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    • 2. 发明授权
    • Noise reduction system
    • 降噪系统
    • US4571511A
    • 1986-02-18
    • US508287
    • 1983-06-27
    • Robert A. DischertWilliam H. MeiseClement A. Berard, Jr.
    • Robert A. DischertWilliam H. MeiseClement A. Berard, Jr.
    • H04N5/21H03K5/08
    • H04N5/21
    • A noise reduction circuit which operates on the principle of coring includes a variable offset potential source in series with one diode which is connected antiparallel with a second diode. The output terminal of the parallel circuit is connected to an integrating capacitor so that the turn-on potential of the diode circuit floats with the output potential. The variable offset potential source is responsive to the output potential to apply varying forward or back bias to one of the diodes and thereby change the coring threshold of the diode dependent upon signal amplitude. The variable offset potential source consists of a resistor connected between two variable current sources configured to provide equal currents of opposite polarity thereto. A digital implementation is also included.
    • 以取芯原理工作的噪声降低电路包括与一个二极管串联的可变偏置电位源,该二极管与第二二极管反平行连接。 并联电路的输出端子连接到积分电容器,使得二极管电路的导通电位与输出电位相垂直。 可变偏置电位源响应于输出电位以向二极管之一施加变化的正向或反向偏置,从而根据信号幅度改变二极管的取芯阈值。 可变偏移电位源由连接在两个可变电流源之间的电阻器构成,以提供相反极性的相等电流。 还包括数字实现。
    • 3. 发明授权
    • Error correction arrangement for imagers
    • 成像仪误差校正装置
    • US4481539A
    • 1984-11-06
    • US458634
    • 1983-01-17
    • William H. MeiseRobert A. Dischert
    • William H. MeiseRobert A. Dischert
    • H04N5/367H04N5/372H04N5/36H04N5/21
    • H04N5/2173
    • Two or more CCD imagers, which have random defects are optically coupled to form a single image. The CCD's are in registry. Because of the random nature of the location of the defects, the defective photosensors of one imager are aligned with good photosensors of another. Memories keep track of which locations of which CCD are defective. The imagers are operated synchronously and the signals from good photosensor locations are summmed for improved signal-to-noise ratio. When a location is addressed at which one imager has a defective photosensor, the respective memory decouples it from the good photosensor of the other imager. The signal level is restored for that pixel by increasing the gain of a preamp by the correct amount. If the imagers are made from the same mask, they may have almost identically corresponding defective photosensors. Then one imager is mounted upside-down relative to the other and scanned backwards so the defects do not coincide.
    • 具有随机缺陷的两个或更多个CCD成像器被光耦合以形成单个图像。 CCD的注册表。 由于缺陷的位置的随机性质,一个成像器的有缺陷的光电传感器与另一个成像器的良好光电传感器对准。 记忆记录哪些CCD有缺陷的位置。 成像器被同步操作,来自良好光电传感器位置的信号被加总以提高信噪比。 当一个位置被寻址到哪一个成像器具有有缺陷的光电传感器时,相应的存储器将其与另一个成像器的良好的光电传感器分离。 通过将前置放大器的增益增加正确的量来恢复该像素的信号电平。 如果成像器由相同的掩模制成,则它们可能具有几乎相同的相应的有缺陷的光电传感器。 然后,一个成像器相对于另一个倒置安装,向后扫描,因此缺陷不一致。
    • 6. 发明授权
    • Electrically positionable short-circuits
    • 电位置短路
    • US4843358A
    • 1989-06-27
    • US211102
    • 1988-06-20
    • William H. MeiseArye RosenPaul J. Stabile
    • William H. MeiseArye RosenPaul J. Stabile
    • H01L29/423H01L29/78H01L29/868H01L45/02H01P1/185H01P1/20H01P1/28H01P7/00
    • H01L45/02H01L29/42368H01L29/78H01L29/868H01P1/185H01P1/20H01P1/28H01P7/00
    • An electrical short-circuit for alternating-current (ac) microwave signals is physically positionable in direct response to an electrical bias control without an intermediary electromechanical converter. The electrically positionable short circuit includes at least first and second doped regions in a semiconductor, separated by a region in which the short circuit is formed between the doped regions by the bias. A first embodiment comprises discrete diodes connected between conductors at different locations, the discrete diodes having different forward junction voltages, so that varying the common bias voltage varies the number of conducting diodes and thus positions the short circuit in a stepwise manner. A FET embodiment includes various discrete MOSFETs having different conduction threshold voltages, and having their sources and drains connected at various points to the conductors to be short-circuited, so that variations of a common gate bias voltage selectively render one or more of the FETs conductive, thereby stepwise positioning the short-circuit. Distributed PIN and MOSFET structures provide continuous short circuit positioning as a monotonic function of bias. Two distinct modes of operation, pinchoff/resistive and a resistive/below-threshold are possible for the distributed FET embodiment. The electrically positionable short-circuit can be coupled to the conductors of a transmission line for effecting tuning, or can be coupled to a transmission line in such a way as to vary the signal path length and thereby provide phase shift.
