heterodyned in a first mixer with a locally generated variable test frequency ft to provide a first beat frequency fi1 fe + ft clearing a first filter with a pass band including that beat frequency. In a second mixer, preceding a second filter with a narrow pass band centered on a second beat frequency fi2, the first beat frequency fi1 is subtractively heterodyned with a locally generated ancillary frequency fc of magnitude fi1 - fi2 to provide the frequency fi2 which passes the second filter and reaches an amplitude indicator through an adjustable amplifier or attenuator. In a calibrating position, a fixed reference frequency fo fi2 from a local oscillator is substituted for the input frequency fe whereas the test frequency ft is replaced by the ancillary frequency fc in the first mixer.

24. 发明授权

US3761947A Display converter for recording multiplicity of oscilloscope traces 失效
标题翻译：显示转换器用于记录OSCILLOSCOPE跟踪的多重性
公开(公告)号：US3761947A
公开(公告)日：1973-09-25
申请号：US3761947D
申请日：1972-09-11
申请人： WANDEL & GOLTERMANN
发明人： VOLKMANN K , DICK R
IPC分类号： G01R13/20 , G01D5/00
CPC分类号： G01R13/208
摘要： An oscilloscope, serving to display the traces of different output voltages of a test circuit representing at least two circuit parameters (amplitude and phase) in various testfrequency bands, is coupled to a graphic recorder through a converter including a source of triangular sweep voltage for the x-deflection of the stylus of the recorder. The cadence of this sweep voltage is substantially lower than that of a triangular scanning voltage (wobble frequency) serving for the exploration of each band, a comprator in the converter generating a coincidence signal upon detecting a match between the two triangular frequencies to pass a sample of the output voltage for deflecting the stylus in the y-direction. Whenever the monotonically varying sweep voltage over- or undershoots the range of the scanning voltage derived from the oscilloscope input, the prolonged absence of the coincidence signal gives rise in the converter to an end-of-sweep signal which, upon every third occurrence, causes a switchover to a different parameter and/or frequency band. The switchover in the oscilloscope input is accompanied by a modification of the basic horizontal and/or vertical control voltage for the stylus so that the new trace is inscribed on a different portion of the paper sheet serving as a recording medium. Each recording cycle includes a high-speed first period for the registration of an upper reference line, a low-speed second period for the inscription of the trace and a high-speed third period for the registration of a lower reference line.
摘要翻译：用于显示表示各种测试频带中的至少两个电路参数（幅度和相位）的测试电路的不同输出电压的迹线的示波器通过包括三角形扫描电压源的转换器耦合到图形记录器用于记录仪的触针的x偏转。该扫频电压的频率基本上低于用于探测每个频带的三角扫描电压（摆动频率）的频率，转换器中的一个合成器在检测到两个三角频率之间的匹配以通过样本时产生一致信号的输出电压用于在y方向上偏转触笔。每当单调变化的扫描电压超过或低于从示波器输入导出的扫描电压的范围时，长时间不存在一致信号会使转换器产生扫频信号，在每三次出现之后，它将导致切换到不同的参数和/或频带。示波器输入中的切换伴随着对触针的基本水平和/或垂直控制电压的修改，使得新迹线被刻印在用作记录介质的纸张的不同部分上。每个记录周期包括用于登记上参考线的高速第一周期，用于记录轨迹的低速第二周期和用于下参考线的配准的高速第三周期。

25. 发明授权

US3753105A System for varying an oscilloscopic trace 失效
标题翻译：改变OSCILLOSCOPIC TRACE的系统
公开(公告)号：US3753105A
公开(公告)日：1973-08-14
申请号：US3753105D
申请日：1971-10-22
申请人： WANDEL & GOLTERMANN
发明人： HARZER P
IPC分类号： G01R13/30 , G01R13/20
CPC分类号： G01R13/30
摘要： The beam of a cathode-ray tube, normally suppressed, is electromagnetically deflected by a triangular current in the x direction and by a sinusoidal current in the y direction, thereby producing an invisible grid on the oscilloscope screen. Whenever the y-deflection signal matches either an input signal to be visualized or a selected reference signal, the beam is turned on for a small fraction of a y-sweep cycle to produce part of a luminous trace, representing the input signal, and a straight base line corresponding to the reference signal. In order to vary the position and/or the scale of representation of the trace with maintenance of its correct position relative to the base line, the y-deflection signal is subjected to multiplicative and/or additive modification.
摘要翻译：通常被抑制的阴极射线管的光束在x方向上被三角形电流和y方向上的正弦电流电磁偏转，从而在示波器屏幕上产生不可见的栅格。每当y偏转信号与要被可视化的输入信号或选择的参考信号相匹配时，光束被打开一小段y扫描周期，以产生表示输入信号的一部分发光迹线，并且a 对应于参考信号的直线。为了通过维持其相对于基线的正确位置来改变迹线的位置和/或尺度，y偏转信号经受乘法和/或加法修改。

