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    • 121. 发明公开
    • FET bias circuit
    • Vorspannungsschaltungfüreinen Feldeffekttstristor
    • EP1128548A2
    • 2001-08-29
    • EP01300842.0
    • 2001-01-31
    • JAPAN RADIO CO., LTD
    • Sakamoto Hironori, c/o Japan Radio Co. Ltd.Honda, Tamaki, c/o Japan Radio Co. Ltd.Takahashi, Taketo, c/o Japan Radio Co. Ltd.
    • H03F1/30
    • H03F1/306H03F2200/447H03F2200/75
    • A gate bias voltage (Vgsdc) of a FET is compared at an operational amplifier (A) with a reference voltage and closed-loop control is performed on the gate bias voltage (Vgsdc) of the FET with the output of the operational amplifier (A). The temperature characteristics of the mutual conductance of the FET is compensated by setting the temperature characteristics of one or both resistors (R1, R2). Variations in a drain bias current (Idsdc) due to input signal level and temperature changes can be suppressed. The circuit at the gate and the circuit at the drain are separate, making possible class A, class AB, and class B operations. The voltage drop at the gate resistor (Rg) can be ignored so that the gate resistor (Rg) can be designed with priority given to stability of the RF characteristics.
    • 在运算放大器(A)与参考电压比较FET的栅极偏置电压(Vgsdc),并且通过运算放大器(A)的输出对FET的栅极偏置电压(Vgsdc)执行闭环控制 )。 通过设置一个或两个电阻(R1,R2)的温度特性来补偿FET的互导的温度特性。 可以抑制由输入信号电平和温度变化引起的漏极偏置电流(Idsdc)的变化。 栅极电路和漏极电路是分开的,使A类,AB类和B类工作成为可能。 可以忽略栅极电阻(Rg)处的电压降,从而可以根据RF特性的稳定性优先设计栅极电阻(Rg)。
    • 122. 发明公开
    • Feed-foward amplifier and controller of the same
    • VorwärtsgekoppelterVerstärkerund Steuerschaltungdafür
    • EP1113574A2
    • 2001-07-04
    • EP00123876.5
    • 2000-11-02
    • JAPAN RADIO CO., LTD
    • Yamashita, KazuoIto, AkiraSakamoto, HironoriIto, KeijiroYamada, AkiraKawasumi, Norihisa
    • H03F1/32
    • H03F1/3235
    • A base pilot signal that is output from an oscillator (20) and a local oscillation signal that is output from an oscillator (21) are input to an injection-side mixer (22) so that two types of second pilot signals, sum frequency and difference frequency, are generated and injected into a distortion detection loop. Part of a signal appearing at an output terminal (2) is branched, converted in frequency by a detection-side mixer (23) using the local oscillation signal, filtered at a narrow-band filter (24), input to a synchronizing detector (25) with the filtered output as error signals (ErrI, ErrQ), and synchronizing detected with reference to the base pilot signal so as to generate control signals for a distortion rejection loop. The spectrums of the second pilot signals may be spread. A process to cancel the input signal component may be performed at the detection side. A simple circuit configuration enhances the distortion component rejection and suppression effect and shortens the time required until an optimum control state is established.
    • 从振荡器(20)输出的基本导频信号和从振荡器(21)输出的本地振荡信号被输入到注入侧混频器(22),使得两种类型的第二导频信号,和频和 差频产生并注入到失真检测回路中。 出现在输出端子(2)处的信号的一部分通过使用本地振荡信号的检测侧混频器(23)在频率上分频,在窄带滤波器(24)处被滤波,输入到同步检测器 25),滤波后的输出作为误差信号(ErrI,ErrQ),并且参考基准导频信号进行同步检测,以产生失真抑制环路的控制信号。 可以扩展第二导频信号的频谱。 可以在检测侧执行取消输入信号分量的处理。 简单的电路配置增强了失真分量抑制和抑制效果,并缩短了所需的时间,直到建立最佳控制状态。
    • 126. 发明公开
    • Three-dimensional radar apparatus and method for displaying three-dimensional radar image
    • 用于显示三维雷达图像的三维雷达装置和方法
    • EP0978730A3
    • 2000-11-22
    • EP99306153.0
    • 1999-08-03
    • JAPAN RADIO CO., LTD
    • Yamane, DaisakuSudo, Yuki
    • G01S7/20G01S7/298
    • G01S7/20G01S7/068G01S13/86
    • Disclosed is a three-dimensional radar apparatus comprising a radar transmitting/receiving unit (14), a three-dimensional polygon-generating unit (16), and a three-dimensional graphics unit (18), wherein a radar transmitter/receiver (20) outputs signals concerning orientation information, distance information, and reception intensity information on the basis of a radio wave reflected from a target, and a scan converter (22) is used to convert the signals concerning the orientation information, the distance information, and the reception intensity information into two-dimensional radar image data composed of two-dimensional rectangular coordinates and brightness information of each of picture elements. The two-dimensional radar image data is also inputted into the three-dimensional polygon-generating unit (16) to perform polygon-generating processing on the basis of the two-dimensional rectangular coordinates and the brightness information of each of the picture elements. Three-dimensional radar image data is prepared in the three-dimensional graphics unit (18) on the basis of obtained polygon-based information, and it is accumulated in a frame memory (24). Thus, a three-dimensional radar image is displayed on a display device (26).
