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1.发明授权
公开(公告)号：US5459394A
公开(公告)日：1995-10-17
申请号：US113535
申请日：1993-08-27
IPC分类号： G01R15/22 , G01R1/07 , G01R31/302 , G01R31/308 , G01R31/319 , G01R31/00
CPC分类号： G01R31/308 , G01R1/071
摘要： An electro-optical measurement device for the sampling of an electric signal (SI) in an electronic component by means of a radiation beam. Special embodiments of the electro-optic measurement device are described. An electro-optic sensor element is provided with an electrically conductive tip at one side and with an electrode at the other side, so that an absolute and calibrated measurement is possible. The measurement beam can be high-frequency pulsed with a pulse (Lp) per period of the test signal (SI). The pulse series is low-frequency modulated and the pulses exhibit, relative to the test signal, a constant phase relationship during the first half periods of the modulation signal and a varying phase relationship during the second half periods so that accurate and reliable measurement is possible.
摘要翻译： 一种用于通过辐射束对电子部件中的电信号（SI）进行采样的电光测量装置。 描述电光测量装置的特殊实施例。 电光传感器元件在一侧设置有导电尖端，并且在另一侧设置有电极，使得绝对和校准的测量是可能的。 测量光束可以在每个测试信号（SI）的周期内用脉冲（Lp）进行高频脉冲。 脉冲序列是低频调制的，相对于测试信号，脉冲在调制信号的前半个周期期间呈现恒定的相位关系，并且在后半个周期期间呈现出改变的相位关系，从而可以进行准确可靠的测量 。
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公开(公告)号：US5399978A
公开(公告)日：1995-03-21
申请号：US23540
申请日：1993-02-26
CPC分类号： G01R1/06772
摘要： A probe apparatus includes a probe contact connected to a storage capacitance via a photoconductive switch. The photoconductive switch can be operated at high speed by means of a pulsed laser. The laser pulses (L) are synchronized with a moment in the operation cycle of the circuit at which moment the voltage at the point under test is to be measured. After a number of pulses and operation cycles the storage capacitance is charged to the voltage value (V) to be measured. Then, the capacitance does not form a load on the point under test and the voltage (V) can be determined accurately.
摘要翻译： 探针装置包括通过光电导开关连接到存储电容的探针接点。 光电导开关可以通过脉冲激光器高速运行。 激光脉冲（L）在电路的操作周期中的瞬间同步，此时将测量被测点处的电压。 在多个脉冲和操作周期之后，将存储电容充电到要测量的电压值（V）。 然后，电容不会在被测点上形成负载，并且可以准确地确定电压（V）。
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公开(公告)号：US06680884B1
公开(公告)日：2004-01-20
申请号：US09553606
申请日：2000-04-20
IPC分类号： G11B700
CPC分类号： G11B7/08505 , G11B7/0045 , G11B7/005
摘要： Apparatus for scanning a rotating information carrier having mutually substantially parallel tracks for the recording of information. The apparatus includes a transducer for scanning the information carrier and for generating a position signal which indicates a position of a scanning point scanned by the transducer. The apparatus further includes means for rotating the information carrier about an axis and means for moving the scanning point in a radial direction with respect to the axis. The apparatus has a scanning mode in which the scanning point jumps both from one track to another in a first radial direction and from one track to another in an opposite second direction during reading or writing of a file.
摘要翻译： 用于扫描具有相互基本平行的轨道的旋转信息载体用于记录信息的装置。 该装置包括用于扫描信息载体并用于产生指示由换能器扫描的扫描点的位置的位置信号的换能器。 该装置还包括用于使信息载体绕轴线旋转的装置和用于相对于该轴线在径向上移动扫描点的装置。 该装置具有扫描模式，其中扫描点在文件的读取或写入期间在第一径向方向上从一个轨道跳跃到另一个轨道，并且在相对的第二方向上从一个轨道跳到另一个轨道。
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