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26 条记录 (耗时 0.014 秒)

    RF-DAC CELL AND METHOD FOR PROVIDING AN RF OUTPUT SIGNAL
    1.
    发明申请
    RF-DAC CELL AND METHOD FOR PROVIDING AN RF OUTPUT SIGNAL 有权
    RF-DAC单元和提供RF输出信号的方法

    公开(公告)号：US20140159933A1

    公开(公告)日：2014-06-12

    申请号：US13711958

    申请日：2012-12-12

    申请人： Krzysztof Dufrene ,  Harald Pretl ,  Patrick Ossmann

    发明人： Krzysztof Dufrene ,  Harald Pretl ,  Patrick Ossmann

    IPC分类号： H03M1/66

    CPC分类号： H03M1/66 ,  H03M1/0612

    摘要： An RF-DAC cell is configured to generate an RF output signal based on a baseband signal, a first signal and a second signal. The first signal has a first duty cycle and toggles between first predefined amplitude values, and the second signal has a second duty cycle smaller than the first duty cycle and toggles between second predefined amplitude values.

    摘要翻译： RF-DAC单元被配置为基于基带信号，第一信号和第二信号产生RF输出信号。 第一信号具有第一占空比并且在第一预定幅度值之间切换，并且第二信号具有小于第一占空比的第二占空比，并且在第二预定幅度值之间切换。

    Receiver arrangement with AC coupling
    3.
    发明授权
    Receiver arrangement with AC coupling 有权
    接收器配置与交流耦合

    公开(公告)号：US07929936B2

    公开(公告)日：2011-04-19

    申请号：US10481535

    申请日：2002-06-21

    申请人： Bernd Adler ,  Dieter Pimingsdorfer ,  Harald Pretl ,  Werner Schelmbauer

    发明人： Bernd Adler ,  Dieter Pimingsdorfer ,  Harald Pretl ,  Werner Schelmbauer

    IPC分类号： H04B1/10

    CPC分类号： H03D3/008 ,  H04B1/30

    摘要： A receiver arrangement with AC coupling is specified in which a filter arrangement (3) is provided in a baseband signal processing chain in a homodyne receiver and can be switched between at least two high-pass filter cut-off frequencies. In this case, a brief changeover is made to a higher cut-off frequency when varying the gain of a low-noise baseband amplifier (2), for example when the received field strength changes, during the reception mode. The described arrangement allows changes to be carried out to the gain in baseband during the normal reception mode. The present receiver is accordingly suitable for code division multiple access methods, such as those which are provided in the UMTS Standard.

    摘要翻译： 规定了具有AC耦合的接收器装置，其中滤波器装置（3）设置在零差接收器中的基带信号处理链中，并且可以在至少两个高通滤波器截止频率之间切换。 在这种情况下，例如当在接收模式期间接收到的场强变化时，改变低噪声基带放大器（2）的增益时，对较高的截止频率进行简单的切换。 所描述的布置允许在正常接收模式期间对基带中的增益进行改变。 因此，本接收机适合于诸如在UMTS标准中提供的那些的码分多址方法。

    Frequency tuning circuit, use of the tuning circuit and method for frequency tuning
    4.
    发明授权
    Frequency tuning circuit, use of the tuning circuit and method for frequency tuning 有权
    频率调谐电路，使用调谐电路和频率调谐方法

    公开(公告)号：US07847642B2

    公开(公告)日：2010-12-07

    申请号：US11641330

    申请日：2006-12-19

    申请人： Harald Pretl

    发明人： Harald Pretl

    IPC分类号： H03L7/091 ,  H03L7/093

    CPC分类号： H03B5/366 ,  H03B2201/0266 ,  H03J2200/10 ,  H03L7/1976

    摘要： A frequency tuning circuit includes a connection for coupling to a signal tap of an element which has a resonant frequency. The tuning circuit contains a controllable-capacitance capacitance array for tuning of a signal frequency of the element. The capacitance array has a multiplicity of capacitances which can be connected to a control connection via a signal. In this case, the capacitance array is coupled to the connection. A control input is used to supply a digital control word. Furthermore, the tuning circuit contains a sigma-delta modulator whose input side is coupled to the control input and whose output side is coupled to the control connection of the capacitance array. This makes it possible to produce a tuning word by means of which the effective resolution of the capacitance array can be increased.

    摘要翻译： 频率调谐电路包括用于耦合到具有谐振频率的元件的信号抽头的连接。 调谐电路包含用于调谐元件的信号频率的可控电容电容阵列。 电容阵列具有多个电容，其可以经由信号连接到控制连接。 在这种情况下，电容阵列耦合到连接。 控制输入​​用于提供数字控制字。 此外，调谐电路包含一个Σ-Δ调制器，其输入端耦合到控制输入，其输出端耦合到电容阵列的控制连接。 这使得可以产生可以增加电容阵列的有效分辨率的调谐字。

    Loop filter and phase-locked loop
    7.
    发明申请
    Loop filter and phase-locked loop 有权
    环路滤波器和锁相环路

    公开(公告)号：US20080191759A1

    公开(公告)日：2008-08-14

    申请号：US11704544

    申请日：2007-02-09

    申请人： Burkhard Neurauter ,  Harald Pretl ,  Rastislav Vazny ,  Thomas Greifeneder

    发明人： Burkhard Neurauter ,  Harald Pretl ,  Rastislav Vazny ,  Thomas Greifeneder

    IPC分类号： H03L7/08

    CPC分类号： H03L7/0895 ,  H03D13/004 ,  H03L7/0891 ,  H03L7/093 ,  H03L7/1976

    摘要： A loop filter includes an input terminal, an output terminal, and a control terminal for a selection signal. At least one low pass filter is disposed between that input terminal and that output terminal. The loop filter is adapted to select a configuration out of a first configuration and at least one second configuration in response to the selection signal. In the first configuration, the loop filter comprises a non-integrating transfer characteristic in operation. In the second configuration, the loop filter comprises an integrating signal transfer characteristic in operation.

