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    • 6. 发明申请
    • Phase Measurement Device, Method , Program, And Recording Medium
    • 相位测量装置,方法,程序和记录介质
    • US20080018322A1
    • 2008-01-24
    • US10597415
    • 2005-01-19
    • Makoto KurosawaJuichi Nakada
    • Makoto KurosawaJuichi Nakada
    • G01R25/00
    • G01R23/20
    • The phases of distortions of a signal outputted from an amplifier are measured. A phase measurement device measures an output of an amplifier when an input signal having input frequency components ω10 and ω20 is fed to the amplifier. The phase measurement device includes multipliers for orthogonally transforming the output of the amplifier by means of ωc, a phase acquisition section for acquiring phases θ1 and θ2 of the input frequency components ω10 and ω20 in the output of the multipliers, and θ3 and θ4 (third distortion), and θ5 and θ6 (fifth distortion) of the distortion components, a match time/phase measurement section for measuring a match time point Δt when θ1 and θ2 match each other according to the acquisition result of the phase acquisition section, and a distortion component phase measurement section for measuring phases θ3 to θ6 of the distortion components at the match time point Δt according to the acquisition result of the phase acquisition section. The phase acquisition section acquires at least one of θ1 and θ2, and θ3 and θ5 (with the frequencies higher than those of θ1 and θ2) or θ4 and θ6 (with the frequencies lower than those of θ1 and θ2).
    • 测量从放大器输出的信号失真的相位。 当具有输入频率分量ω10和ω20的输入信号馈送到放大器时,相位测量装置测量放大器的输出。 相位测量装置包括乘法器,用于通过ωcac对放大器的输出进行正交变换;相位获取部分,用于在乘法器的输出中采集输入频率分量ω10和ω20的相位θ1和θ2,θ 3和θ4(第三失真),以及失真分量的θ5和θ6(第五失真);匹配时间/相位测量部分,用于测量当θ1和θ2彼此匹配时的匹配时间点Deltat 相位获取部分的采集结果,以及根据相位获取部分的获取结果测量匹配时间点Deltat处的失真分量的相位θ3至θ6的失真分量相位测量部分。 相位获取部分获取θ1和θ2中的至少一个,以及θ3和θ5(频率高于θ1和θ2的那些)或θ4和θ6(频率低于θ 1和θ2)。
    • 9. 发明授权
    • Printhead which minimizes stray magnetic flux
    • 打印头,最大限度地减少杂散磁通量
    • US4879947A
    • 1989-11-14
    • US120724
    • 1987-11-16
    • Makoto KurosawaKenichi Igarashi
    • Makoto KurosawaKenichi Igarashi
    • B41J9/36
    • B41J9/36
    • A dot matrix type printer head in which delays in the release of print hammers are eliminated by providing release coils only in alternate hammer positions, or alternatively, activating at one time only release coils in one of even-numbered and odd-numbered hammer positions. A rear yoke and a permanent magnet affixed to a lower leg of the rear yoke are provided in common for all hammer positions. An upper leg of the rear yoke is divided into a plurality of pole pieces. Hammer elements are provided having lower ends rigidly affixed to the rear yoke at positions adjacent the permanent magnet and upper ends retractable against pole faces of corresponding pole pieces by the magnetic force of the permanent magnet. In a first preferred embodiment of the invention, release coils are provided around only even-numbered or odd-numbered pole pieces. In a second preferred embodiment, release coils are provided around all pole pieces, but only release coils in even-numbered or odd-numbered hammer positions are driven simultaneously. In either case, stray magnetic flux which causes a delay in the release of a print hammer interposed between two previously activated print hammers is eliminated.
    • 通过仅在交替的锤位置中提供释放线圈来消除打印锤的释放延迟的点阵式打印机头,或者,一次只激活偶数和奇数锤位置之一的释放线圈。 固定在后轭的小腿上的后轭和永磁体设置在所有锤位置上。 后轭的大腿被分成多个极片。 锤元件具有下端,其刚性地固定在后轭上,在与永磁体相邻的位置处,上端通过永久磁铁的磁力可收回到相应极片的极面。 在本发明的第一优选实施例中,释放线圈仅围绕偶数或奇数极片设置。 在第二优选实施例中,释放线圈设置在所有极片周围,但是只有偶数或奇数锤位置的释放线圈同时被驱动。 在这两种情况下,消除了引起插入在两个之前激活的打印锤之间的打印锤的释放延迟的杂散磁通量。
    • 10. 发明授权
    • Waveform generator, waveform generating device, test apparatus, and machine readable medium storing a program thereof
    • 波形发生器,波形生成装置,测试装置和存储其程序的机器可读介质
    • US07885776B2
    • 2011-02-08
    • US11863280
    • 2007-09-28
    • Makoto Kurosawa
    • Makoto Kurosawa
    • G01R13/00
    • G01R31/31928G01R31/31922G01R31/31924
    • There is provided a waveform generator for generating an analog signal, including a data changing section which changes an input data sequence, which is a sequence of binary data and which is to be modulated to the signal which the waveform generator should generate, to generate an after-change data sequence such that in the signal to be obtained by MSK modulation, a residual phase obtained by dividing an initial phase of the signal by 2π and a residual phase obtained by dividing a final phase of the signal by 2π are continuous, a waveform generating section which generates basic waveform data representing a waveform corresponding to the signal obtained by subjecting the after-change data sequence to MSK modulation, and an output section which outputs the signal repeating the waveform represented by the basic waveform data.
    • 提供了一种用于产生模拟信号的波形发生器,包括数据改变部分,该数据改变部分改变输入数据序列,该输入数据序列是二进制数据序列,并且要被调制到波形发生器应产生的信号,以产生 后变化数据序列,使得在要通过MSK调制获得的信号中,通过将信号的初始相位除以2&pgr获得的残留相位; 以及通过将信号的最终相除以2&pgr获得的残留相; 波形生成部,其生成表示与通过对变更后数据序列进行MSK调制而获得的信号相对应的波形的基本波形数据;以及输出部,其输出重复由基本波形数据表示的波形的信号。