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    Semiconductor device with scalable withstanding voltage
    7.
    发明授权
    Semiconductor device with scalable withstanding voltage 失效
    具有可承受电压的半导体器件

    公开(公告)号：US06624474B2

    公开(公告)日：2003-09-23

    申请号：US09943384

    申请日：2001-08-31

    申请人： Nobuyasu Kanekawa ,  Kohei Sakurai ,  Shoji Sasaki ,  Kenji Tabuchi ,  Mitsuru Watabe

    发明人： Nobuyasu Kanekawa ,  Kohei Sakurai ,  Shoji Sasaki ,  Kenji Tabuchi ,  Mitsuru Watabe

    IPC分类号： H01L2701

    CPC分类号： H01L27/12 ,  H01L21/76229 ,  H01L21/84 ,  Y10T307/747

    摘要： A semiconductor device comprises an embedded insulation layer 101 formed on a semiconductor substrate 100, plural power semiconductor elements 2, 3 formed on a semiconductor substrate 100 on the embedded insulation layer, a trench 4 formed on the semiconductor substrate and isolating between the power semiconductor elements, and an isolator 5 insulating and driving control electrodes of the power semiconductor elements, and the power semiconductor elements 2, 3 such as transistors can be used, being connected each other in series.

    摘要翻译： 半导体器件包括形成在半导体衬底100上的嵌入绝缘层101，形成在嵌入绝缘层上的半导体衬底100上的多个功率半导体元件2,3，形成在半导体衬底上的沟槽4，并且在功率半导体元件 隔离器5可以使用功率半导体元件的绝缘和驱动控制电极以及诸如晶体管的功率半导体元件2,3串联连接。

    Electric power converter with continuous stable noise reduction
    8.
    发明授权
    Electric power converter with continuous stable noise reduction 失效
    电力转换器具有连续稳定的降噪功能

    公开(公告)号：US06600295B2

    公开(公告)日：2003-07-29

    申请号：US09943386

    申请日：2001-08-31

    申请人： Nobuyasu Kanekawa ,  Kohei Sakurai ,  Kenji Tabuchi ,  Mitsuru Watabe ,  Shoji Sasaki

    发明人： Nobuyasu Kanekawa ,  Kohei Sakurai ,  Kenji Tabuchi ,  Mitsuru Watabe ,  Shoji Sasaki

    IPC分类号： G05F110

    CPC分类号： H02M3/156

    摘要： In order to ensures a stable reduction of noise level at all times, in the steps of switching input voltage with a switching element 10, smoothing the voltage of rectangular wave obtained by switching with a reactor L and capacitor Cf and outputting it, the voltage obtained by dividing the output voltage is compared with the sawtooth wave output from a sawtooth wave generator 14 by a comparator 12. When the switching signal in response to the result of this comparison is applied to the switching element 10, the counter 16 is actuated synchronously with the vertex of the sawtooth wave to perform opening/closing operation of the switch SW1. The time constant of the time constant circuit comprising a R0 and C is adjusted according to whether a resistor R1 is present or not, and the signals of frequencies f1 and f2 coming out of the sawtooth wave generator 14 are sequentially switched to be sent to the comparator 12. The peak of the switching noise is diffused in the frequency range by sequential selection of switching frequencies, and noise level is reduced by diffusion of noise energy.

    摘要翻译： 为了始终确保噪声电平的稳定降低，在利用开关元件10切换输入电压的步骤中，平滑通过用电抗器L和电容器Cf切换而获得的矩形波的电压并输出，获得的电压 通过将输出电压除以与比较器12的锯齿波发生器14输出的锯齿波进行比较，当将与该比较结果对应的切换信号应用于开关元件10时，计数器16与 锯齿波的顶点来执行开关SW1的打开/关闭操作。 根据是否存在电阻R1来调整包括R0和C的时间常数电路的时间常数，并且顺序地切换从锯齿波发生器14出来的频率f1和f2的信号被发送到 比较器12.开关噪声的峰值通过顺序选择开关频率而在频率范围内扩散，噪声电平通过噪声能量的扩散而减小。