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    • 1. 发明授权
    • Magnetic disk system and waveform equalizer therefor
    • 磁盘系统及其波形均衡器
    • US5463504A
    • 1995-10-31
    • US62770
    • 1993-05-18
    • Hiroshi KimuraShoichi MiyazawaRyutaro HoritaKenichi HaseAkihiko HiranoAkira Uragami
    • Hiroshi KimuraShoichi MiyazawaRyutaro HoritaKenichi HaseAkihiko HiranoAkira Uragami
    • G11B5/012G11B5/09G11B20/10G11B20/12G11B20/14
    • G11B20/10046G11B20/10009G11B20/10222G11B20/1403G11B5/012G11B5/09G11B20/1258
    • A magnetic disk system which records and reproduces data on a magnetic disk at different data transfer rates depending on a track position on the disk includes a transversal waveform equalizing circuit which implements an optimal waveform shaping for a readout waveform. The waveform equalizing circuit consists of a register, a frequency synthesizer, a PLL, and a transversal circuit. The transversal circuit consists of variable delay circuits, variable gain amplifiers, and an adder. The frequency synthesizer produces a write clock signal having a frequency which corresponds to a value stored in the register which depends on the data transfer rate, and the PLL responds to the write clock signal to produce a control signal by which the delay time of the transversal circuit is controlled. Consequently, the delay characteristic is not affected by disparity of circuit components of the transversal circuit, and the write clock frequency and the delay time of the transversal circuit can be set to intended values by merely changing the value stored in the register in response to a variation of the data transfer rate.
    • 根据磁盘上的轨道位置以不同的数据传输速率记录和再现磁盘上的数据的磁盘系统包括对读出波形实现最佳波形整形的横向波形均衡电路。 波形均衡电路由寄存器,频率合成器,PLL和横向电路组成。 横向电路由可变延迟电路,可变增益放大器和加法器组成。 频率合成器产生具有对应于存储在寄存器中的取决于数据传输速率的值的频率的写时钟信号,并且PLL响应于写时钟信号以产生控制信号,通过该控制信号,横向延迟时间 电路被控制。 因此,延迟特性不受横向电路的电路部件的不均匀影响,并且横向电路的写入时钟频率和延迟时间可以通过仅响应于一个变化来改变存储在寄存器中的值来设置为预期值 数据传输速率的变化。
    • 2. 发明授权
    • Sync data introduction method and system
    • 同步数据介绍方法和系统
    • US5475715A
    • 1995-12-12
    • US886860
    • 1992-05-22
    • Kenichi HaseSyoichi MiyazawaRyutaro HoritaAkihiko HiranoHiroshi KimuraAkira Uragami
    • Kenichi HaseSyoichi MiyazawaRyutaro HoritaAkihiko HiranoHiroshi KimuraAkira Uragami
    • G11B20/10G11B20/14H04L1/00H04L7/00H04L7/033H04L7/08
    • G11B20/1403H04L7/08H04L7/033
    • A data device for introducing the data read from a recording medium includes first creation device for receiving a read code signal corresponding to the data stored on a data recording medium to create first two phase signals which repeat inversion with a substantially equal period to each other on the basis of a change in the waveform of the read code; second creation device for receiving the first two phase signals to create second two phase signals with their one phase occupying most of their period having an overlapping portion with each other, the period being twice as long as that of the first two phase signals; and third creation device for receiving the read code signal and said second two phase signals to create a second code signal corresponding to the read code signal which shifts during the one phase period of said second two phase signals. The second two phase signals serve to extend sufficiently the window for introducing the read code to provide stabilized read for the data including jitter due to rotation fluctuation of the recording medium.
