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    • 2. 发明授权
    • Piezoelectric actuator, inkjet head assembly and method of manufacturing the same
    • 压电致动器,喷墨头组件及其制造方法
    • US08777378B2
    • 2014-07-15
    • US13407331
    • 2012-02-28
    • Tae Kyung LeePil Joong KangHwa Sun Lee
    • Tae Kyung LeePil Joong KangHwa Sun Lee
    • B41J2/045
    • B41J2/14233B41J2002/14491B41J2202/18
    • There are provided a piezoelectric actuator, an inkjet head assembly, and a method of manufacturing the same. The piezoelectric actuator includes: upper and lower electrodes providing driving voltage; and a piezoelectric substance formed between the upper and lower electrodes through solidifying a liquid piezoelectric substance, and providing driving force to ink in each of a plurality of pressure chambers provided in an inkjet head, wherein the piezoelectric substance includes a plurality of branch portions individually provided on an upper portion of each of the plurality of pressure chambers and a large area portion integrally provided while being connected to each of the plurality of branch portions at one ends of the plurality of branch portions.
    • 提供了压电致动器,喷墨头组件及其制造方法。 压电致动器包括:提供驱动电压的上下电极; 以及通过使液体压电体固化而形成在上下电极之间的压电体,并且在设置在喷墨头中的多个压力室中的每个压力室中的墨水中提供驱动力,其中,压电体包括多个分支部, 在所述多个压力室的每一个的上部,以及在所述多个分支部的一端连接到所述多个分支部中的每一个的同时一体地设置的大面积部分。
    • 6. 发明申请
    • TRANSCEIVERS HAVING LOOPBACK SWITCHES AND METHODS OF CALIBRATING CARRIER LEAKAGE THEREOF
    • 具有回路开关的收发器和校准载波泄漏的方法
    • US20120257656A1
    • 2012-10-11
    • US13439114
    • 2012-04-04
    • Byoung-Joong KangSung-Gi YangJoung-Hyun Yim
    • Byoung-Joong KangSung-Gi YangJoung-Hyun Yim
    • H04B1/38
    • H04B1/525
    • A transceiver includes a transmitter circuit, a receiver circuit, and the loopback switch. The transmitter circuit performs a digital-to-analog conversion (DAC) operation on a calibration code without a transmission digital signal in a calibration mode to generate a calibration signal. The transmitter circuit up-converts the calibration signal and generates a transmission signal. The receiver circuit down-converts the transmission signal in the calibration mode and generates a receiving digital signal. The loopback switch electrically connects an output terminal of the transmitter circuit and an input terminal of the receiver circuit in the calibration mode. Thus, the transceiver may stably reduce a carrier leakage irrespective of processes, voltages, and temperatures.
    • 收发器包括发射机电路,接收机电路和环回开关。 发射机电路在校准模式下对校准代码进行数模转换(DAC)操作,而无需传输数字信号,以产生校准信号。 发射机电路对校准信号进行上变频,并产生一个传输信号。 接收机电路在校准模式下对发送信号进行下变频,并生成接收数字信号。 回路开关在校准模式下,将发送器电路的输出端子和接收器电路的输入端子电连接。 因此,无论工艺,电压和温度如何,收发器可以稳定地减少载波泄漏。
    • 8. 发明授权
    • Low noise amplifier
    • 低噪声放大器
    • US07663441B2
    • 2010-02-16
    • US12033044
    • 2008-02-19
    • Byoung-Joong Kang
    • Byoung-Joong Kang
    • H03G3/10
    • H03F1/3205H03F1/26H03F1/301H03F3/19H03F2200/18H03F2200/294H03F2200/366H03F2200/372H03F2200/451H03F2200/492H04B1/123
    • A low noise amplifier includes a main amplifier configured to amplify a first input signal to generate a first output signal and an auxiliary amplifier configured to amplify a second input signal to generate a second output signal. The auxiliary amplifier is coupled to the main amplifier for superposing the second output signal and the first output signal. The low noise amplifier also includes an adjusting unit configured to adjust a time constant for reducing a third order intermodulation distortion of the superposed signal in response to a control signal. The adjusting unit is configured to generate the second input signal based on the time constant and the first input signal.
    • 低噪声放大器包括:主放大器,被配置为放大第一输入信号以产生第一输出信号;以及辅助放大器,被配置为放大第二输入信号以产生第二输出信号。 辅助放大器耦合到主放大器,用于叠加第二输出信号和第一输出信号。 低噪声放大器还包括调整单元,其被配置为响应于控制信号调整时间常数,以减少叠加信号的三阶互调失真。 调整单元被配置为基于时间常数和第一输入信号产生第二输入信号。
    • 10. 发明申请
    • Thrust termination device for solid rocket motor
    • 固体火箭发动机推力终端装置
    • US20070113537A1
    • 2007-05-24
    • US11590925
    • 2006-11-01
    • Hong-Been ChangMoon-Joong Kang
    • Hong-Been ChangMoon-Joong Kang
    • F02K9/08
    • F02K9/08F02K9/34F02K9/92
    • Disclosed is a thrust termination device for a solid rocket motor, which terminates the net thrust by the reverse thrust of the rocket motor produced from the emission of the combustion gas in the reverse direction, when the stage separation signal is transferred at the normal thrust state of the rocket motor. An object of the present invention is to provide a thrust termination device for a rocket motor, which can contrive to accomplish the structural safety and mechanical sealing performance at the combustion chamber condition of the high temperature and high pressure, and easily remove the thrust termination device even at the low pressure state and open the trust termination ports successively with very small impacts when the thrust termination is commanded.
    • 公开了一种用于固体火箭发动机的推力终止装置,其在台阶分离信号以正常推力状态传递时,通过由相对方向的燃烧气体的排放产生的火箭发动机的反向推力而终止净推力 的火箭发动机。 本发明的目的是提供一种用于火箭发动机的推力终止装置,其可以在高温高压的燃烧室条件下实现结构安全性和机械密封性能,并且容易地去除推力终端装置 即使在低压状态下,也可以在推力终止命令时以相当小的冲击开启信任终端口。