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27 条记录 (耗时 0.012 秒)

    System and method for filtering harmonics of a power amplifier
    1.
    发明公开
    System and method for filtering harmonics of a power amplifier 审中-公开
    系统和Verfahren zur Filterung von Harmonischen einesLeistungsverstärkers

    公开(公告)号：EP1950883A1

    公开(公告)日：2008-07-30

    申请号：EP07101211.6

    申请日：2007-01-25

    申请人： Research In Motion Limited

    发明人： Zhu, Lizhong ,  Mankaruse, George ,  Corrigan, Michael ,  Xu, Jun ,  Nickerson, Kent

    IPC分类号： H03F1/56 ,  H03F3/191

    CPC分类号： H03F1/32 ,  H03F1/56 ,  H03F3/189 ,  H03F3/191 ,  H03F3/245 ,  H03F2200/171 ,  H03F2200/321 ,  H03F2200/391 ,  H03F2200/451 ,  H03H7/0115 ,  H03H7/06 ,  H03H7/1775 ,  H03H7/1783 ,  H03H7/30 ,  H04B1/0475 ,  H05K1/0231 ,  H05K1/0233 ,  H05K1/0248 ,  H05K1/181 ,  H05K2201/086 ,  H05K2201/10166

    摘要： The invention relates to a system and method for attenuating harmonics in output signals. In the system, an electronic circuit for reducing harmonics of an output signal from a power amplifier in a transmission circuit for a wireless communication device is provided. The circuit comprises: a printed circuit board (PCB); a power amplifier for generating an output signal; and a circuit implemented on the PCB connected to an output terminal of the power amplifier for the output signal. The circuit comprises a first filtering stage; a delay element; and a harmonic filter. The delay element is located between the harmonic filter and the output terminal and the delay element provides a timing delay in the output signal through at least one 0 ohm-rated component. Also, the harmonic filter is a low pass filter having a frequency cut-off point that attenuates first order harmonics of the output signal.

    摘要翻译： 本发明涉及用于衰减输出信号中的谐波的系统和方法。 在该系统中，提供了一种用于在无线通信装置的发送电路中降低来自功率放大器的输出信号的谐波的电子电路。 该电路包括：印刷电路板（PCB）; 用于产生输出信号的功率放大器; 以及在PCB上实现的电路，连接到功率放大器的输出端用于输出信号。 电路包括第一滤波级; 延迟元件 和谐波滤波器。 延迟元件位于谐波滤波器和输出端子之间，延迟元件通过至少一个0欧姆额定分量在输出信号中提供定时延迟。 此外，谐波滤波器是具有衰减输出信号的一阶谐波的频率截止点的低通滤波器。

    Mobile wireless communications device having improved RF immunity of audio transducers to electromagnetic interference (EMI)
    3.
    发明公开
    Mobile wireless communications device having improved RF immunity of audio transducers to electromagnetic interference (EMI) 有权
    在对电磁干扰的音频转换器改进的射频干扰免疫的移动无线通信终端。

    公开(公告)号：EP1710922A1

    公开(公告)日：2006-10-11

    申请号：EP05252109.3

    申请日：2005-04-04

    申请人： Research In Motion Limited

    发明人： Zhu, Lizhong ,  Mankaruse, George ,  Corrigan, Michael

    IPC分类号： H04B1/38 ,  H04B15/00 ,  H05K9/00 ,  H05K1/00

    CPC分类号： H04B1/3833 ,  H04B15/00

    摘要： A mobile wireless communications device includes a housing and circuit board carried by the housing and having radio frequency (RF) circuitry and a processor operative with each other. Audio circuitry is carried by the circuit board and an audio transducer assembly, such as a speaker, has electrical contacts that electrically engage the audio circuitry for carrying audio signals between the audio circuitry and audio transducer assembly. A filter is mounted at the audio transducer assembly and reduces radio frequency (RF) electromagnetic interference to the audio transducer assembly during device operation.

    摘要翻译： 一种移动无线通信设备包括外壳和电路板由外壳和具有射频（RF）电路和海誓山盟处理器，操作携带。 音频电路由电路板和音频换能器组件携带，检查扬声器，具有电接触并电接合的音频电路，用于音频电路和音频换能器组件之间携带音频信号。 的过滤器被安装在音频换能器组装和降低射频（RF）器件工作期间的电磁干扰到音频换能器组件。

    Mobile wireless communications device with reduced harmonics resulting from metal shield coupling
    5.
    发明公开
    Mobile wireless communications device with reduced harmonics resulting from metal shield coupling 有权
    移动电话公共交通工具维也纳电气公司Schwingungen infolge von Metallschirmkopplung