    • 用于引入从记录介质读取的数据的数据设备包括:第一创建设备,用于接收与存储在数据记录介质上的数据相对应的读取代码信号,以产生以两个相同周期重复反相的第一两个相位信号 读取代码的波形变化的基础; 第二创建装置,用于接收前两个相位信号以产生第二两相信号,其相位占据其大部分周期具有彼此重叠的部分,该周期是前两个相位信号的两倍; 以及第三创建装置,用于接收读取代码信号和所述第二两个相位信号,以产生对应于在所述第二两个相位信号的一个相位周期期间移位的读取代码信号的第二代码信号。 第二个两个相位信号充分地延伸用于引入读取代码的窗口,以提供包括由记录介质的旋转波动引起的抖动的数据的稳定读数。
    • 4. 发明授权
    • Active filter control apparatus
    • 有源滤波器控制装置
    • US5572163A
    • 1996-11-05
    • US362874
    • 1994-12-23
    • Hiroshi KimuraRyutaro HoritaKenichi HaseKunio WatanabeTakashi Nara
    • Hiroshi KimuraRyutaro HoritaKenichi HaseKunio WatanabeTakashi Nara
    • H03H11/04H03B5/00
    • H03H11/0472H03H11/0433H03H2210/023
    • An active filter control apparatus for controlling or tuning an active filter having a variable cut-off frequency. The active filter control apparatus includes a control circuit for controlling or tuning the cut-off frequency of the active filter and a characteristic correction generator for generating a correction signal to correct a group delay characteristic of the active filter in accordance with a set cut-off frequency. The characteristic correction includes a correction signal generator for generating the correction signal in accordance with a set correction amount. The cut-off frequency controller controls tunes the characteristic of the active filter in accordance with the correction signal. Preferably, the apparatus is formed of a one-chip LSI integrated on one chip. The control apparatus can be utilized to control the speed in a recording/reproducing apparatus such as a optical disk drive or a magnetic tape drive apparatus.
    • 一种用于控制或调谐具有可变截止频率的有源滤波器的有源滤波器控制装置。 有源滤波器控制装置包括用于控制或调谐有源滤波器的截止频率的控制电路和用于根据设定的截止产生校正信号校正有源滤波器的组延迟特性的特性校正发生器 频率。 特征校正包括用于根据设定的校正量产生校正信号的校正信号发生器。 截止频率控制器根据校正信号控制有源滤波器的特性。 优选地,该装置由集成在一个芯片上的单芯片LSI形成。 控制装置可以用于控制诸如光盘驱动器或磁带驱动装置的记录/再现装置中的速度。
    • 7. 发明授权
    • Shift register based downsampled floating tap decision feedback equalization
    • 基于移位寄存器的下采样浮点判定反馈均衡
    • US08743945B2
    • 2014-06-03
    • US13540923
    • 2012-07-03
    • Pervez M. AzizHiroshi KimuraAmaresh V. MalipatilHairong Gao
    • Pervez M. AzizHiroshi KimuraAmaresh V. MalipatilHairong Gao
    • H03H7/30
    • H04L25/14H04L25/03057H04L25/03885H04L2025/0349H04L2025/03579
    • Described embodiments receive a signal by a set of fixed taps and a set of floating taps of a receiver, each tap corresponding to a detected symbol. Each of the floating taps is stored in a corresponding shift register to account for process, operating voltage and temperature (PVT) variations of the receiver without calibration of delay elements. Multiplexing logic selects (i) corresponding floating taps for equalization by coupling selected floating taps to the outputs of the fixed taps, and (ii) different phases of each possible floating tap position. The multiplexing logic prunes and/or amalgamates the phases of each possible floating tap position and selects floating taps based on a magnitude of each phase. A combiner adjusts each output value of the fixed taps and the selected floating taps by a corresponding tap-weight, combines the adjusted values into an output signal and subtracts the output signal from the input signal.
