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    • 1. 发明授权
    • SAW resonator having a broad bandwidth
    • 具有宽带宽的SAW谐振器
    • US5010269A
    • 1991-04-23
    • US282177
    • 1988-12-09
    • Mitsutaka HikitaAtsushi SumiokaToyoji TabuchiKazuhito KurosawaTuneo Kinoshita
    • Mitsutaka HikitaAtsushi SumiokaToyoji TabuchiKazuhito KurosawaTuneo Kinoshita
    • H03H3/08H03H9/145H03H9/25
    • H03H9/14505H03H9/25
    • A SAW resonator includes resonating SAW transducer units formed on a piezoelectric substrate and juxtaposed in a direction of propagation of acoustic waves, and a unidirectionally reflecting SAW transducer unit provided in each end of the juxtaposed resonating SAW transducer units on the substrate. Each resonating SAW transducer unit includes first and second SAW transducers connected in series and/or in parallel with each other. Each unidirectionally reflecting SAW transducer unit includes first and second comb-like electrodes having a plurality of first second fingers, respectively, formed on the substrate, in which: two second fingers are interposed between each pair of adjacent two first fingers; at least one reflective stripe is provided between the two second fingers interposed between at least one pair of adjacent two first fingers; and the distances between the reflective stripe and the two second fingers and the widths of the two second fingers are determined such that acoustic waves produced by the fingers of the reflecting SAW transducer units and propagating in a first direction perpendicular to the direction of the length of the fingers and reflected by the reflective stripe in a second direction perpendicular to the first direction are in phase with acoustic waves propagating in the second direction and acoustic waves produced by the fingers of the reflecting SAW transducer units and propagating in the second direction and reflected by the reflective stripe in the first direction are out of phase with acoustic waves propagating in the first direction.
    • SAW谐振器包括形成在压电基板上并且在声波传播方向上并置的谐振SAW传感器单元,以及设置在基片上并置的谐振SAW换能器单元的每一端的单向反射SAW换能器单元。 每个谐振SAW换能器单元包括彼此串联和/或并联连接的第一和第二SAW换能器。 每个单向反射SAW换能器单元包括分别形成在基板上的多个第一第二指状物的第一和第二梳状电极,其中:两个第二指状物插入在每对相邻的两个第一指状物之间; 在插入在至少一对相邻的两个第一指状物之间的两个第二指状物之间提供至少一个反射条纹; 并且确定反射条和两个第二指状物之间的距离和两个第二指状物的宽度,使得由反射SAW换能器单元的指状物产生的声波在垂直于第二指状物的长度方向的第一方向上传播 手指并且在与第一方向垂直的第二方向上由反射条纹反射,与在第二方向上传播的声波和由反射SAW换能器单元的指状产生的声波相同,并且在第二方向上传播并由第 在第一方向上的反射条纹与在第一方向上传播的声波不同相。
    • 6. 发明授权
    • Surface acoustic wave resonator
    • 表面声波谐振器
    • US4734664A
    • 1988-03-29
    • US844104
    • 1986-03-26
    • Mitsutaka HikitaAtsushi SumiokaYoshikatu Ishida
    • Mitsutaka HikitaAtsushi SumiokaYoshikatu Ishida
    • H03H3/08H03H9/145H03H9/25H03H9/64
    • H03H9/6479H03H9/1455H03H9/25H03H9/6463
    • In order to realize an SAW filter withstanding high power, a plurality of single open-ended surface acoustic wave resonators are connected in series, and an earth conductor is disposed at least on a part of rear face of a piezoelectric substrate constituting the surface acoustic wave resonators. And static capacities formed between said earth conductor and electrode conductors on the piezoelectric substrate constituting the surface acoustic wave resonators are utilized as constituents of the filter circuit. In the above described structure, a part of input power is not converted into acoustic energy, but directly transmitted to the output side. Since the mechanical stress imposed upon the electrode material and the piezoelectric substrate is thus lightened, the SAW filter can withstand a large power signal.
    • 为了实现具有高功率的SAW滤波器,多个单开口声表面波谐振器串联连接,接地导体至少设置在构成声表面波的压电基片的背面的至少一部分上 谐振器。 在构成表面声波谐振器的压电基板上的所述接地导体和电极导体之间​​形成的静电容量被用作滤波器电路的组成部分。 在上述结构中,输入功率的一部分不被转换为声能,而是直接传输到输出侧。 由于施加在电极材料和压电基板上的机械应力因此减轻,所以SAW滤波器可以承受大的功率信号。
    • 8. 发明授权
    • Driving method of gas-discharge display panel
    • 气体放电显示面板的驱动方法
    • US4476466A
    • 1984-10-09
    • US259472
    • 1981-05-01
    • Eisuke MitaniYukio OkamotoAtsushi Sumioka
    • Eisuke MitaniYukio OkamotoAtsushi Sumioka
    • G09G3/10G09G3/29
    • G09G3/29G09G3/285
    • A method of driving a gas-discharge panel having at least one reset electrode and cathode and anode groups for forming N electrode pairs. The cathodes are p-phase connected (p.gtoreq.3) while the anodes are m-phase connected (m.ltoreq.p). The reset electrode is applied with a reset pulse voltage having a period of T of one frame. Cathode pulse voltages having their pulse widths of (p-1)T/N are successively applied to the cathodes for respective p phases with a phase shift of T/N to each other while anode pulse voltages having their pulse widths of at maximum (m-1)T/N are successively applied to the anodes for respective m phases with a phase shift of T/N to each other. A reset discharge which is generated by the reset pulse voltage and the first one of the cathode pulse voltages and anode pulse voltages applied for each frame and having a value cooperating with the reset pulse voltage value is successively transferred by means of the cathode and anode voltages to display desired information. As a result, the display luminance can be improved (p-1) times without impairing the self-scanning function.
    • 驱动具有至少一个复位电极和用于形成N个电极对的阴极和阳极组的气体放电板的方法。 阴极是p相连接的(p> / = 3),而阳极是m相连接的(m = p)。 复位电极施加具有一帧T周期的复位脉冲电压。 具有(p-1)T / N的脉冲宽度的阴极脉冲电压被连续地施加到具有T / N相移的各个p相的阴极彼此,而其脉冲宽度最大的阳极脉冲电压(m -1)T / N连续地施加到具有T / N的相移的各个m相的阳极。 通过复位脉冲电压产生的复位放电和施加于每个帧的具有与复位脉冲电压值协调的值的阴极脉冲电压和阳极脉冲电压中的第一个的复位放电通过阴极和阳极电压连续传输 以显示所需信息。 结果,可以在不损害自扫描功能的情况下改善(p-1)次的显示亮度。