26. 发明授权

US3743957A Noninductive equalizing network 失效
标题翻译：非线性均衡网络
公开(公告)号：US3743957A
公开(公告)日：1973-07-03
申请号：US3743957D
申请日：1971-12-03
申请人： WANDEL & GOLTERMANN
发明人： FEISTEL K
IPC分类号： H03H11/04 , H03H11/12 , H04B3/14 , H04L25/04 , H03F1/36
CPC分类号： H04B3/141 , H03H11/1252 , H04B3/14
摘要： An equalizing network for correcting phase and amplitude distortions comprises three cascaded operational-amplifier stages, all with grounded noninverting inputs, the first two of them having capacitive feedback to operate as inverting integrators while the third one has a resistive feed-back to function as a summing inverter. The first stage receives on its inverting input, by way of identical resistors, the input voltage and the output voltage of the network and feeds the inverting input of the second stage through an adjustable resistor serving for selection of the frequency of maximum or minimum attenuation. The last-mentioned input also receives the input voltage and the inverted output voltage through respective branches of a potentiometer, serving for adjustment of the attenuation, whose slider is in series with a further adjustable resistor controlling the phase delay. The connection between the potentiometer extremities and the network terminals may include a reversing switch to change the sign of the attenuation.
摘要翻译：用于校正相位和幅度失真的均衡网络包括三个级联的运算放大器级，全部具有接地非反相输入，其中前两个具有电容反馈以用作反相积分器，而第三个具有电阻反馈以用作求逆变器。第一级通过相同的电阻器接收网络的输入电压和输出电压，并将第二级的反相输入端通过可调节的电阻器，用于选择最大或最小衰减的频率。最后提到的输入还通过用于调节衰减的电位计的各个分支接收输入电压和反相输出电压，其滑块与控制相位延迟的另外可调电阻串联。电位器四极和网络端子之间的连接可以包括反转开关，以改变衰减的符号。

27. 发明授权

US3733549A System for measuring instantaneous frequency values 失效
标题翻译：用于测量瞬时频率值的系统
公开(公告)号：US3733549A
公开(公告)日：1973-05-15
申请号：US3733549D
申请日：1972-04-10
申请人： WANDEL & GOLTERMANN
发明人： HARZER P
IPC分类号： G01R23/10 , G01R23/14
CPC分类号： G01R23/10
摘要： An incoming oscillation, whose frequency during a brief reading interval is to be determined, is converted into a first pulse train of cadence f to be compared with the cadence f'' of an astable multivibrator responsive to a stored control voltage. During the reading interval the control voltage is modified by a signal depending upon the difference of the two cadences until the same are identical; during an adjoining extended storage period, the modified control voltage keeps the multivibrator operating at the unknown cadence f which is then measured by a binary counter.
摘要翻译：将要确定短暂读取间隔期间的频率的输入振荡被转换成第一脉冲串f，以便响应于所存储的控制电压与不稳定多谐振荡器的频率f'进行比较。在读取间隔期间，控制电压由取决于两个节奏的差异的信号修改，直到相同为止; 在相邻的扩展存储期间，修改的控制电压使多谐振荡器以未知节奏f运行，然后由二进制计数器测量。

