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    Programmable Baseband Filters Supporting Auto-Calibration for a Mobile Digital Cellular Television Environment
    2.
    发明申请
    Programmable Baseband Filters Supporting Auto-Calibration for a Mobile Digital Cellular Television Environment 有权
    支持移动数字蜂窝电视环境自动校准的可编程基带滤波器

    公开(公告)号：US20120282874A1

    公开(公告)日：2012-11-08

    申请号：US13466693

    申请日：2012-05-08

    申请人： Spyridon Charalabos KAVADIAS

    发明人： Spyridon Charalabos KAVADIAS

    IPC分类号： H04B1/16

    CPC分类号： H04B1/28 ,  H03J3/06 ,  H04B1/1036 ,  H04H20/57 ,  H04H40/27

    摘要： Methods and systems for programmable baseband filters supporting auto-calibration in a mobile digital cellular television environment are provided. Aspects of the method may include generating within a single-chip multi-band RF receiver, at least one control signal based on signal strength of a baseband frequency signal generated within the single-chip multi-band RF receiver. A bandwidth of a filter integrated within the single-chip multi-band RF receiver may be adjusted via the generated at least one control signal. The filter may be used for filtering the generated baseband frequency signal. A frequency response signal of the filter integrated within the single-chip multi-band RF receiver may be determined via a reference frequency signal. An attenuated reference frequency signal may be generated by attenuating the reference frequency signal. The attenuated reference frequency signal may be compared with the frequency response signal. The at least one control signal may be generated based on the comparison.

    摘要翻译： 提供了在移动数字蜂窝电视环境中支持自动校准的可编程基带滤波器的方法和系统。 该方法的方面可以包括在单芯片多频带RF接收机内生成基于在单芯片多频带RF接收机内生成的基带频率信号的信号强度的至少一个控制信号。 集成在单芯片多频带RF接收机内的滤波器的带宽可以经由所生成的至少一个控制信号进行调整。 滤波器可以用于对生成的基带频率信号进行滤波。 可以通过参考频率信号来确定集成在单芯片多频带RF接收机内的滤波器的频率响应信号。 可以通过衰减参考频率信号来产生衰减的参考频率信号。 衰减的参考频率信号可以与频率响应信号进行比较。 可以基于比较来生成至少一个控制信号。

    SWITCH-ABLE BAND-TRACKING INPUT FILTER FOR COMBINATION TUNER
    3.
    发明申请
    SWITCH-ABLE BAND-TRACKING INPUT FILTER FOR COMBINATION TUNER 失效
    用于组合调谐器的开关带跟踪输入滤波器

    公开(公告)号：US20090215415A1

    公开(公告)日：2009-08-27

    申请号：US11574972

    申请日：2005-09-02

    申请人： Yeow T. Toh ,  Kam C. Kwong

    发明人： Yeow T. Toh ,  Kam C. Kwong

    IPC分类号： H04N5/60

    CPC分类号： H03J5/244 ,  H03J3/06

    摘要： The present invention relates to a combination RF tuner capable of receiving signals from the FM radio band and from the TV band. Prior art combination tuners had to compromise in quality resulting in combination tuners that neither exhibited high-end FMnor TV-signal reception behavior. A combination RF tuner capable of optimal receiving an FM-radio signal type and a TV signal type, comprising a switch-able tuned input filter (440), is proposed. One response of the input filter (440) provides a sufficient big bandwidth for enabling reception of the TV-signal type. The input filter (440) of the invention can be switched, providing a second response that has a smaller bandwidth for enabling reception of the FM-radio signal type. The second response can be realized by substantially bypassing an 10 inductive element (450) (e.g., comprising a inductor, L21, in series with a damping resistor, R3) of the input filter (440).

    摘要翻译： 本发明涉及能够从FM无线电频带和TV频带接收信号的组合RF调谐器。 现有技术的组合调谐器必须在质量上妥协，导致组合调谐器既不显示高端FMNOR TV信号接收行为。 提出了能够最佳地接收FM无线电信号类型和TV信号类型的组合RF调谐器，其包括可切换调谐的输入滤波器（440）。 输入滤波器（440）的一个响应提供足够大的带宽以便能够接收TV信号类型。 可以切换本发明的输入滤波器（440），提供具有较小带宽的第二响应，以使得能够接收FM无线电信号类型。 第二响应可以通过基本上绕过输入滤波器（440）的10个感应元件（450）（例如，包括与阻尼电阻器R3串联的电感器L21）来实现。

    Bandpass filter with integrated variable gain function using improved resistor array
    5.
    发明授权
    Bandpass filter with integrated variable gain function using improved resistor array 有权
    带通滤波器，具有集成可变增益功能，采用改进的电阻阵列

    公开(公告)号：US07376409B2

    公开(公告)日：2008-05-20

    申请号：US10879588

    申请日：2004-06-30

    申请人： Meng-An Pan

    发明人： Meng-An Pan

    IPC分类号： H04B1/10

    CPC分类号： H04B1/123 ,  H03G3/3052 ,  H03G2201/706 ,  H03J3/06

    摘要： The invention enables a gain adjustment in a receiver to improve signal quality by varying resistance of an input resistor array of a bandpass filter, the array having a plurality of resistors in series with switches that out of the path of the current when the resistors are in use.

