利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

98 条记录 (耗时 0.025 秒)

    Sensorless brushless motor
    52.
    发明授权
    Sensorless brushless motor 失效
    无传感器无刷电机

    公开(公告)号：US07122985B2

    公开(公告)日：2006-10-17

    申请号：US10972968

    申请日：2004-10-25

    申请人： Atsushi Kikuchi

    发明人： Atsushi Kikuchi

    IPC分类号： H02P6/10 ,  H02P6/18

    CPC分类号： H02P6/182

    摘要： A sensorless brushless motor controls a rotational speed of a rotor by sequentially energizing a plurality of excitation coils constituting a stator in accordance with a logical product between an energizing timing signal generated on the basis of a back electromotive forces and a pulse width modulation signal to control a pulse width of the pulse width modulation signal, wherein back EMF induced in the plurality of excitation coils are respectively supplied to first and second comparator circuits each having a different reference voltage, respective output signals from the first and the second comparator circuits are sampled simultaneously at a predetermined cycle, and the energizing timing signal is generated at the time of the respective output signals from the first and the second comparator circuits becoming a high-level or a low-level during the sampling. The accuracy of rotor position detection by using a back EMF is improved.

    摘要翻译： 无传感器无刷电动机根据基于反电动势产生的通电定时信号与脉冲宽度调制信号之间的逻辑积顺序激励构成定子的多个励磁线圈来控制转子的转速，以控制 脉冲宽度调制信号的脉冲宽度，其中在多个激励线圈中感应的反电动势分别被提供给具有不同参考电压的第一和第二比较器电路，来自第一和第二比较器电路的相应输出信号被同时采样 并且在采样期间在来自第一和第二比较器电路的各个输出信号变为高电平或低电平时产生激励定时信号。 通过使用反电动势进行转子位置检测的精度得到改善。

    Two-dimensional noise shaping filter circuit
    54.
    发明授权
    Two-dimensional noise shaping filter circuit 失效
    二维噪声整形滤波电路

    公开(公告)号：US5388081A

    公开(公告)日：1995-02-07

    申请号：US986258

    申请日：1992-12-07

    申请人： Yoshitaka Hashimoto ,  Atsushi Kikuchi

    发明人： Yoshitaka Hashimoto ,  Atsushi Kikuchi

    IPC分类号： H03M7/36 ,  H04N5/21

    CPC分类号： H04N5/21

    摘要： A two-dimensional noise shaping filter circuit including a first adder for adding a feedback signal to the input signal A quantizer is provided for quantizing an output from the first adder. A second adder adds an output from the quantizer to the output from the first adder. A transfer function unit provides an output from the second adder with a two-dimensional transfer function so as to generate the feedback signal to be supplied to the first adder. Using the noise shaping filter circuit, it becomes possible to provide a video signal with a two-dimensional noise shaping process, not only for a present line but also for a preceding line and a succeeding line. White noises caused by the quantizing process can be moved towards corners of a square Brillouin zone. Noise levels can be decreased at desired locations, such as at a portion of the center of a screen having a lower spatial frequency.

    摘要翻译： 提供了包括用于将反馈信号与输入信号A量化器相加的第一加法器的二维噪声整形滤波器电路，用于量化来自第一加法器的输出。 第二加法器将量化器的输出与第一加法器的输出相加。 传递函数单元提供来自第二加法器的输出具有二维传递函数，以产生要提供给第一加法器的反馈信号。 使用噪声整形滤波器电路，可以提供具有二维噪声整形处理的视频信号，不仅对于当前行，而且还用于前一行和后续行。 由量化过程引起的白噪声可以移动到正方形布里渊区域的角落。 可以在期望的位置（例如在具有较低空间频率的屏幕的中心部分）处降低噪声水平。

    Method of configuring an n- th degree switched capacitor filter
    55.
    发明授权
    Method of configuring an n- th degree switched capacitor filter 失效
    配置第n级开关电容滤波器的方法

    公开(公告)号：US4803650A

    公开(公告)日：1989-02-07

    申请号：US846192

    申请日：1986-03-31

    申请人： Toshimichi Nishimura ,  Atsushi Kikuchi

    发明人： Toshimichi Nishimura ,  Atsushi Kikuchi

    IPC分类号： H03H17/02 ,  H03H19/00 ,  G06G7/02

    CPC分类号： H03H19/004

    摘要： An n-th degree switched capacitor filter having transfer characteristics expressed by a transfer function H(Z) can be configured by expanding the transfer function H(Z) to an n-element linear simultaneous state equation of n state voltages inclusive of an output voltage. The coefficients of the linear state equation a.sub.11 to a.sub.n2, b.sub.11 to b.sub.nn are determined in a range within which the filter circuit can be configured by hardware and further each state voltage is below a maximum output voltage. In practice, the filter is configured by plural leapfrog type differential operational amplifiers having base capacitors C.sub.o, plural transmission gates, and plural electric charge transfer capacitors C.sub.T so as to determine each coefficient on the basis of ratios C.sub.T /C.sub.o. The filter is realized by a monolithic integrated circuit (IC) and provided with a higher signal-to-noise (S/N) ratio and a wider dynamic range without deteriorating electrical characteristics and increasing cost.

    摘要翻译： 具有由传递函数H（Z）表示的传递特性的n次开关电容滤波器可以通过将传递函数H（Z）扩展到包括输出电压在内的n个状态电压的n元线性同时状态方程式 。 线性状态方程式a11至a2，b11至bnn的系数在其中可以通过硬件配置滤波器电路并且每个状态电压低于最大输出电压的范围内确定。 实际上，滤波器由具有基本电容器Co，多个传输门和多个电荷转移电容器CT的多个跨越式差分运算放大器构成，以便基于比率CT / Co来确定每个系数。 滤波器由单片集成电路（IC）实现，并具有更高的信噪比（S / N）比和更宽的动态范围，而不会降低电气特性并增加成本。

    Liquid discharge apparatus
    56.
    发明授权
    Liquid discharge apparatus 有权

    公开(公告)号：US11427008B2

    公开(公告)日：2022-08-30

    申请号：US17092868

    申请日：2020-11-09

    申请人： Atsushi Kikuchi ,  Kazuhisa Yoda

    发明人： Atsushi Kikuchi ,  Kazuhisa Yoda

    IPC分类号： B41J2/175 ,  B41J2/165

    摘要： A liquid discharge apparatus includes a head configured to discharge a liquid, and a discharge receptacle configured to receive the liquid discharged from the head at an installation position. The discharge receptacle includes a liquid holder configured to receive the liquid discharged from the head, and a support configured to detachably support the liquid holder. At least a part of the support is displaceable to a detachment position at which the liquid holder is detachable from the support, and the detachment position is lower than the installation position.