Pen Voltage Regulator For Inkjet Printers
    23.
    发明申请
    Pen Voltage Regulator For Inkjet Printers 有权
    笔式电压调节器用于喷墨打印机

    公开(公告)号:US20070216715A1

    公开(公告)日:2007-09-20

    申请号:US11277032

    申请日:2006-03-20

    CPC classification number: B41J29/393 B41J2/04541 B41J2/04548

    Abstract: A pen voltage regulator is provided for supplying a regulated pen voltage to one or more printheads of an inkjet printer. The pen voltage regulator includes: a regulator switch arranged between an input terminal and an output terminal; a linear lifting circuit connected to the regulator switch; a soft start circuit arranged between the regulator switch and the output terminal; an output filter arranged between the soft start circuit and the output terminal; and a pulse width modulation (PWM) controller connected to the linear filtering circuit. The PWM controller is arranged to provide a pulse width modulated control signal to the linear filtering circuit. The linear filtering circuit is configured to transmit a smoothed control signal to the regulator switch and to ensure that the regulator switch is operable in a linear region. The soft start circuit is configured to provide a soft-start mode of operation so as to prevent the generation of large inrush currents and to provide overload protection.

    Abstract translation: 提供笔电压调节器,用于向喷墨打印机的一个或多个打印头提供经调节的笔电压。 笔稳压器包括:调节器开关,布置在输入端子和输出端子之间; 连接到调节器开关的线性滤波电路; 软启动电路,布置在调节器开关和输出端之间; 布置在软起动电路和输出端子之间的输出滤波器; 以及连接到线性滤波电路的脉宽调制(PWM)控制器。 PWM控制器被布置成向线性滤波电路提供脉宽调制控制信号。 线性滤波电路被配置为将平滑的控制信号发送到调节器开关并且确保调节器开关在线性区域中可操作。 软启动电路被配置为提供软启动操作模式,以防止产生大的浪涌电流并提供过载保护。

    Methods for Agrobacterium-mediated transformation
    24.
    发明授权
    Methods for Agrobacterium-mediated transformation 失效
    农杆菌介导转化方法

    公开(公告)号:US06822144B1

    公开(公告)日:2004-11-23

    申请号:US08963096

    申请日:1997-11-03

    CPC classification number: C12N15/8205

    Abstract: The present invention relates to methods for improving the transformation frequency of Agrobacterium-mediated transformation of maize embryos. A preferred method for transforming maize using Agrobacterium comprises the steps of: contacting at least one immature embryo from a maize plant with Agrobacterium capable of transferring at least one gene to said embryo; co-cultivating the embryos with Agrobacterium; culturing the embryos in medium comprising N6 salts, an antibiotic capable of inhibiting the growth of Agrobacterium, and a selective agent to select for embryos expressing the gene; and regenerating plants expressing the gene.

    Abstract translation: 本发明涉及改善农杆菌介导的玉米胚转化的转化频率的方法。 使用农杆菌转化玉米的优选方法包括以下步骤:使来自玉米植物的至少一种未成熟胚与能够将至少一种基因转移至所述胚的农杆菌接触; 与土壤杆菌共培养胚胎; 在包含N6盐的培养基中培养胚胎,能够抑制农杆菌生长的抗生素,以及选择表达基因的胚胎的选择剂; 和再生表达该基因的植物。

    THERMAL STRUCTURE COUPLING ANAYSIS METHOD OF A SOLID ROCKET MOTOR NOZZLE CONSIDERING THE STRCTURAL GAPS

    公开(公告)号:US20230046715A1

    公开(公告)日:2023-02-16

    申请号:US17400084

    申请日:2021-08-11

    Abstract: The invention provides a thermal structure coupling analysis method of a solid rocket motor nozzle considering the structural gaps, comprising S1: establish a model of flow field in nozzle and ascertain the cross-sectional area at different positions along the axis, perform quasi-one-dimensional isentropic flow analysis of the nozzle flow field by Newton iteration method; S2: use Bartz formula to ascertain the boundary of the nozzle convective heat transfer coefficient; S3: establish a numerical analysis project of nozzle thermal structure; a two-dimensional axisymmetric model of the nozzle thermal protection structure and a material model thereof; S4: proceed a numerical analysis of the nozzle thermal protection structure heat transfer, including model setting, material setting, contact setting, meshing, solution parameter setting, boundary condition setting, solution and result post-processing; S5: proceed a numerical analysis of the nozzle thermal protection structure thermal stress, including solution parameter setting, boundary condition setting, solution and result post-processing.

