Feedforward amplifier
    62.
    发明授权
    Feedforward amplifier 失效
    前馈放大器

    公开(公告)号:US5898339A

    公开(公告)日:1999-04-27

    申请号:US912687

    申请日:1997-08-18

    IPC分类号: H03F1/32 H04J1/00 H03F1/26

    CPC分类号: H03F1/3235

    摘要: A feedforward amplifier having a distortion detection loop and a distortion elimination loop is provided that achieves increased accuracy, improved response, and stable operation. A variable attenuator is placed in front of a detector in a loop output stage, and the amount of attenuation in the variable attenuator is set large during a transient response period during the rising of the amplifier, and set small during a steady-state condition. The detection of the transition to the steady-state condition is accomplished, for example, by comparing the detector output with a prescribed threshold value. The width of perturbation is set large during a transient response period, and set small during a steady-state condition.

    摘要翻译: 提供具有失真检测回路和失真消除回路的前馈放大器,其实现了增加的精度,改进的响应和稳定的操作。 可变衰减器放置在环路输出级中的检测器的前面,并且在放大器的上升期间的瞬态响应周期期间可变衰减器中的衰减量被设置得很大,并且在稳态条件期间设置得较小。 例如,通过将检测器输出与规定的阈值进行比较来实现向稳态条件的转变的检测。 在瞬态响应期间扰动宽度设置较大,在稳态条件下设置较小。

    Method of producing biaxially oriented tubular polyetheretherketone films
    63.
    发明授权
    Method of producing biaxially oriented tubular polyetheretherketone films 失效
    双轴取向管状聚醚醚酮薄膜的制备方法

    公开(公告)号:US4687615A

    公开(公告)日:1987-08-18

    申请号:US776545

    申请日:1985-09-16

    IPC分类号: B29C47/00 B29C47/88

    摘要: A method of producing biaxially oriented tubular polyetheretherketone films having good optical and mechanical properties and heat resistance, by rapidly quenching at a rate of at least 24.degree. C. per second an unoriented tubular polyetheretherketone film as melt-extruded through a circular die thereby imparting a crystallinity of not greater than 10% to the film, and continuously introducing the thus produced film into the space between a feed nip roll pair and a pull nip roll pair while reheating the film externally to a temperature of 60.degree.-140.degree. C. and allowing the film to expand under the influence of the internal pressure to an areal draw ratio of 4-36, to thereby attain biaxial orientation.

    摘要翻译: 一种制备双轴取向的管状聚醚醚酮膜的方法,其通过以每秒至少24℃的速度快速淬火,通过圆形模头熔融挤出的无取向的管状聚醚醚酮膜,从而赋予双轴取向的管状聚醚醚酮膜, 结晶度不大于10%,并且将如此制得的膜连续地引入到进给辊辊对和拉压辊辊对之间的空间中,同时将膜外部再加热到60-140℃的温度, 使膜在内部压力的影响下膨胀至面积拉伸比为4-36,从而获得双轴取向。

    Solid polymer electrolyte, method of making, and electrochemical device using the same
    70.
    发明授权
    Solid polymer electrolyte, method of making, and electrochemical device using the same 失效
    固体聚合物电解质,制备方法和使用其的电化学装置

    公开(公告)号:US06395419B1

    公开(公告)日:2002-05-28

    申请号:US09022401

    申请日:1998-02-12

    IPC分类号: H01M1014

    摘要: A solid polymer electrolyte is prepared by forming a polymer solution containing a filler into a film, evaporating off the solvent from the film, and impregnating the film with an electrolytic solution. The impregnated polymer electrolyte has a swelling factor of at least 2.2. The method is efficient enough to produce the polymer electrolyte at a low cost. The polymer electrolyte is useful in electrochemical devices such as lithium secondary batteries and electric double layer capacitors.

    摘要翻译: 通过将含有填料的聚合物溶液形成膜,从膜蒸发掉溶剂并用电解液浸渍膜来制备固体聚合物电解质。 浸渍的聚合物电解质具有至少2.2的溶胀因子。 该方法足够有效地以低成本制备聚合物电解质。 聚合物电解质可用于锂二次电池和双电层电容器等电化学装置。