    摘要翻译： 环路滤波器包括输入端子，输出端子和用于选择信号的控制端子。 在该输入端子和该输出端子之间设置至少一个低通滤波器。 环路滤波器适于响应于选择信号从第一配置和至少一个第二配置中选择配置。 在第一配置中，环路滤波器包括操作中的非积分传递特性。 在第二配置中，环路滤波器包括操作中的积分信号传输特性。

    Circuit and method for phase locked loop charge pump biasing
    8.
    发明授权
    Circuit and method for phase locked loop charge pump biasing 有权
    锁相环电荷泵偏置的电路和方法

    公开(公告)号：US06989718B2

    公开(公告)日：2006-01-24

    申请号：US10760766

    申请日：2004-01-20

    申请人： Harald Pretl ,  Michael Wilhelm

    发明人： Harald Pretl ,  Michael Wilhelm

    IPC分类号： H03L7/00

    CPC分类号： H03L7/099 ,  H03L7/0898

    摘要： Phase locked loops systems and control apparatus therefor are presented, in which a first charge pump bias current is generated according to a sensed VCO tuning voltage and a second generally constant bias current is provided. The provision of the first and second bias currents allows compensation for non-linear VCO tuning sensitivity. Methods are also presented for biasing a charge pump, including selectively providing a first current to the charge pump using a first current source, controlling the first current according to a VCO tuning voltage of the phase locked loop system, and providing a substantially constant second current to the charge pump.

    摘要翻译： 提出了锁相环系统及其控制装置，其中根据所感测的VCO调谐电压产生第一电荷泵偏置电流，并且提供第二大体上恒定的偏置电流。 提供第一和第二偏置电流允许补偿非线性VCO调谐灵敏度。 还提出了用于偏置电荷泵的方法，包括使用第一电流源选择性地向电荷泵提供第一电流，根据锁相环系统的VCO调谐电压来控制第一电流，以及提供基本恒定的第二电流 到电荷泵。

    Amplifier arrangement with controllable gain and method for controlling an amplifier gain
    9.
    发明授权
    Amplifier arrangement with controllable gain and method for controlling an amplifier gain 有权
    具有可控增益的放大器布置和用于控制放大器增益的方法

    公开(公告)号：US07446605B2

    公开(公告)日：2008-11-04

    申请号：US11528254

    申请日：2006-09-27

    申请人： Hans Pletzer ,  Werner Schelmbauer ,  Harald Pretl

    发明人： Hans Pletzer ,  Werner Schelmbauer ,  Harald Pretl

    IPC分类号： H03G3/20

    CPC分类号： H03G1/0005 ,  H03F1/223 ,  H03F3/72 ,  H03F2200/366 ,  H03F2200/453 ,  H03F2200/456 ,  H03F2203/7236

    摘要： An amplifier arrangement with controllable gain includes a first and a second amplifier device which each have a control input to receive a control signal to adjust a gain factor of the respective amplifier device. A control device is provided which is coupled to the second amplifier device to derive an effective gain factor of the second amplifier device as a function of the control signal. The control device further includes a control output coupled to the respective control inputs of the first and the second amplifier device to provide the control signal depending on a desired gain factor and the effective gain factor.

    摘要翻译： 具有可控增益的放大器装置包括第一和第二放大器装置，每个放大器装置具有控制输入以接收控制信号以调整各个放大器装置的增益因子。 提供控制装置，其耦合到第二放大器装置以根据控制信号导出第二放大器装置的有效增益因子。 控制装置还包括耦合到第一和第二放大器装置的相应控制输入的控制输出，以根据期望的增益因子和有效增益因子提供控制信号。

    Frequency tuning circuit, use of the tuning circuit and method for frequency tuning
    10.
    发明申请
    Frequency tuning circuit, use of the tuning circuit and method for frequency tuning 有权
    频率调谐电路，使用调谐电路和频率调谐方法

    公开(公告)号：US20070222527A1

    公开(公告)日：2007-09-27

    申请号：US11641330

    申请日：2006-12-19

    申请人： Harald Pretl

    发明人： Harald Pretl

    IPC分类号： H03L7/00

    CPC分类号： H03B5/366 ,  H03B2201/0266 ,  H03J2200/10 ,  H03L7/1976

    摘要： A frequency tuning circuit includes a connection for coupling to a signal tap of an element which has a resonant frequency. The tuning circuit contains a controllable-capacitance capacitance array for tuning of a signal frequency of the element. The capacitance array has a multiplicity of capacitances which can be connected to a control connection via a signal. In this case, the capacitance array is coupled to the connection. A control input is used to supply a digital control word. Furthermore, the tuning circuit contains a sigma-delta modulator whose input side is coupled to the control input and whose output side is coupled to the control connection of the capacitance array. This makes it possible to produce a tuning word by means of which the effective resolution of the capacitance array can be increased.

    摘要翻译： 频率调谐电路包括用于耦合到具有谐振频率的元件的信号抽头的连接。 调谐电路包含用于调谐元件的信号频率的可控电容电容阵列。 电容阵列具有多个电容，其可以经由信号连接到控制连接。 在这种情况下，电容阵列耦合到连接。 控制输入​​用于提供数字控制字。 此外，调谐电路包含一个Σ-Δ调制器，其输入端耦合到控制输入，其输出端耦合到电容阵列的控制连接。 这使得可以产生可以增加电容阵列的有效分辨率的调谐字。