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    • 2. 发明申请
    • ELECTRONIC APPARATUS
    • 电子设备
    • US20110286161A1
    • 2011-11-24
    • US12972250
    • 2010-12-17
    • Toshikazu SHIROISHITakayuki ARISAKAYasuyuki SUZUKI
    • Toshikazu SHIROISHITakayuki ARISAKAYasuyuki SUZUKI
    • H05K5/00
    • G06F1/1656G06F1/1613
    • According to one embodiment, an electronic apparatus comprises a first case includes a screw hole, a second case separated from the first case, and a screw passing through the screw hole to fix the second case to the first case. The first case comprises a metallic part includes an opening portion, a resin part formed integrally with the metallic part so as to cover the opening portion, a protrusion extending from the metallic part to be arranged on the resin part in a thickness direction, and a sheet-type block member located between the protrusion and resin part. The protrusion comprises an opening formed in a surface opposed to the resin part, and the screw hole extending from the opening to pass through the protrusion in the thickness direction, and the block member covers the opening.
    • 根据一个实施例,电子设备包括第一壳体,其包括螺钉孔,与第一壳体分离的第二壳体和穿过螺钉孔的螺钉,以将第二壳体固定到第一壳体。 第一壳体包括金属部分,其包括开口部分,与金属部分一体形成以覆盖开口部分的树脂部分,从金属部分延伸以在厚度方向上布置在树脂部分上的突起,以及 位于突出部和树脂部之间的片状块部件。 突出部包括形成在与树脂部相对的表面中的开口,并且从开口延伸的螺钉孔在厚度方向上穿过突起,并且块部件覆盖开口。
    • 8. 发明申请
    • SIGNAL AMPLIFIER FOR OPTICAL RECEIVER CIRCUIT
    • 用于光接收电路的信号放大器
    • US20100116969A1
    • 2010-05-13
    • US12529888
    • 2008-03-27
    • Yasuyuki SUZUKI
    • Yasuyuki SUZUKI
    • H03F3/08
    • H03F3/08
    • A signal amplifier connected to a photodetector that converts a received optical signal to a current signal includes: a preamplifier converting the current signal to voltage and supplying the resultant voltage signal; a main amplifier amplifying the voltage signal supplied from the preamplifier and in which at least the input stage is made up from a differential circuit; two or more follower circuits provided between the preamplifier and the main amplifier and supplied with the voltage signal; resistors of equal resistance provided for each follower circuit on the paths between the output of the preamplifier and each input of the main amplifier; and a capacitor having one end connected to one of the resistors and the other end connected to ground. A low-pass filter for detecting the average potential of the voltage signal is configured by the capacitor and the resistor that is connected to the capacitor.
    • 连接到光电检测器的信号放大器将接收的光信号转换为电流信号包括:前置放大器,将电流信号转换成电压并提供所得的电压信号; 放大从前置放大器提供的电压信号并且其中至少输入级由差分电路构成的主放大器; 在前置放大器和主放大器之间提供两个或更多个跟随器电路并提供电压信号; 在前置放大器的输出和主放大器的每个输入之间的路径上为每个跟随器电路提供相等电阻的电阻器; 以及电容器,其一端连接到一个电阻器,另一端连接到地。 用于检测电压信号的平均电位的低通滤波器由连接到电容器的电容器和电阻器构成。