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    • 14. 发明专利
    • High-frequency switch
    • 高频开关
    • JP2012249090A
    • 2012-12-13
    • JP2011119379
    • 2011-05-27
    • Mitsubishi Electric Corp三菱電機株式会社
    • SAMEJIMA FUMINORIKOHAMA MASAHIKOMORIMOTO TAKAO
    • H01P1/15H04B1/44
    • H03K17/74H01P1/15H03K17/76H04B1/48
    • PROBLEM TO BE SOLVED: To provide a small high-frequency switch that does not require a control signal from the outside.SOLUTION: A high-frequency switch has: a first anti-parallel diode having one end connected with a first high-frequency signal input/output terminal and the other end connected to a second high-frequency signal input/output terminal; a first transmission line having one end connected to the first high-frequency signal input/output terminal and the other end connected to a third high-frequency signal input/output terminal, and having an electric length of 1/4 wavelength in a use frequency; and a second anti-parallel diode having one end connected to the third high-frequency signal input/output terminal and the other end connected to the ground. The first and second anti-parallel diodes are in a conduction state at power equal to or more than predetermined high-frequency power.
    • 要解决的问题:提供不需要来自外部的控制信号的小型高频开关。 解决方案:高频开关具有:第一反并联二极管,其一端与第一高频信号输入/输出端连接,另一端连接到第二高频信号输入/输出端; 第一传输线,其一端连接到第一高频信号输入/输出端,另一端连接到第三高频信号输入/输出端,并且在使用频率中具有1/4波长的电长度 ; 以及第二反并联二极管,其一端连接到第三高频信号输入/输出端子,另一端连接到地。 第一和第二反并联二极管的功率处于等于或大于预定高频功率的导通状态。 版权所有(C)2013,JPO&INPIT
    • 17. 发明专利
    • Switching device
    • 切换设备
    • JP2009159222A
    • 2009-07-16
    • JP2007334074
    • 2007-12-26
    • Sanken Electric Co Ltdサンケン電気株式会社
    • MACHIDA OSAMUIWABUCHI AKIO
    • H03K17/687H01L21/338H01L21/8234H01L27/06H01L27/088H01L27/095H01L29/778H01L29/812H03K17/10H03K17/693
    • H03K17/6874H01L27/0605H01L29/0657H01L29/1075H01L29/2003H01L29/205H01L29/7787H01L29/7838H01L29/812H01L29/872H03K17/10H03K17/567H03K17/74H03K2017/6875
    • PROBLEM TO BE SOLVED: To request cost reduction and increase of high voltage resistance of a bidirectional switch. SOLUTION: A switching device 10 with a bidirectional switch function includes: a first and a second main terminals 11, 12; a normally-on type main semiconductor switching element 13 of a HEMT (High Electron Mobility Transistor) configuration; a first MOSFET (Metal Oxide Semiconductor Field Effect Transistor) 14 of a low voltage resistance normally-off type bonded between the first main terminal 11 and a first main electrode 20 of a main semiconductor switching element 13; a second MOSFET 15 of a low voltage resistance normally-off type connected between the second main terminal 12 and the main semiconductor switching element 13; a first and a second diodes 16, 17 connected in parallel in an inverse direction to the first and the second MOSFETs 14, 15; and a third and a fourth diodes 18, 19 connected between a gate electrode 22 of the main semiconductor switching element 13 and the first and the second main terminals 11, 12. The switching device 10 has a normally-off characteristic. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:要求降低成本并提高双向开关的高耐压性。 解决方案:具有双向开关功能的开关装置10包括:第一和第二主端子11,12; HEMT(高电子迁移率晶体管)构造的常开型主半导体开关元件13; 在第一主端子11和主半导体开关元件13的第一主电极20之间接合的低电压电阻常闭型的第一MOSFET(金属氧化物半导体场效应晶体管)14; 连接在第二主端子12和主半导体开关元件13之间的低压电阻常闭型的第二MOSFET 15; 与第一和第二MOSFET 14,15反向并联连接的第一和第二二极管16,17; 以及连接在主半导体开关元件13的栅电极22与第一和第二主端子11,12之间的第三和第四二极管18,19.开关器件10具有常关特性。 版权所有(C)2009,JPO&INPIT