    公开(公告)号：EP2117125A1

    公开(公告)日：2009-11-11

    申请号：EP08155894.2

    申请日：2008-05-08

    申请人： Research In Motion Limited

    发明人： Zhu, Lizhong ,  Mankaruse, George ,  Corrigan, Michael

    IPC分类号： H04B1/38 ,  H03H7/06

    CPC分类号： H04B1/3833 ,  H03H7/06

    摘要： A mobile wireless communications device includes a housing and antenna supported by the housing. At least one circuit board is carried by the housing and has radio frequency (RF) circuitry operative with the antenna for receiving and transmitting RF signals through the antenna. A power amplifier is connected within a transmission line for amplifying RF signals to be transmitted over the transmission line to the antenna. An antenna switch is carried by the circuit board and connected to the antenna and RF circuitry. An RF shield surrounds the power amplifier and antenna switch isolates the power amplifier and antenna switch from the antenna and RF circuitry. A low pass filter has an input connected to the power amplifier and an output connected to the antenna switch for reducing any RF coupling of voltage standing waves of upper harmonic frequencies from the power amplifier into the antenna switch between the input and output of the low pass filter through the RF shield while maintaining transmission of signals through the transmission line at a desired fundamental frequency.

    摘要翻译： 移动无线通信设备包括由壳体支撑的壳体和天线。 至少一个电路板由外壳承载，并且具有与天线操作的射频（RF）电路，用于通过天线接收和发送RF信号。 功率放大器连接在传输线内，用于放大要通过传输线传输到天线的RF信号。 天线开关由电路板承载并连接到天线和RF电路。 RF屏蔽围绕功率放大器和天线开关将功率放大器和天线开关与天线和RF电路隔离开来。 低通滤波器具有连接到功率放大器的输入和连接到天线开关的输出，用于减少来自功率放大器的高次谐波频率的电压驻波与低通的输入和输出之间的天线切换中的任何RF耦合 通过RF屏蔽滤波，同时保持信号以期望的基频通过传输线的传输。

    Wireless headset for a mobile phone
    7.
    发明公开
    Wireless headset for a mobile phone 有权
    无绳耳机手机

    公开(公告)号：EP1801986A1

    公开(公告)日：2007-06-27

    申请号：EP05257371.4

    申请日：2005-11-30

    申请人： Research In Motion Limited

    发明人： Zhu, Lizhong ,  Mankaruse, George ,  Corrigan, Michael

    IPC分类号： H04B1/38

    CPC分类号： H04M1/6066 ,  H04B1/385 ,  H04B2001/3866

    摘要： A wireless headset has improved immunity to RF electromagnetic interference produced from wireless communications devices. A headset body is adapted to be worn by a user and includes a microphone and earpiece. An antenna receives wireless communication signals and passes them to RF and audio circuitry mounted within the headset body. The RF and audio circuitry include a Bluetooth module operatively connected to the antenna for transmitting and receiving wireless communication signals, an audio CODEC connected to the Bluetooth module, and audio connection lines connected between the CODEC and the earpiece and between the CODEC and the microphone. A filter is connected into each of the audio connection lines at the earpiece and microphone and operative for reducing the RF coupling from a mobile wireless communications device.

    Mobile wireless communication device with separate in-phase and quadrature power amplification
    9.
    发明公开
    Mobile wireless communication device with separate in-phase and quadrature power amplification 有权
    移动式广告投放系统

    公开(公告)号：EP2146438A1

    公开(公告)日：2010-01-20

    申请号：EP08160458.9

    申请日：2008-07-15

    申请人： Research In Motion Limited

    发明人： Mankaruse, George ,  Zhu, Lizhong ,  Corrigan, Michael ,  Jarmuszewski, Perry

    IPC分类号： H04B1/04 ,  H04B15/04

    CPC分类号： H04B1/0458 ,  H03F1/02 ,  H03F3/24 ,  H04B15/04 ,  H04B2001/045

    摘要： A mobile wireless communications device includes a housing an antenna, and radio frequency (RF) circuitry. A transceiver is connected to the antenna and a processor is operative with the RF circuitry. The transceiver includes an In-phase and Quadrature (I/Q) Modulation and Power Amplification circuit having an In-phase (I) circuit with a modulator mixer and power amplifier circuit. A Quadrature (Q) circuit includes a modulator mixer and power amplifier circuit. A power combiner receives the separately amplified In-phase and Quadrature signals and sums and outputs the signals as a combined I and Q signal. The I and Q circuits are isolated from the combined I and Q signal to enhance antenna matching and transmitted radiated power (TRP) and reduce harmonic emission from the power amplification circuits.

    摘要翻译： 移动无线通信设备包括外壳天线和射频（RF）电路。 收发器连接到天线，处理器与RF电路一起工作。 收发器包括具有调制器混频器和功率放大器电路的同相（I）电路的同相和正交（I / Q）调制和功率放大电路。 正交（Q）电路包括调制器混频器和功率放大器电路。 功率组合器接收单独放大的同相和正交信号，并将信号相加和输出，作为组合的I和Q信号。 I和Q电路与组合的I和Q信号隔离，以增强天线匹配和发射辐射功率（TRP），并减少功率放大电路的谐波发射。