    • 描述的实施例通过一组固定抽头和接收器的一组浮动抽头接收信号,每个抽头对应于检测到的符号。 每个浮动抽头存储在相应的移位寄存器中,以解决接收器的过程,工作电压和温度(PVT)变化,而不校准延迟元件。 多路复用逻辑通过将选定的浮动抽头耦合到固定抽头的输出端,选择(i)相应的浮动抽头进行均衡,以及(ii)每个可能的浮动抽头位置的不同相位。 多路复用逻辑修剪和/或合并每个可能的浮动抽头位置的相位,并且基于每相的幅度选择浮动抽头。 组合器通过相应的抽头调整固定抽头和所选浮动抽头的每个输出值,将调整后的值组合成输出信号,并从输入信号中减去输出信号。
    • 8. 发明申请
    • ELECTRIC FAN
    • 电扇
    • US20130287605A1
    • 2013-10-31
    • US13978786
    • 2012-01-10
    • Hiroshi KimuraHiroki MasuyamaKeiichi HosoiShinya Saito
    • Hiroshi KimuraHiroki MasuyamaKeiichi HosoiShinya Saito
    • F04B17/03
    • F04B17/03F04D25/0613F04D29/083H02K5/10H02K7/14
    • This electric fan has a rotation shaft that is provided rotatably with respect to a stator, a rotor yoke provided on the rotation shaft and formed in a bottomed cylindrical shape so as to cover the stator from a front surface, and a bracket that fixes the stator to a fan shroud and is formed so as to cover a rear surface of the stator, with a fan body provided so as to integrally rotate with the rotation shaft and the rotor yoke. The fan body has a fan boss formed in a bottomed cylindrical shape so as to cover the rotor yoke from a front surface, and a plurality of blades that is provided protruding radially from an outer circumferential surface of the fan boss. A first labyrinth portion is provided between an opening portion of the fan boss and the fan shroud.
    • 该电动风扇具有相对于定子可旋转地设置的旋转轴,设置在旋转轴上并形成为有底圆筒形以便从前表面覆盖定子的转子轭,以及将定子 形成为覆盖定子的后表面的风扇罩,其设置为与旋转轴和转子轭一体地旋转。 风扇主体具有形成为有底圆筒形状的风扇凸起,以从前表面覆盖转子磁轭,以及从风扇凸台的外周表面径向设置的多个叶片。 第一迷宫部分设置在风扇凸台的开口部分和风扇罩之间。
    • 10. 发明授权
    • Method of producing pre-oxidation fiber and carbon fiber
    • 生产预氧化纤维和碳纤维的方法
    • US08236273B2
    • 2012-08-07
    • US12747386
    • 2008-12-10
    • Taro OyamaRie KawahitoHiroshi Kimura
    • Taro OyamaRie KawahitoHiroshi Kimura
    • D01F9/12
    • D01F9/225
    • There is disclosed a method of producing a pre-oxidation fiber in the production of the pre-oxidation fiber by subjecting a polyacrylic precursor fiber to pre-oxidation processing in an oxidizing atmosphere, including shrinking the precursor fiber as a pretreatment of pre-oxidation at a load of 0.58 g/tex or less in the temperature range of 220 to 260° C. under conditions in which the degree of cyclization (I1620/I2240) of the precursor fiber measured by a Fourier transform infrared spectrophotometer (FT-IR) does not exceed 7%, initially-drawing the precursor fiber at a load of 2.7 to 3.5 g/tex in an oxidizing atmosphere at 230 to 260° C. in the ranges of the degree of cyclization of not exceeding 27% and of the density of not exceeding 1.2 g/cm3, and then subjecting the pre-oxidation fiber to pre-oxidation treatment. A carbon fiber of high strength and high elasticity that is appropriate for composite materials that exhibit high composite performance is obtained by continuously subjecting this pre-oxidation fiber to carbonization treatment.
    • 公开了通过在氧化气氛中对聚丙烯酸前驱体纤维进行预氧化处理来制造预氧化纤维的方法,包括将前体纤维收缩为预氧化的预处理 在通过傅立叶变换红外分光光度计(FT-IR)测量的前体纤维的环化度(I1620 / I2240)的条件下,在220〜260℃的温度范围内的负载为0.58g / tex以下 不超过7%,首先在230〜260℃的氧化性气氛中,在2.7〜3.5g / tex的负荷下拉伸前体纤维,其环化度不超过27%,密度为 不超过1.2g / cm 3,然后对预氧化纤维进行预氧化处理。 通过对该预氧化纤维进行碳化处理,可以获得适用于复合性高的复合材料的高强度,高弹性的碳纤维。