知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

610 条记录 (耗时 0.045 秒)

    Monolithic microwave circuit with thick conductors
    91.
    发明授权
    Monolithic microwave circuit with thick conductors 失效
    具有较厚导体的单片微波电路

    公开(公告)号：US5652173A

    公开(公告)日：1997-07-29

    申请号：US647386

    申请日：1996-05-09

    申请人： Manjin Jerome Kim

    发明人： Manjin Jerome Kim

    IPC分类号： H01L21/822 ,  H01L21/02 ,  H01L21/768 ,  H01L27/04 ,  H01L27/06 ,  H01L21/786

    CPC分类号： H01L28/24 ,  H01L21/76838 ,  H01L27/0605 ,  H01L28/10 ,  H01L28/40 ,  H01L2924/0002 ,  Y10S438/97

    摘要： A monolithic microwave integrated circuit (MMIC) is produced by a method which forms multilevel conductive members, including thick low-loss metallic members. The low-loss metallic members are particularly useful for forming inductors and interconnecting circuit components. The MMIC is formed on a thick oxide layer of a silicon-on-insulator structure having a high-resistivity silicon substrate to inhibit RF interaction with the substrate.

    摘要翻译： 单片微波集成电路（MMIC）通过形成多层导电构件的方法制造，包括厚的低损耗金属构件。 低损耗金属元件特别适用于形成电感器和互连电路元件。 MMIC形成在具有高电阻率硅衬底的绝缘体上硅结构的厚氧化物层上，以抑制RF与衬底的相互作用。

    Lamp controller with lamp status detection and safety circuitry
    92.
    发明授权
    Lamp controller with lamp status detection and safety circuitry 失效
    灯控制器带灯状态检测和安全电路

    公开(公告)号：US5650694A

    公开(公告)日：1997-07-22

    申请号：US415020

    申请日：1995-03-31

    申请人： Raj Jayaraman ,  Yongping Xia ,  Sreeraman Venkitasubrahmanian ,  Paul Leyten

    发明人： Raj Jayaraman ,  Yongping Xia ,  Sreeraman Venkitasubrahmanian ,  Paul Leyten

    IPC分类号： H05B41/282 ,  H05B41/298 ,  H05B41/392 ,  H05B41/14

    CPC分类号： H05B41/2828 ,  H05B41/2981 ,  H05B41/3925 ,  Y02B20/186 ,  Y10S315/05

    摘要： A ballast includes safety circuitry which senses lamp status through various phases of ballast operation. According to one feature, the ballast is prevented from supplying an output voltage upon initial energization of the ballast when a lamp is not present at the output terminals. The presence of a filament is sensed via a DC path extending through the filament heater windings of an output transformer. When the DC path is not complete, a control input, for example the power supply input of the ballast controller, is not provided with a voltage to start ballast operation. The DC path is also used to restart the ballast if a defective lamp is replaced with a good one. Over-voltage and capacitive mode detection is also disclosed to shut down ballast output upon lamp failure/removal.

    摘要翻译： 镇流器包括通过镇流器操作的各个阶段感​​测灯状态的安全电路。 根据一个特征，当在输出端子处不存在灯时，防止镇流器在初始通电时提供输出电压。 通过延伸穿过输出变压器的灯丝加热器绕组的DC路径来感测灯丝的存在。 当DC路径不完整时，控制输入（例如镇流器控制器的电源输入）没有提供用于启动镇流器操作的电压。 如果更换有故障的灯泡，则直流路径也用于重新启动镇流器。 还公开了过压和电容模式检测，以在灯故障/去除时关闭镇流器输出。

    Controller for a gas discharge lamp with variable inverter frequency and with lamp power and bus voltage control
    95.
    发明授权
    Controller for a gas discharge lamp with variable inverter frequency and with lamp power and bus voltage control 失效
    用于具有变频器频率和灯功率和总线电压控制的气体放电灯的控制器

    公开(公告)号：US5623187A

    公开(公告)日：1997-04-22

    申请号：US366337

    申请日：1994-12-28

    申请人： Paulo Caldeira ,  Lawrence Bourdillon ,  Antonius H. Holtslag ,  Jinrong Qian

    发明人： Paulo Caldeira ,  Lawrence Bourdillon ,  Antonius H. Holtslag ,  Jinrong Qian