    • 公开了一种三维雷达设备,其包括雷达发射/接收单元(14),三维多边形生成单元(16)和三维图形单元(18),其中雷达发射机/接收机 )基于从目标反射的无线电波输出关于方位信息,距离信息和接收强度信息的信号,并且扫描转换器(22)用于将关于方位信息,距离信息和 接收强度信息转换为由二维直角坐标和每个像素的亮度信息组成的二维雷达图像数据。 二维雷达图像数据也被输入到三维多边形产生单元(16)中,以基于每个图像元素的二维直角坐标和亮度信息执行多边形产生处理。 基于所获得的基于多边形的信息在三维图形单元(18)中准备三维雷达图像数据,并将其存储在帧存储器(24)中。 由此,在显示装置(26)上显示三维雷达图像。
    • 129. 发明公开
    • Image synthesis system
    • Bildsynthesesystem
    • EP0961223A2
    • 1999-12-01
    • EP99304010.4
    • 1999-05-24
    • JAPAN RADIO CO., LTD
    • Yamato, Sachio, Japan Radio Co., Ltd.Yamane, Daisaku, Japan Radio Co., Ltd.Ishikawa, Masashi, Japan Radio Co., Ltd.Kashiwade, Koji, Japan Radio Co., Ltd.Mimura, Toshiharu, Japan Radio Co., Ltd.Toeda, Kengo, Japan Radio Co., Ltd.
    • G06T1/20
    • G06T15/005
    • An image synthesis system comprises a volume memory (12) for accumulating entire volume data (32) after being divided into cubic data comprising units each of which is composed of eight pieces of volume data for constructing a small cube to make it possible to perform memory operation by using the units of the cubic data; an image processing unit (14) including a memory control unit (20), an inclination calculation unit (22), a brightness calculation unit (24), a synthesis calculation unit (26), and a coordinate conversion unit (28); an image display memory (16); and a display unit (18). The volume data is read from the volume memory (12) by using the units each of which is composed of eight voxels for constructing the small cube. The inclination calculation is performed by the inclination calculation unit (22), the brightness is calculated by the brightness calculation unit (24), and the synthesis calculation unit (26) is used to perform the synthesis calculation for the entire volume data (32) along voxels through which an arbitrarily set imaginary line of sight passes.
    • 一种图像合成系统,包括:体积存储器(12),用于在被分成包含单元的三维数据之后累积整个体积数据(32),每个单元由八个用于构造小立方体的体数据组成,以使得可以执行存储器 通过使用立方体数据的单位进行操作; 包括存储器控制单元(20),倾斜计算单元(22),亮度计算单元(24),合成计算单元(26)和坐标转换单元(28)的图像处理单元(14)。 图像显示存储器(16); 和显示单元(18)。 通过使用由用于构造小立方体的八个体素组成的单元从卷存储器(12)读取体数据。 由倾斜计算单元(22)进行倾斜计算,亮度由亮度计算单元(24)计算,合成计算单元(26)用于对整个体积数据(32)进行合成计算, 沿着体素,通过它们任意设定的虚拟视线通过。
    • 130. 发明公开
    • Antenna apparatus
    • 天线装置
    • EP0951090A2
    • 1999-10-20
    • EP99107565.6
    • 1999-04-15
    • JAPAN RADIO CO., LTD
    • Yoshida, Goro c/o Japan Radio Co., Ltd.
    • H01Q3/26G07B15/00G01S13/02
    • G07B15/063G01S13/758H01Q3/2647
    • An uplink transceiver circuit (16) of an in-vehicle transponder (12) is configured using a modulator (24) having reciprocal characteristics. A continuous wave received by an element antenna (26) is modulated by the reciprocal modulator (24) and re-radiated from an element antenna (28). Conversely, a continuous wave received by the element antenna (28) is modulated by the reciprocal modulator (24) and re-radiated from the element antenna (26). The signals re-radiated from these element antennas (26, 28) are an in-phase combination in the direction of the incoming continuous wave so that the directivity for transmission narrows and the gain increases. For the reception of the continuous wave, a broad receiving directivity, which each element antenna (26, 28) individually provides, can be realized.
    • 使用具有相互特性的调制器(24)来配置车载应答器(12)的上行链路收发器电路(16)。 由元件天线(26)接收的连续波由相互调制器(24)调制并从元件天线(28)重新辐射。 相反,由元件天线(28)接收的连续波由相互调制器(24)调制并从元件天线(26)重新辐射。 从这些元件天线(26,28)重新辐射的信号是在入射连续波方向上的同相组合,使得发射方向性变窄并且增益增加。 为了接收连续波,可以实现每个单元天线(26,28)单独提供的宽接收方向性。