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    • 3. 发明申请
    • IMPROVED CATHODE STRUCTURES FOR X-RAY TUBES
    • 改进的X射线管的阴极结构
    • WO2007092228A2
    • 2007-08-16
    • PCT/US2007002661
    • 2007-01-29
    • VARIAN MED SYS TECH INCARNOLD JAMES TBANDY STEVEVIRSHUP GARY
    • ARNOLD JAMES TBANDY STEVEVIRSHUP GARY
    • H01J35/06H01J2235/06
    • An apparatus and method comprising a cathode structure which can be a cylindrical filament coiled in a helix or which can be constructed of a ribbon or other suitable shape. The cathode structure can be heated by passage of an electrical current, or by other means such as bombardment with energetic electrons. Selected portions of the surface of the cathode structure have an altered property with respect to the non-selected portions of the surface. In one embodiment, the altered property is a curvature. In another embodiment, the altered property is a work function. By altering the property of the selected portions of the surface, the electron beam intensity is increased, and the width is decreased.
    • 一种包括阴极结构的装置和方法,阴极结构可以是以螺旋线圈绕的圆柱形细丝,或者可以由带状物或其他合适的形状构成。 阴极结构可以通过电流加热,或者通过其他手段例如用高能电子轰击来加热。 阴极结构的表面的选定部分相对于表面的未被选择的部分具有改变的特性。 在一个实施例中,改变的特性是曲率。 在另一个实施例中,改变的属性是工作功能。 通过改变表面的选定部分的性质,电子束强度增加,并且宽度减小。
    • 7. 发明申请
    • DATA SIGNAL AMPLIFIER AND PROCESSOR WITH MULTIPLE SIGNAL GAINS FOR INCREASED DYNAMIC SIGNAL RANGE
    • 数字信号放大器和具有增加的动态信号范围的多个信号增益的处理器
    • WO2005039039A2
    • 2005-04-28
    • PCT/US2004/033632
    • 2004-10-12
    • VARIAN MEDICAL SYSTEMS, INC.ROOS, Pieter, GerhardSEPPI, EdwardCOLBETH, RichardVIRSHUP, GaryMOLLOV, Ivan, Petrov
    • ROOS, Pieter, GerhardSEPPI, EdwardCOLBETH, RichardVIRSHUP, GaryMOLLOV, Ivan, Petrov
    • H03F
    • H03F3/08H03M1/18
    • Data signal amplification and processing circuitry with multiple signal gains for increasing dynamic signal range. An incoming data signal is processed in accordance with multiple signal gains. The resultant signals have multiple signal values which are compared to predetermined lower and higher thresholds. The desired output signal is: the maximum sample signal value when the maximum value fails to traverse a predetermined lower threshold; the minimum sample signal value when an adjacent larger one of the plurality of sample signal values traverses a predetermined higher threshold; a smaller of mutually adjacent ones of a pair of the plurality of sample signal values when a larger one of the pair of sample signal values traverses the predetermined higher threshold and the smaller value fails to traverse the predetermined lower threshold; and a combination of the smaller and larger ones of the pair of sample signal values when the larger value traverses the predetermined lower threshold and fails to traverse the predetermined higher threshold.
    • 具有多个信号增益的数据信号放大和处理电路,用于增加动态信号范围。 输入数据信号根据多个信号增益进行处理。 所得到的信号具有与预定的较低和较高阈值进行比较的多个信号值。 所需的输出信号为:当最大值不能穿过预定的下限阈值时的最大采样信号值; 当所述多个采样信号值中的相邻较大的一个采样信号值穿过预定的较高阈值时的所述最小采样信号值; 当所述一对采样信号值中的较大一个穿过所述预定的较高阈值且所述较小值不能穿过所述预定下限阈值时,所述多个采样信号值对中的较小的一个; 以及当较大值穿过预定的下限阈值并且不能穿过预定的较高阈值时,该对采样信号值中的较小和较大者的组合。