    IPC分类号： H05B41/292 ,  H05B41/392 ,  G05F1/00

    CPC分类号： H05B41/3928 ,  H05B41/2928 ,  Y02B20/208 ,  Y10S315/07

    摘要： A high frequency HID ballast includes an inverter for operating the HID lamp at high frequency and an arc instability controller which detects and adjusts the operating frequency of the inverter to avoid acoustic resonance of the discharge arc. The ballast ensures that the power delivered to the lamp remains substantially constant despite variations in the gain of the inverter which occur with changes in the operating frequency. Power control is accomplished by sensing lamp power and controlling a boost converter to vary the bus voltage feeding the inverter. The boost converter is also controlled during lamp ignition, when the load provided by the HID lamp is low, to clamp the bus voltage at a predetermined level. The ballast employs universal techniques suitable for operating HID lamps of different types, wattages and manufacturers despite the occurrence of acoustic resonance/arc instabilities among these lamps over a fairly broad frequency range.

    摘要翻译： 高频HID镇流器包括用于高频操作HID灯的逆变器和检测并调节逆变器的工作频率以避免放电电弧的声共振的电弧不稳定性控制器。 镇流器确保尽管随着工作频率的变化而发生变频器的增益的变化，但输送到灯的功率保持基本恒定。 功率控制通过检测灯功率和控制升压转换器来改变馈送逆变器的总线电压来实现。 在灯点亮期间，当HID灯提供的负载较低时，也可以控制升压转换器，以将总线电压钳位在预定的电平。 镇流器采用通用技术，适用于操作不同类型，功率和制造商的HID灯，尽管在相当宽的频率范围内这些灯之间发生声共振/电弧不稳定。

    Beam combiner for LCD projector utilizing a penta-prism
    96.
    发明授权
    Beam combiner for LCD projector utilizing a penta-prism 失效
    光束组合器用于使用五棱镜的LCD投影机

    公开(公告)号：US5619284A

    公开(公告)日：1997-04-08

    申请号：US375333

    申请日：1995-01-17

    申请人： Stephen Magocs

    发明人： Stephen Magocs

    IPC分类号： G03B33/12 ,  G02B27/14 ,  G02F1/13 ,  G02F1/1335 ,  G03B21/00 ,  G09F9/00 ,  H04N9/31 ,  H04N5/74

    CPC分类号： G02B27/145 ,  H04N9/3105 ,  H04N9/3164

    摘要： A beam combiner for an LCD projection television system makes use of a penta-prism which focuses three separate light sources on a viewing screen. The use of a penta-prism as a beam combiner allows for a compact light path, simplicity of manufacturing and a cost effective dichroic mirror arrangement as part of the penta prism. The light path within the penta-prism from the three light sources forms a right-angled triangle which provides the above-identified advantages.

    摘要翻译： 用于LCD投影电视系统的光束组合器利用将三个独立的光源聚焦在观看屏幕上的五棱镜。 使用五棱镜作为光束组合器允许紧凑的光路，制造的简单性和作为五棱镜的一部分的成本有效的二向色镜布置。 来自三个光源的五棱镜内的光路形成直角三角形，其提供上述优点。

    Apparatus and methods for improving timing recovery of a system clock
    97.
    发明授权
    Apparatus and methods for improving timing recovery of a system clock 失效
    用于改善系统时钟的定时恢复的装置和方法

    公开(公告)号：US5612981A

    公开(公告)日：1997-03-18

    申请号：US196918

    申请日：1994-02-15

    申请人： Cornelis M. Huizer

    发明人： Cornelis M. Huizer

    IPC分类号： H04N7/26 ,  H03L1/00 ,  H03L7/06 ,  H03L7/10 ,  H03L7/18 ,  H04L7/033 ,  H04N5/12 ,  H04N21/43 ,  H03D3/24

    CPC分类号： H04N5/126 ,  H03L1/00 ,  H03L7/10 ,  H03L7/18 ,  H04N21/4305

    摘要： Apparatus and methods for improving timing recovery of a system clock by causing its frequency to be within a specified tolerance range during a timing recovery acquisition period for the system clock. The apparatus includes a voltage controlled oscillator for producing the system clock and a non-volatile memory containing an offset value. The non-volatile memory provides an offset value (representing an offset voltage value) which assures that the voltage controlled oscillator receives a voltage value which causes the frequency of the system clock to be within a specified tolerance range. The apparatus may also include a write control unit for determining and updating the offset value for a next timing recovery acquisition period. The methods include steps for performing these operations.

