Integrated tunable high efficiency power amplifier
    3.
    发明授权
    Integrated tunable high efficiency power amplifier 有权
    集成可调高效率功率放大器

    公开(公告)号:US06232841B1

    公开(公告)日:2001-05-15

    申请号:US09346097

    申请日:1999-07-01

    IPC分类号: H03F304

    CPC分类号: H03F3/2176 H01H59/0009

    摘要: Power amplifiers having reactive networks (such as classes C, C-E, E and F) employ tunable reactive devices in their reactive networks, with the reactive devices respective reactance values capable of being adjusted by means of respective control signals. The tunable reactive devices are made from micro-electromechanical (MEM) devices capable of being integrated with the control circuitry needed to produce the control signals and other amplifier components on a common substrate. The reactive components have high Q values across their adjustment range, enabling the amplifier to produce an output with a low harmonic content over a wide range of input signal frequencies, and a frequency agile, high quality output. The invention can be realized on a number of foundry technologies.

    摘要翻译: 具有无功网络(例如类C,C-E,E和F)的功率放大器在其无功网络中采用可调谐无功装置,其中无功装置可以通过相应的控制信号来调整各自的电抗值。 可调谐无功装置由能够与在公共基板上产生控制信号和其它放大器部件所需的控制电路集成的微机电(MEM)器件制成。 无功分量在其调节范围内具有高Q值,使得放大器能够在宽范围的输入信号频率以及频率灵敏,高质量输出下产生具有低谐波含量的输出。 本发明可以通过多种铸造技术实现。

    Integrated variable gain power amplifier and method
    4.
    发明授权
    Integrated variable gain power amplifier and method 失效
    集成可变增益功率放大器及方法

    公开(公告)号:US5834975A

    公开(公告)日:1998-11-10

    申请号:US815694

    申请日:1997-03-12

    IPC分类号: H03G1/00 H03G3/30 H03F3/68

    摘要: An integrated, variable gain microwave frequency power amplifier comprises a number of individual amplifier stages which contain microwave frequency active devices. Each stage is fed with a common input signal, and the individual stage outputs are connected to respective micro-electromechanical (MEM) switches which, when closed, connect the individual outputs together to form the power amplifier's output. The power amplifier's gain is determined by the number of outputs connected together. The preferred switch provides low insertion loss and excellent electrical isolation, enabling a number of amplifier stages to be efficiently interconnected to provide a wide dynamic range power amplifier. The switches are preferably integrated on a common substrate with the active devices, eliminating the need for wire bonds and reducing parasitic capacitances. A variable impedance network comprising a number of impedance matching networks selected using MEM switches can be connected to and integrated with a variable gain power amplifier to provide impedance matching that is appropriate for each of the power amplifier's possible output power levels.

    摘要翻译: 集成的可变增益微波频率功率放大器包括多个单独的放大器级,其包含微波频率有源器件。 每个级馈入一个公共输入信号,并且各个级输出连接到相应的微机电(MEM)开关,当关闭时,各个输出端连接在一起形成功率放大器的输出。 功率放大器的增益取决于连接在一起的输出数量。 优选的开关提供低插入损耗和优异的电隔离,使得能够高效地互连多个放大器级,以提供宽动态范围功率放大器。 这些开关优选地与有源器件集成在公共衬底上,消除了对引线键合的需要并降低寄生电容。 包括使用MEM开关选择的多个阻抗匹配网络的可变阻抗网络可以连接到可变增益功率放大器并与可变增益功率放大器集成,以提供适合于每个功率放大器的可能输出功率电平的阻抗匹配。

    Monolithically integrated switched capacitor bank using micro electro
mechanical system (MEMS) technology
    7.
    发明授权
    Monolithically integrated switched capacitor bank using micro electro mechanical system (MEMS) technology 失效
    使用微机电系统(MEMS)技术的单片集成开关电容器组

