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    • 52. 发明授权
    • Feedforward amplifier with improved characteristics without using pilot
signal
    • 前馈放大器具有改进的特性,无需使用导频信号
    • US6133791A
    • 2000-10-17
    • US177651
    • 1998-10-23
    • Kenichi HoriguchiMasatoshi NakayamaYukio IkedaTadashi TakagiHaruyasu Senda
    • Kenichi HoriguchiMasatoshi NakayamaYukio IkedaTadashi TakagiHaruyasu Senda
    • H03F1/32H03F1/00
    • H03F1/3229
    • A feedforward amplifier which includes a distortion detector, a distortion eliminator, an error power extractor, a first level detector and a first controller. The error power extractor extracts output error power due to variations in the distortion eliminator by combining the output signal from the distortion eliminator with the signal from a first linear signal path in the distortion detector in opposite phases. The first level detector detects the output error power extracted by the error power extractor, and the first controller controls a first variable attenuator and a first phase shifter which are interposed in the distortion eliminator such that the output error power is maintained at zero. This can solve a problem of a conventional feedforward amplifier in that the power level of the pilot signal must be increased to heighten the detection sensitivity of the pilot signal because the detection level of the pilot signal becomes minimum at an optimum operation point, and that the increasing power of the pilot signal degrades the communication quality of a system employing the conventional feedforward amplifier.
    • 一种前馈放大器,包括失真检测器,失真消除器,误差功率提取器,第一电平检测器和第一控制器。 误差功率提取器通过将来自失真消除器的输出信号与来自失真检测器中的第一线性信号路径的信号相反地组合,由于失真消除器的变化而提取输出误差功率。 第一电平检测器检测由误差电力提取器提取的输出误差功率,并且第一控制器控制插入失真消除器中的第一可变衰减器和第一移相器,使得输出误差功率保持为零。 这可以解决常规前馈放大器的问题,因为导频信号的检测电平在最佳操作点变为最小时必须提高导频信号的功率电平,以提高导频信号的检测灵敏度, 导频信号的增加功率降低了采用常规前馈放大器的系统的通信质量。
    • 53. 发明授权
    • Curable fluorine-containing copolymer and coating liquid composition
containing same
    • 可固化的含氟共聚物和含有它的涂布液组合物
    • US5880234A
    • 1999-03-09
    • US831305
    • 1997-04-01
    • Kazuhiko MaedaYukio IkedaKentaro TsutsumiYutaka MaruyamaShuyo AkamaMichitaka Ohtani
    • Kazuhiko MaedaYukio IkedaKentaro TsutsumiYutaka MaruyamaShuyo AkamaMichitaka Ohtani
    • C08F214/18C08F218/10C08F12/22
    • C08F218/10C08F214/184C08F214/186
    • The invention relates to a curable fluorine-containing copolymer prepared by copolymerizing a monomer mixture. This monomer mixture is in an amount of 100 mol % in total and includes (a) 10-60 mol % of a first polymerizable monomer that is one of hexafluoroisobutene and hexafluoroacetone, each of which has one hexafluoroisopropylidene group; (b) 10-70 mol % of a fatty acid vinyl ester that is represented by a general formula of CH.sub.2 .dbd.CH--OC (.dbd.O) --R.sup.1 where R.sup.1 is one of an alkyl group and --(CH.sub.2).sub.m --R.sup.2 --(CH.sub.2).sub.n --H where R.sup.2 is one of a cycloalkylene group and a divalent aromatic group, and m and n are respectively integers each ranging from 0 to 12, the alkyl group having a carbon atom number of from 1 to 22 and an optional branched chain, each of the cycloalkylene group and the divalent aromatic group having an optional substituent; (c) 1-60 mol % of a second polymerizable monomer that has a cross-linkable functional group and a polymerizable double bond, the cross-linkable functional group being one selected from the group consisting of hydroxyl group, carboxyl group, hydrolyzable organosilyl groups, epoxy groups, .beta.-ketoester groups; and (d) 0-20 mol %, of a third polymerizable monomer that is different from the first and second monomers and the fatty acid vinyl ester and is free of a cross-linkable functional group. A coated film prepared by the application of a varnish containing the fluorine-containing copolymer is superior in water repellency and stain resistance.
    • 本发明涉及通过共聚单体混合物制备的可固化含氟共聚物。 该单体混合物的总量为100摩尔%,包括(a)10-60摩尔%的作为六氟异丁烯和六氟丙酮之一的第一可聚合单体,每个具有一个六氟异丙烯基; (b)10-70mol%由通式CH 2 = CH-OC(= O)-R1表示的脂肪酸乙烯基酯,其中R1是烷基和 - (CH2)m -R2- (CH2)nH,其中R2是亚环烷基和二价芳族基团之一,m和n分别为0-12的整数,碳原子数为1至22的烷基和任选的支链 ,各环亚烷基和具有任选取代基的二价芳基; (c)1-60摩尔%具有可交联官能团和可聚合双键的第二可聚合单体,所述可交联官能团选自羟基,羧基,可水解的有机甲硅烷基 ,环氧基团,β-酮酯基团; 和(d)0-20摩尔%的不同于第一和第二单体和脂肪酸乙烯基酯并且不含可交联官能团的第三可聚合单体。 通过使用含有含氟共聚物的清漆制备的涂膜具有优异的防水性和耐污染性。
    • 54. 发明授权
    • Vibration eliminating apparatus for elminating vibration of an
installation floor
    • 用于安装地板振动的消除振动的装置
    • US5385217A
    • 1995-01-31
    • US885451
    • 1992-05-19
    • Katsuhide WatanabeYoichi KanemituYukio Ikeda
    • Katsuhide WatanabeYoichi KanemituYukio Ikeda
    • F16F15/03G12B5/00B25H1/02
    • F16F15/03G12B5/00
    • A vibration eliminating apparatus for eliminating vibration suspends a floor board from an installation floor. A supporting electromagnet is provided on the installation floor in order to suspend a magnetic member fixed to the floor board by a magnetic force. The magnetic member is provided with a thin magnetic pole through a non-magnetic member, and a control electromagnet having a yoke located in proximity to the thin magnetic pole is provided to control a horizontal position of the floor board. A vibration detector is provided to detect vibration of the floor board, and a vibration monitor is used to decide whether or not vibration detected by the vibration detector is within an allowable range of a machine mounted on the floor board and output an operation enable signal only when vibration is within the allowable range.
    • 用于消除振动的振动消除装置将地板从安装地板悬挂下来。 支撑电磁铁设置在安装地板上,以便通过磁力悬挂固定在地板上的磁性构件。 磁性构件通过非磁性构件设置有薄磁极,并且设置具有位于薄磁极附近的磁轭的控制电磁体,以控制地板的水平位置。 提供振动检测器来检测地板的振动,并且使用振动监测器来确定振动检测器检测到的振动是否在安装在地板上的机器的允许范围内,并仅输出操作使能信号 当振动在允许范围内时。