    摘要翻译： 用于通过在系统时钟的定时恢复获取周期期间使其频率在指定的公差范围内来改善系统时钟的定时恢复的装置和方法。 该装置包括用于产生系统时钟的压控振荡器和包含偏移值的非易失性存储器。 非易失性存储器提供偏移值（表示偏移电压值），其确保压控振荡器接收使得系统时钟的频率在特定公差范围内的电压值。 该装置还可以包括写入控制单元，用于确定和更新下一个定时恢复获取周期的偏移值。 这些方法包括执行这些操作的步骤。

    Lighting system with a device for reducing system wattage
    98.
    发明授权
    Lighting system with a device for reducing system wattage 失效
    具有降低系统瓦数的设备的照明系统

    公开(公告)号：US5606222A

    公开(公告)日：1997-02-25

    申请号：US366137

    申请日：1994-12-29

    申请人： Eduardus J. Cottaar ,  Dirk Van Pijkeren

    发明人： Eduardus J. Cottaar ,  Dirk Van Pijkeren

    IPC分类号： H05B41/16 ,  H05B41/231 ,  H01J7/44

    CPC分类号： H05B41/231

    摘要： A lighting system having a gas discharge lamp and a stabilization ballast further includes a low loss device to reduce the current through the ballast and lamp, thereby reducing system wattage for energy savings. For a lead-type ballast, the current reducing device is a capacitive device in parallel with the discharge lamp. For a lag-type ballast, the device is an inductive device in parallel with the lamp. The device may be in a housing connected between the lamp ballast and the lamp, or may be included within the outer envelope of the discharge lamp. This enables an existing system to be easily retrofit without disturbing the existing ballast.

    摘要翻译： 具有气体放电灯和稳定镇流器的照明系统还包括低损耗装置，以减少通过镇流器和灯的电流，从而降低系统功率以实现节能。 对于铅酸式镇流器，电流减小装置是与放电灯并联的电容性装置。 对于滞后型镇流器，该装置是与灯并联的感应装置。 该装置可以连接在灯镇流器和灯之间的壳体中，或者可以包括在放电灯的外封套内。 这使得现有系统可以轻松地改装而不会干扰现有的镇流器。

    Electronic ballast having a triac dimming filter with preconditioner offset control
    99.
    发明授权
    Electronic ballast having a triac dimming filter with preconditioner offset control 失效
    电子镇流器具有预调节偏移控制的三端双向可控硅调光滤波器

    公开(公告)号：US5604411A

    公开(公告)日：1997-02-18

    申请号：US422198

    申请日：1995-03-31

    申请人： Sreeraman Venkitasubrahmanian ,  Gert W. Bruning ,  Paul Veldman ,  Thomas Farkas ,  Raj Jayaraman ,  Yongping Xia

    发明人： Sreeraman Venkitasubrahmanian ,  Gert W. Bruning ,  Paul Veldman ,  Thomas Farkas ,  Raj Jayaraman ,  Yongping Xia

    IPC分类号： H05B41/28 ,  H05B41/392 ,  G05F1/00

    CPC分类号： H05B41/3924 ,  H05B41/28 ,  Y10S315/04

    摘要： A dimming ballast for use with a phase control dimmer, and particularly a triac dimmer, includes an EMI filter selected with a high impedance to avoid excessive voltage and peak currents in the filter due to resonance with the phase controlled AC waveform at low conduction angles, when the load presented by the lamp is low. The EMI filter includes a filter capacitor connected at the output of a rectifier. The ballast also includes circuitry to sense the rectified DC voltage and to discharge the filter capacitor when the rectified voltage is at or near zero, to thereby keep the EMI filter loaded and prevent misfiring of the triac dimmer. In a favorable embodiment, the sensing and discharge function is carried out by a pre-conditioner of the switched-mode type.

    摘要翻译： 与相位控制调光器特别是三端双向可控硅调光器一起使用的调光镇流器包括由高阻抗选择的EMI滤波器，以避免由于在低导通角下与相位受控AC波形的谐振而导致滤波器中过大的电压和峰值电流， 当灯呈现的负载较低时。 EMI滤波器包括连接在整流器输出端的滤波电容器。 镇流器还包括用于感测整流的直流电压并在整流电压处于或接近零时对滤波电容器进行放电的电路，从而保持EMI滤波器的负载并防止三端双向可控硅调光器的失火。 在有利的实施例中，感测和放电功能由切换模式类型的预调节器来执行。