    • 18. 发明专利
    • Gate drive circuit
    • 门控驱动电路
    • JP2009071956A
    • 2009-04-02
    • JP2007236671
    • 2007-09-12
    • Mitsubishi Electric Corp三菱電機株式会社
    • HIYAMA KAZUAKI
    • H02M1/08H02M7/5387H03K17/08H03K17/56
    • H03K17/168H03K17/08128H03K17/163H03K17/284H03K17/567H03K17/74H03K2217/0036
    • PROBLEM TO BE SOLVED: To provide a gate drive circuit with an element improvded in switching characteristics wherein it is possible to arbitrarily determine the switching characteristics of the element, obtain a sufficient tolerance against short-circuiting, and suppress steady-state loss. SOLUTION: The gate drive circuit includes an on-side circuit that performs on-operation of the gate of a power switching element. The on-side circuit includes: a first on-side power supply circuit having a first on-power source for supplying first on-voltage, a first on-wiring, and a first on-switch controlled according to a gate driving signal and formed in the first on-wiring; and a second on-side power supply circuit having a second on-power source for supplying second on-voltage to be applied to the gate when the power switching element is in steady state, a second on-wiring, a second on-switch formed in the second on-wiring, and an on-side delay circuit that transmits the gate driving signal to the second on-switch with delay. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了提供具有改进的开关特性的元件的栅极驱动电路,其中可以任意地确定元件的开关特性,获得足够的短路容限,并抑制稳态损耗 。 解决方案:栅极驱动电路包括执行功率开关元件的栅极的接通操作的旁路电路。 旁路电路包括:具有用于提供第一导通电压的第一导通电源的第一旁路电源电路,第一在线布线和根据栅极驱动信号控制的第一开关电路,并形成 在第一次接线时; 以及第二旁路电源电路,具有第二导通电源,用于在功率开关元件处于稳定状态时提供要施加到栅极的第二导通电压,第二导通,形成第二导通开关 在第二接线中,以及一个侧面延迟电路,其延迟地将栅极驱动信号传输到第二开关。 版权所有(C)2009,JPO&INPIT
    • 19. 发明专利
    • Light-emitting device
    • 发光装置
    • JP2008288231A
    • 2008-11-27
    • JP2007128779
    • 2007-05-15
    • Citizen Electronics Co Ltdシチズン電子株式会社
    • BETSUDA SOHIKOIMAI SADATOFUKAZAWA KOICHI
    • H01L33/56H01L33/62
    • H03K17/12H01L2224/32225H01L2224/48091H01L2224/49113H01L2224/73265H03K17/74H01L2924/00014
    • PROBLEM TO BE SOLVED: To provide a highly reliable light-emitting device having favorable balance in current by configuring a light-emitting diode package in such a way that various kinds of light-emitting diode chips are connected in parallel while suppressing variations in VF characteristics of the diode chips which have not been covered by a prior art. SOLUTION: The light-emitting diode package is configured so that the light-emitting diode chips are connected in parallel while using two characteristic conditions crossing through three points A, B and C as a selection reference in forward voltage-forward current characteristics. The current at the point B is set at 1/2 of a rated current, and thus, the current of each light-emitting diode chip in the light-emitting diode package satisfies the current value of ≥50% of the rated current. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了提供一种高可靠性的发光装置,其通过配置发光二极管封装使电流平衡良好,使得各种发光二极管芯片并联连接,同时抑制变化 在现有技术未被覆盖的二极管芯片的VF特性中。

      解决方案:发光二极管封装被配置为使得发光二极管芯片并联连接,同时使用穿过三个点A,B和C的两个特征条件作为正向电压 - 正向电流特性中的选择参考 。 点B处的电流设定为额定电流的1/2,因此,发光二极管封装中的各发光二极管芯片的电流满足电流值≥50%的电流值。 版权所有(C)2009,JPO&INPIT