    Diversity Combining of Non-Coherently Modulated LDPC Codes in Wireless Communications

    公开(公告)号:US20170201347A1

    公开(公告)日:2017-07-13

    申请号:US14950191

    申请日:2015-11-24

    CPC classification number: H04L1/0054 H04B7/08 H04B7/0885 H04L1/0045 H04L1/0057

    Abstract: A method of decoding a plurality of diverse signals for low-density parity-check (LDPC) decoders that takes advantage of signal diversity. The method allows for the combining of soft-decision LDPC encoded non-coherently modulated signals, which is in contrast to existing approaches where hard decision combining is used for non-coherently modulated signals. The method includes the steps of inputting each diversity signal into a unique demodulator, and calculating the LLR of each demodulated signal. When the diverse demodulated signals are combined into a single combined signal, each bit of the combined signal is selected according to the value of either the highest LLR value of each bit across the demodulated signals or according to the sum of the LLR of each bit across the demodulated signals.

    Amplifier with variable matching circuit to improve linearity
    29.
    发明授权
    Amplifier with variable matching circuit to improve linearity 有权
    具有可变匹配电路的放大器,以提高线性度

    公开(公告)号:US08779857B2

    公开(公告)日:2014-07-15

    申请号:US12699659

    申请日:2010-02-03

    CPC classification number: H03F1/565 H03F1/086 H03F3/193

    Abstract: Techniques for reducing distortion and improving linearity of amplifiers are described. In an exemplary design, an apparatus includes a driver amplifier, a variable matching circuit, and a power amplifier. The driver amplifier amplifies a first RF signal and provides a second RF signal. The variable matching circuit receives the second RF signal and provides a third RF signal. The power amplifier amplifies the third RF signal and provides a fourth RF signal. The variable matching circuit matches a fixed impedance at the output of the driver amplifier to a variable impedance at the input of the power amplifier in order to improve the linearity of the amplifiers. In an exemplary design, the power amplifier includes a first transistor (e.g., an NMOS transistor) of a first type, and the variable matching circuit includes a second transistor (e.g., a PMOS transistor) of a second type that is different from the first type.

    Abstract translation: 描述了减小失真和提高放大器线性度的技术。 在示例性设计中,装置包括驱动器放大器,可变匹配电路和功率放大器。 驱动器放大器放大第一RF信号并提供第二RF信号。 可变匹配电路接收第二RF信号并提供第三RF信号。 功率放大器放大第三RF信号并提供第四RF信号。 可变匹配电路将驱动放大器输出端的固定阻抗与功率放大器输入端的可变阻抗相匹配,以提高放大器的线性度。 在示例性设计中,功率放大器包括第一类型的第一晶体管(例如,NMOS晶体管),并且可变匹配电路包括与第一类型不同的第二类型的第二晶体管(例如,PMOS晶体管) 类型。

    Power amplifier with switched output matching for multi-mode operation
    30.
    发明授权
    Power amplifier with switched output matching for multi-mode operation 有权
    功率放大器,具有开关输出匹配多模式操作

    公开(公告)号:US08750810B2

    公开(公告)日:2014-06-10

    申请号:US12623248

    申请日:2009-11-20

    CPC classification number: H04B1/0458 H03F1/56 H03F3/245 H04B1/406

    Abstract: Exemplary embodiments are directed to a transmitter with a power amplifier and a switched output matching circuit implementing a plurality of output paths for a plurality of operating modes is described. The power amplifier receives an input RF signal and provides an amplified RF signal. An output matching network performs impedance transformation from low impedance at the power amplifier output to higher impedance at the matching network output. The plurality of output paths are coupled to the output matching network. Each output path provides a different target output impedance for the power amplifier and routes the amplified RF signal from the power amplifier to an antenna when that output path is selected. Each output path may include a matching network coupled in series with a switch. The matching network provides the target output impedance for the power amplifier when the output path is selected. The switch couples or decouples the output path to/from the power amplifier.

    Abstract translation: 示例性实施例涉及具有功率放大器和实现用于多个操作模式的多个输出路径的切换输出匹配电路的发射机。 功率放大器接收输入RF信号并提供放大的RF信号。 输出匹配网络执行从功率放大器输出端的低阻抗到匹配网络输出端的较高阻抗的阻抗变换。 多个输出路径耦合到输出匹配网络。 当选择该输出路径时,每个输出路径为功率放大器提供不同的目标输出阻抗,并将放大的RF信号从功率放大器路由到天线。 每个输出路径可以包括与开关串联耦合的匹配网络。 当选择输出路径时,匹配网络为功率放大器提供目标输出阻抗。 开关将输出路径耦合到/从功率放大器解耦。

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