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    • 4. 发明申请
    • Directional coupler switch
    • 定向耦合器开关
    • US20060188199A1
    • 2006-08-24
    • US11209856
    • 2005-08-24
    • Noritsugu YamamotoTohru Ogawa
    • Noritsugu YamamotoTohru Ogawa
    • G02B6/26G02B6/42
    • G02B6/2804G02B6/12007
    • The directional coupler switch is configured by a parallel waveguide including a first region which is subjected to a nonlinear action and a second region which is not subjected to a nonlinear action. A dispersion relationship of the first region is varied due to the nonlinear action to switch over an exit of light entering from an input side to cause the switch to function as an optical switch. A dispersion curve of the first region has: a region of a constant frequency in one of an even mode and an odd mode which are two kinds of eigen modes of the parallel waveguide; and a region in which gradients of the two eigen modes at frequencies belonging to a region other than the region of a constant frequency are substantially equal to each other. The gradients of the two kinds of eigen modes indicate monotone decreasing or monotone increasing.
    • 定向耦合器开关由包括经受非线性动作的第一区域和不经受非线性动作的第二区域的平行波导构成。 第一区域的色散关系由于非线性动作而变化,以切换从输入侧进入的光的出射,从而使开关用作光学开关。 第一区域的色散曲线具有:作为平行波导的两种本征模式的偶数模式和奇数模式之一的恒定频率的区域; 以及属于不同频率区域以外的区域的两个本征模式的梯度基本相等的区域。 两种本征模式的梯度表示单调递减或单调递增。
    • 6. 发明授权
    • Automatic gain control circuit for a demodulation section of a modem
    • 用于调制解调器解调部分的自动增益控制电路
    • US5448595A
    • 1995-09-05
    • US109044
    • 1993-08-19
    • Takashi KakuHiroyasu MurataTohru Ogawa
    • Takashi KakuHiroyasu MurataTohru Ogawa
    • H04L29/10H03G3/20H04L27/22H04L27/38H04L27/08
    • H03G3/3052H03G3/3042
    • An automatic gain control circuit which is provided in a demodulation section of a modem to adjust the loop gain so that the level of a band-limited receive signal may have a predetermined reference value and to output the receive signal to an automatic equalization section of the modem. The automatic gain control circuit is improved in that, even when a disturbance of the circuit such as a gain hit or a drop-out occurs, regular communication can be continued without requiring a data mode leading-in operation. The automatic gain control circuit includes a reference value setting unit for generating a reference value, an error calculation unit for determining an error signal between the receive signal and the reference value, a receive level variation correcting controlling force setting unit for setting a receive level variation correcting controlling force to be added to the error signal, an error signal correction unit for correcting the error signal, an error signal averaging unit for averaging the corrected error signal and a feedback unit for feeding back, as the receive signal, the averaged corrected error signal. The receive level variation correcting controlling force to be set by the receive level variation correcting controlling force setting unit is varied in response to the error signal.
    • 一种自动增益控制电路,其设置在调制解调器的解调部分中,以调整环路增益,使得带限接收信号的电平可以具有预定的参考值,并将接收信号输出到 调制解调器。 自动增益控制电路的改进在于,即使发生诸如增益命中或丢失之类的电路的干扰,可以继续进行常规通信,而不需要数据模式导入操作。 自动增益控制电路包括用于产生参考值的参考值设置单元,用于确定接收信号和参考值之间的误差信号的误差计算单元,用于设置接收电平变化的接收电平变化校正控制力设置单元 校正误差信号中的加权控制力,用于校正误差信号的误差信号校正单元,用于对校正误差信号进行平均的误差信号平均单元和用于反馈的反馈单元作为接收信号的平均校正误差 信号。 由接收电平变化校正控制力设定单元设定的接收电平变化校正控制力响应于误差信号而变化。
    • 9. 发明授权
    • Anti-reflective layer used to form a semiconductor device
    • 用于形成半导体器件的抗反射层
    • US5641607A
    • 1997-06-24
    • US535377
    • 1995-09-28
    • Tohru OgawaTetsuo Gocho
    • Tohru OgawaTetsuo Gocho
    • G03F7/09G03F7/20H01L21/02H01L21/027H01L21/3213H01L21/768G03C1/825
    • G03F7/091G03F7/70691H01L21/02071H01L21/0275H01L21/0276H01L21/32137H01L21/32139H01L21/76838Y10S430/151
    • A method of determining an optimum condition of an anti-reflective layer upon forming a resist pattern by exposure with a monochromatic light, forms the anti-reflective layer with these conditions and forms a resist pattern using a novel anti-reflective layer. The method comprises (I) forming an equi-contour line for the amount of absorbed light regarding a photoresist of an optional film thickness using the optical condition of the anti-reflective layer as a parameter, (II) conducting the same procedure as in (I) above for a plurality of resist film thicknesses, (III) finding a common region for the amount of absorbed light with respect to each of the traces obtained, thereby determining the optical condition for the anti-reflective layer, (IV) applying same procedures as described above while changing the condition of the anti-reflective layer, thereby determining the optical condition for the anti-reflective layer, and (V) determining the optimum optical condition such as the kind and the thickness of the anti-reflective layer under a certain condition of the anti-reflective layer.
    • 通过用单色光曝光形成抗蚀剂图案来确定抗反射层的最佳条件的方法,在这些条件下形成抗反射层,并使用新的抗反射层形成抗蚀剂图案。 该方法包括:(I)使用抗反射层的光学条件作为参数,形成关于可选膜厚度的光致抗蚀剂的吸收光量的等轮线,(II)进行与( 对于多个抗蚀剂膜厚度,(III)找到相对于所获得的每个迹线的吸收光量的公共区域,从而确定抗反射层的光学条件,(IV)施加相同的光刻条件 改变抗反射层的状态,从而确定抗反射层的光学条件,和(V)确定最佳光学条件,例如抗反射层的种类和厚度, 防反射层的一定条件。