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26 条记录 (耗时 0.045 秒)

    RF-DAC CELL AND METHOD FOR PROVIDING AN RF OUTPUT SIGNAL
    11.
    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。

    Frequency tuning circuit, use of the tuning circuit and method for frequency tuning
    12.
    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
    14.
    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
    15.
    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。

    Low-noise amplifying circuit
    16.
    发明授权
    Low-noise amplifying circuit 失效
    低噪声放大电路

    公开(公告)号：US07057457B2

    公开(公告)日：2006-06-06

    申请号：US10482651

    申请日：2002-06-19

    申请人： Robert-Grant Irvine ,  Harald Pretl ,  Claus Stoeger ,  Wolfgang Thomann

    发明人： Robert-Grant Irvine ,  Harald Pretl ,  Claus Stoeger ,  Wolfgang Thomann

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45188 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45386 ,  H03F2203/45394 ,  H03F2203/45396 ,  H03F2203/45616 ,  H03F2203/7236

    摘要： A low-noise amplifier circuit is specified which has a switchable gain ratio. For this purpose, a parallel circuit comprising a first and a second current path (3, 4) is provided between a radio-frequency signal input and output (1, 2), with the first current path (3) having a transistor which is connected in a common-base circuit for signal amplification, and the second current path (4) having a transistor which is connected in a common-emitter circuit (7) for signal amplification, and has input impedance matching (25, 27). Owing to the good noise characteristics and the good linearity characteristics, the described low-noise amplifier circuit is suitable for use in radio-frequency receivers in which adaptive pre-amplification is required even before a frequency converter, that is to say at the radio-frequency level, because the input signal has a wide dynamic range, such as that in the case of UMTS.

    摘要翻译： 指定了具有可切换增益比的低噪声放大器电路。 为此，在射频信号输入和输出（1,2）之间提供包括第一和第二电流路径（3,4）的并联电路，其中第一电流路径（3）具有晶体管，其是 连接在用于信号放大的公共基极电路中，并且第二电流路径（4）具有连接在用于信号放大的共射极电路（7）中并具有输入阻抗匹配（25,27）的晶体管。 由于具有良好的噪声特性和良好的线性特性，所以所述的低噪声放大器电路适用于即使在频率转换器之前也需要自适应预放大的射频接收机，也就是说， 频率电平，因为输入信号具有宽的动态范围，例如在UMTS的情况下。

    Frequency tuning circuit, use of the tuning circuit and method for frequency tuning
    17.
    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。

    Circuit and method for phase locked loop charge pump biasing
    19.
    发明申请
    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：US20050156673A1

    公开(公告)日：2005-07-21

    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 ,  H03L7/089 ,  H03L7/099

    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。