    • 交流(ac)微波信号的电气短路可以直接响应于电偏压控制而物理定位,而无需中间机电转换器。 电可定位短路包括在半导体中的至少第一和第二掺杂区域,由通过偏压在掺杂区域之间形成短路的区域分开。 第一实施例包括连接在不同位置的导体之间的分立二极管,分立二极管具有不同的正向结电压,使得改变公共偏置电压改变导通二极管的数量,从而以逐步的方式定位短路。 FET实施例包括具有不同导通阈值电压的各种分立MOSFET,并且其源极和漏极在不同点处连接到要短路的导体,使得公共栅极偏置电压的变化选择性地使一个或多个FET导通 ,从而逐步定位短路。 分布式PIN和MOSFET结构提供连续的短路定位作为偏置的单调函数。 对于分布式FET实施例,两种不同的操作模式,引脚/电阻和电阻/低于阈值是可能的。 可电气定位的短路可以耦合到传输线的导体,用于实现调谐,或者可以以这样的方式耦合到传输线,以便改变信号路径长度,从而提供相移。
    • 8. 发明授权
    • Light polarization transformer
    • 光偏振变压器
    • US06389185B1
    • 2002-05-14
    • US09755112
    • 2001-01-08
    • William H. MeiseHarvey L. WagnerThomas W. Karras
    • William H. MeiseHarvey L. WagnerThomas W. Karras
    • G02B600
    • G02B6/274G02B6/105G02B6/2766
    • An optical fiber that transforms light of undesired polarization into light of desired polarization. In principle, the signal power of the non-preferred polarization is transformed into signal power of the preferred polarization, thereby actually transforming the polarization. The fiber can have a circular end for input of light having randomly phased polarization, and an elongated end for output of light having a single principal orientation component. A generally smooth transition from the circular end to the elongated end causes substantially all the light entering the fiber to exit from the fiber without losing light due to reflection or radiation. Alternatively, the fiber can have a lobed end, for input of light having first and second mutually orthogonal polarization components, and an elongated end, for output of light having a single principal orientation component. Alternatively, the fiber can be a combination of the two forms described above. That is, the fiber can have a circular section that transforms first into a lobed section with increasing distance from the input port, with the lobed section then transforms into an elongated (e.g., elliptical or ovoid) section with increasing distance from the input port.
    • 将不想要的偏振光转换成所需偏振光的光纤。 原则上,非优选极化的信号功率被转换为优选极化的信号功率,从而实际上转换极化。 纤维可以具有用于输入具有随机相位偏振的光的圆形端,以及用于输出具有单个主取向分量的光的细长端。 从圆形端到细长端的大致平滑的过渡导致基本上进入光纤的所有光从纤维离开而不会由于反射或辐射而损失光。 或者,光纤可以具有叶结端,用于输入具有第一和第二相互正交的偏振分量的光,以及细长端,用于输出具有单个主取向分量的光。 或者,纤维可以是上述两种形式的组合。 也就是说,纤维可以具有圆形部分,该部分首先变成具有距离输入端口的距离增加的裂片部分,然后叶部分随着与输入端口的距离增加而变换成细长(例如,椭圆形或卵形)部分。
    • 9. 发明授权
    • Adjustable waveguide branch, and directional coupler
    • 可调波导分支和定向耦合器
    • US5247268A
    • 1993-09-21
    • US817068
    • 1992-01-06
    • William H. Meise
    • William H. Meise
    • H01P5/04
    • H01P5/04
    • A rectangular waveguide series junction has a layer of photoconductive material in one branch near the junction. The photoconductive material, when dark, is essentially a dielectric, which effectively increases the dimension of the waveguide branch over what it would be if not modified, thereby increasing its impedance at the series junction and causing power division preferentially into the branch. When illuminated, as by a laser or LED, the photoconductive layer becomes a conductor instead of a dielectric, and the dieletric "increase" in the dimension is eliminated. Instead, the conductive material actually decreases the cross-section, to thereby reduce the actual impedance of the branch at the junction point. This reduces the amount of coupling below that for an unmodified waveguide branch. Thus, the amount of coupling into the branch at the junction is increased by the dielectric constant when the photoconductor is dark, and decreased by the conductivity when illuminated. A waveguide directional coupler includes one or more such controllable branches. Redundant light emitting diodes are located in slots adjacent the central seam of the directional coupler housing, for fine control of the coupling factor. Control may be applied to move nulls in the coupler isolation to reduce interference in antenna arrays, to adjust coupling to achieve improved channel-to-channel isolation, or to compensate for aging, or other changes of amplifiers or other circuit components.
    • 矩形波导串联结在接头附近的一个分支中具有一层光电导材料。 光电导材料在黑暗时基本上是电介质,其有效地增加波导分支的尺寸超过如果不被修改将是什么,从而增加其在串联结处的阻抗并且使功率分配优先进入分支。 当照亮时,如通过激光或LED,光电导层成为导体而不是电介质,并且消除了尺寸中的小心“增加”。 相反,导电材料实际上减小了横截面,从而降低了在连接点处的支路的实际阻抗。 这将耦合量降低到低于未修改的波导支路的耦合量。 因此,当光电导体较暗时,在结处的分支中的耦合量增加介电常数,并且在被照射时由导电性降低。 波导定向耦合器包括一个或多个这样的可控分支。 冗余发光二极管位于与定向耦合器壳体的中心接缝相邻的槽中,用于精细控制耦合因子。 可以应用控制来移动耦合器隔离中的零点,以减少天线阵列中的干扰,调整耦合以实现改进的信道至信道隔离,或补偿放大器或其他电路组件的老化或其他变化。