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    • 1. 发明授权
    • Compound semiconductor having a doped layer between the gate and an ohmic contact of an active region
    • 化合物半导体在栅极与有源区的欧姆接触之间具有掺杂层
    • US06787817B2
    • 2004-09-07
    • US10318244
    • 2002-12-13
    • Hiroyuki TakazawaShinichiro TakataniMasao YamaneMasayoshi Kobayashi
    • Hiroyuki TakazawaShinichiro TakataniMasao YamaneMasayoshi Kobayashi
    • H01L310328
    • H01L29/66462H01L29/0657H01L29/7783
    • The present invention provides a semiconductor device for high frequency application having a high breakdown voltage and the method of manufacturing thereof. A region including a first conductivity type high impurity concentration semiconductor and a region including a first conductivity type low impurity concentration semiconductor are provided from an ohmic layer side at the side far from a semiconductor substrate of the end surface of a barrier layer opposite the semiconductor substrate and between the ohmic layer and a gate electrode. The sheet impurity concentration of the region including a first conductivity type low impurity concentration semiconductor is set to be lower than that between the bottom surface of the gate electrode at the side of the semiconductor substrate and the end surface of the channel layer opposite the semiconductor substrate. The sheet impurity concentration of the region including a first conductivity type high impurity concentration semiconductor is set to be higher than that of the region including a first conductivity type low impurity concentration semiconductor.
    • 本发明提供一种具有高击穿电压的高频应用的半导体器件及其制造方法。 包括第一导电型高杂质浓度半导体的区域和包括第一导电型低杂质浓度半导体的区域从远离半导体衬底的阻挡层的端面的半导体衬底的一侧的欧姆层侧提供 并且在欧姆层和栅电极之间。 包括第一导电型低杂质浓度半导体的区域的片状杂质浓度被设定为低于半导体衬底侧的栅电极的底表面和与半导体衬底相对的沟道层的端面之间的片状杂质浓度 。 将包括第一导电型高杂质浓度半导体的区域的片状杂质浓度设定为高于包含第一导电型低杂质浓度半导体的区域的片状杂质浓度。
    • 9. 发明申请
    • Vehicular communications apparatus and method
    • 车载通信装置及方法
    • US20050156756A1
    • 2005-07-21
    • US11030290
    • 2005-01-07
    • Susumu FujitaToru TakagiMasao YamaneToshiro MuramatsuOkihiko Nakayama
    • Susumu FujitaToru TakagiMasao YamaneToshiro MuramatsuOkihiko Nakayama
    • G08G1/09G08G1/123G08G1/16H04B7/26G08G1/00
    • G08G1/123
    • A vehicular communications apparatus is configured to calculate information on relative positions, relative velocities, and relative moving directions between own vehicle and other vehicles at a point such as a junction where other vehicles tend to affect running of the own vehicle, and to search for and decide other vehicles which are to be opponents of radio communications, based on a calculated result, and communication opponents are decided from among the searched other vehicles, and radio communications are conducted therewith, and then, the vehicular communications apparatus obtains information on the other vehicles, in a time-sequential manner and by radio communications, and present the information to a driver of the own vehicle from time to time, thereby causing the driver to recognize dynamic information on the other vehicles, enabling the own vehicle to smoothly join a flow of traffic at a junction, for example.
    • 车辆通信装置被配置为在其他车辆倾向于影响本车辆的行驶的点处,计算本车辆与其他车辆之间的相对位置,相对速度和相对移动方向的信息,并且搜索和 根据计算结果,决定其他作为无线电通信对手的车辆,并从所搜索到的其他车辆中确定通信对手,并进行无线电通信,然后,车辆通信装置获取关于其他车辆的信息 以时间顺序的方式和通过无线电通信,不时地将信息呈现给本车辆的驾驶员,从而使驾驶员识别其他车辆上的动态信息,使得本车能够平稳地加入流 例如在交汇处的交通。
    • 10. 发明授权
    • Power amplifier system and mobile communication terminal device
    • 功率放大器系统和移动通信终端设备
    • US06678507B1
    • 2004-01-13
    • US09653623
    • 2000-08-31
    • Atsushi KurokawaMasao Yamane
    • Atsushi KurokawaMasao Yamane
    • H01Q1112
    • H03F3/245H03F3/195H03F2200/411
    • A power amplifier system has a high frequency power amplifier circuit section employing source-grounded enhancement type n-channel MESFETs for receiving a drain bias voltage and a gate bias voltage of zero volts or positive low potentials supplied from a unipolar power supply, and amplifying a superposed input signal therewith to output an amplified signal indicative of a change in drain currents. An output matching circuit section applies impedance matching to the amplified signal and outputs the resultant signal. A gate bias voltage circuit section supplies a gate bias voltage to the high frequency power amplifier circuit. When a forward direct current gate voltage is applied to a gate terminal with a source terminal coupled to ground, the DC gate voltage becomes greater than or equal to 0.65 volts, the DC gate voltage causing a gate current value per gate width of 100 micrometers to exceed 100 microamperes.
    • 功率放大器系统具有采用源极接地增强型n沟道MESFET的高频功率放大器电路部分,用于接收从单极电源提供的漏极偏置电压和零伏的栅极偏置电压或正低电位,并且放大 叠加输入信号以输出表示漏极电流变化的放大信号。 输出匹配电路部分对放大的信号施加阻抗匹配并输出结果信号。 栅极偏压电路部分向高频功率放大器电路提供栅极偏置电压。 当正向直流栅极电压施加到具有耦合到地的源极端子的栅极端子时,DC栅极电压变得大于或等于0.65伏,DC栅极电压使得每个栅极宽度的栅极电流值为100微米, 超过100微安。