28. 发明授权

US3681706A Variable-frequency generator with digital frequency selection 失效
标题翻译：具有数字频率选择的变频发电机
公开(公告)号：US3681706A
公开(公告)日：1972-08-01
申请号：US3681706D
申请日：1970-12-01
申请人： WANDEL & GOLTERMANN
发明人： HARZER PETER
IPC分类号： H03B23/00 , H03L7/18 , H03L7/181 , H03B3/04
CPC分类号： H03L7/18 , H03B23/00 , H03B2200/0092 , H03L7/181
摘要： The operating frequency of an electronically adjustable oscillator is continuously determined by a digital counter establishing a variable measuring interval during which the number of oscillator cycles reaches a magnitude preset in a digital selector. A feedback circuit from the output of a comparator, receiving the values stored in the counter and in the selector, readjusts the oscillator to make the measuring interval equal to a predetermined base period (e.g., of 1 second), consistent with the selected frequency, starting concurrently with that base period. A timing circuit periodically emits a pair of reference pulses marking the beginning and the end of the base period, at least the second pulse being subject to shifting under the control of a synchronization monitor to compensate for any time lag between the beginning of the base period and the start of the first full oscillator cycle; a further shifting of the second reference pulse, under the control of an ancillary selector, enables the generation of frequencies whose chosen magnitudes lie between adjacent settings of the digital selector. A pair of such digital selectors, alternately connectable to one of the comparator inputs, may serve for the establishment of upper and lower limits of a sweep range for the oscillator frequency; a third selector, effective during the sweep, may generate a frequency marker whenever the value registered therein matches the momentary output frequency of the oscillator.
摘要翻译：电子可调振荡器的工作频率由建立可变测量间隔的数字计数器连续确定，在该可变测量间隔期间振荡器周期数达到在数字选择器中预设的幅度。从比较器的输出端接收存储在计数器和选择器中的值的反馈电路重新调整振荡器，使测量间隔等于预定的基本周期（例如，1秒），与选定的频率一致，与该基期同时开始。定时电路周期性地发射一对标记基准周期的开始和结束的参考脉冲，至少第二脉冲在同步监视器的控制下经过移位以补偿基准周期开始之间的任何时间滞后并开始第一个整个振荡器周期; 在辅助选择器的控制下，第二参考脉冲的进一步移位能够产生其选定幅度位于数字选择器的相邻设置之间的频率。可以连接到比较器输入之一的一对这样的数字选择器可以用于建立振荡器频率的扫描范围的上限和下限; 每当其中登记的值与振荡器的瞬时输出频率匹配时，在扫描期间有效的第三选择器可以产生频率标记。

29. 发明授权

US3621471A Resonant network with reactively coupled fet providing linear voltage/frequency response 失效
标题翻译：具有提供线性电压/频率响应的反应耦合FET的谐波网络
公开(公告)号：US3621471A
公开(公告)日：1971-11-16
申请号：US3621471D
申请日：1969-11-26
申请人： WANDEL & GOLTERMANN
发明人： DICK RUDOLF
IPC分类号： H03C3/24 , H03C3/10
CPC分类号： H03C3/24
摘要： A field-effect transistor with two gates has a resistance and a reactance serially connected across its drain and source, with one gate tied to the junction of these two impedances whereas the other gate has a modulating signal applied to it. The resistance may be constituted by the output circuit of a differential transistor amplifier having its input connected in parallel with drain and source of the field-effect transistor.

30. 发明授权

US3611117A Voltage stabilizer with reversible binary counter for alternating-current lines 失效
标题翻译：具有可逆二进制计数器的电压稳定器用于替代电流线
公开(公告)号：US3611117A
公开(公告)日：1971-10-05
申请号：US3611117D
申请日：1969-11-20
申请人： WANDEL & GOLTERMANN
发明人： SCHNEIDER HEINZ
IPC分类号： G05F1/253 , H03M1/00 , G05F1/30
CPC分类号： G05F1/253 , H03M1/48
摘要： A plurality of transformers, having their secondary windings cascaded in either or both conductors of an AC line to be regulated, have graded voltage-transformation ratios corresponding to binary voltage increments to be impressed in aiding or opposing relationship upon the line in order to compensate for deviations of its output voltage from a predetermined magnitude. The transformers are fed from a common source of alternating current, synchronized with the line current, via enabling circuits responsive to the setting of respective stages of a reversible binary counter which is stepped forward or backward by pulses from a voltage-level sensor, a switchover circuit reverses the sense of the count upon the arrival of the counter in its zero positions, with simultaneous reversal of the phase of the impressed compensating voltages, to provide both positive and negative counts and to prevent discontinuities in the compensating voltage.

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