    公开(公告)号:US5880921A

    公开(公告)日:1999-03-09

    申请号:US848116

    申请日:1997-04-28

    IPC分类号: H01H59/00 H03B1/00 H01G23/00

    摘要: A monolithically integrated switched capacitor bank using MEMS technology that is capable of handling GHz signal frequencies in both the RF and millimeter bands while maintaining precise digital selection of capacitor levels over a wide tuning range. Each MEMS switch includes a cantilever arm that is affixed to the substrate and extends over a ground line and a gapped signal line. An electrical contact is formed on the bottom of the cantilever arm positioned above and facing the gap in the signal line. A top electrode atop the cantilever arm forms a control capacitor structure above the ground line. A capacitor structure, preferably a MEMS capacitor suspended above the substrate at approximately the same height as the cantilever arm, is anchored to the substrate and connected in series with a MEMS switch. The MEMS switch is actuated by applying a voltage to the top electrode, which produces an electrostatic force that attracts the control capacitor structure toward the ground line, thereby causing the electrical contact to close the gap in the signal line and connect the MEMS capacitor structure between a pair of output terminals. The integrated MEMS switch-capacitor pairs have a large range between their on-state and off-state impedance, and thus exhibit superior isolation and insertion loss characteristics.

    摘要翻译: 使用MEMS技术的单片集成开关电容器组,其能够处理RF和毫米波段中的GHz信号频率,同时在宽调谐范围内保持电容器电平的精确数字选择。 每个MEMS开关包括悬臂,其固定在基板上并在接地线和间隙信号线上延伸。 在位于信号线上方并面向信号线的间隙的悬臂的底部上形成电接触。 在悬臂上方的顶部电极在地线上方形成控制电容器结构。 电容器结构,优选地悬置在基板上方的悬臂上方与悬臂大致相同高度的MEMS电容器被锚定到基板并与MEMS开关串联连接。 通过向顶部电极施加电压来致动MEMS开关,该电压产生吸引控制电容器结构朝向接地线的静电力,从而使电接触闭合信号线中的间隙,并将MEMS电容器结构 一对输出端子。 集成的MEMS开关电容器对在其导通状态和截止状态阻抗之间具有较大的范围,因此表现出优异的隔离和插入损耗特性。

    Thermostatic device for automatic choke control
    9.
    发明授权
    Thermostatic device for automatic choke control 失效
    自动扼流器控制恒温装置

    公开(公告)号:US4068636A

    公开(公告)日:1978-01-17

    申请号:US626928

    申请日:1975-10-29

    IPC分类号: F01M13/00 F02B1/04 F02M1/10

    CPC分类号: F02M1/10 F02B1/04

    摘要: End portions of the choke valve shaft project outside the carburetor mixing passage duct. One end portion is connected with an actuator mechanism that is responsive to either engine speed or manifold pressure. The other projects into a cylindrical chamber on the carburetor body that houses a spirally coiled bimetal strip having its inner end connected with the shaft, its outer end engageable with circumferentially spaced abutments. The chamber is communicated with the crankcase breather and also with the mixing duct through a flapper valve, so that the bimetal is subjected to the temperature of vented crankcase vapors.

    摘要翻译: 阻塞阀轴的端部突出在化油器混合通道管道外部。 一个端部与响应于发动机转速或歧管压力的致动器机构连接。 另一个投入到化油器主体上的圆柱形腔室中,其容纳螺旋卷绕的双金属带,其内端与轴连接,其外端可与周向间隔开的邻接部配合。 该室与曲轴箱通气器连通,并且还通过挡板阀与混合管道连通,使得双金属板经受排气曲轴箱蒸气的温度。

    Hermetic chip scale packaging means and method including self test
    10.
    发明授权
    Hermetic chip scale packaging means and method including self test 有权
    密封芯片级封装手段和方法包括自检

    公开(公告)号:US06638784B2

    公开(公告)日:2003-10-28

    申请号:US09339127

    申请日:1999-06-24

    IPC分类号: H01L2100

    CPC分类号: B81B7/0077

    摘要: An integrated circuit chip and method of manufacturing the same which includes the use of a wafer cap having depressions therein for aligning with micro-electro-mechanical systems included in said integrated circuit when said cap is placed over a wafer containing numerous integrated circuits, the wafer is then cut, after the wafer cap is bound to the wafer. The wafer cap may also include a piezo-resistive element thereon for measuring pressure around the hermetically sealed MEMS.

    摘要翻译: 一种集成电路芯片及其制造方法,其包括当所述盖子放置在包含许多集成电路的晶片上时,使用其中具有凹部的晶片盖,用于与包括在所述集成电路中的微电子机械系统对准,所述晶片 然后在晶片盖与晶片结合之后切割。 晶片盖还可以包括用于测量围绕密封的MEMS的压力的压电元件。