    摘要翻译： 本发明使接收机中的增益调整能够通过改变带通滤波器的输入电阻阵列的电阻来改善信号质量，该阵列具有与当电阻器处于电流时电流路径之外的开关串联的多个电阻器 使用。

    Low Noise, High Linearity TV Tuner Architecture with Switched Fixed-Gain LNA
    6.
    发明申请
    Low Noise, High Linearity TV Tuner Architecture with Switched Fixed-Gain LNA 审中-公开
    低噪声，高线性电视调谐器结构，带开关固定增益LNA

    公开(公告)号：US20070105514A1

    公开(公告)日：2007-05-10

    申请号：US11423455

    申请日：2006-06-12

    申请人： Chao-Wen Tseng ,  Wai Lau

    发明人： Chao-Wen Tseng ,  Wai Lau

    IPC分类号： H04B1/18

    CPC分类号： H03J3/06 ,  H03F1/0277 ,  H03F2200/294 ,  H03F2200/372 ,  H03G1/0088 ,  H04B1/16

    摘要： A TV tuner includes a plurality of amplifiers having inputs for coupling to an antenna, a plurality of filters having inputs coupled to outputs of the plurality of amplifiers, and a first multiplexer having inputs coupled to outputs of the plurality of filters, the first multiplexer for selecting an output of one of the filters. The TV tuner further includes a mixer having an input coupled to an output of the first multiplexer, and an output amplifier having an input coupled to an output of the mixer and an output for providing output of the TV tuner.

    摘要翻译： 电视调谐器包括具有用于耦合到天线的输入的多个放大器，具有耦合到多个放大器的输出的输入的多个滤波器和具有耦合到多个滤波器的输出的输入的第一多路复用器，第一多路复用器 选择其中一个过滤器的输出。 TV调谐器还包括具有耦合到第一多路复用器的输出的输入的混频器，以及输出耦合到混频器的输出的输出端和用于提供TV调谐器的输出的输出。

    Bandpass filters with automatic tuning adjustment
    8.
    发明授权
    Bandpass filters with automatic tuning adjustment 有权
    带通滤波器，具有自动调谐调节

    公开(公告)号：US06307443B1

    公开(公告)日：2001-10-23

    申请号：US09405247

    申请日：1999-09-24

    申请人： Thaddeus J. Gabara

    发明人： Thaddeus J. Gabara

    IPC分类号： H03H712

    CPC分类号： H03J3/06 ,  H03H7/12

    摘要： A method and system for tuning a tunable bandpass filter includes a bandpass filter having a passband which is dependant on the value of a tuning signal. A data signal having a dominant frequency component is applied to the filter and the power of the signal passed by the filter is determined. The tuning signal is adjusted until the passed power is maximized, indicating that the filter is tuned to the dominant frequency. The tuning signal can then be applied to other tunable circuits, including an oscillator having an output used as a clock signal to extract data from the data signal applied to the filter.

    摘要翻译： 用于调谐可调谐带通滤波器的方法和系统包括具有取决于调谐信号的值的通带的带通滤波器。 具有主频分量的数据信号被施加到滤波器，并且确定由滤波器通过的信号的功率。 调整调谐信号直到通过的功率最大化，表明滤波器被调谐到主频。 然后，调谐信号可以应用于其它可调电路，包括具有用作时钟信号的输出的振荡器，以从施加到滤波器的数据信号中提取数据。

    UHF electronic tuner
    9.
    发明授权
    UHF electronic tuner 失效
    UHF电子调谐器

    公开(公告)号：US4145659A

    公开(公告)日：1979-03-20

    申请号：US800422

    申请日：1977-05-25

    申请人： Adolf E. Wolfram

    发明人： Adolf E. Wolfram

    IPC分类号： H03J3/06 ,  H03J3/18 ,  H04B1/26

    CPC分类号： H03J3/06 ,  H03J3/185

    摘要： A high input selectivity UHF varactor tuner for a television receiver in which unamplified radio frequency signals are inductively coupled to a double tuned half-wave preselector comprising two aperture coupled half-wave tuned lines in separate resonant cavities. The double tuned preselector includes varactor diodes on one end of each tuned line and fixed capacitors on the other end of each line. To compensate for decreasing Q of the varactor diodes with decreasing frequency and thereby maintain a uniform bandwidth for the tuner over the entire UHF spectrum, inductive coupling is provided between the tuned lines at the fixed capacitor ends which, during low frequency operation of the tuner, augments aperture coupling between the lines.

    摘要翻译： 用于电视接收机的高输入选择性UHF变容二极管调谐器，其中非放大射频信号电感耦合到双调谐半波预选器，其包括在分离的谐振腔中的两个孔耦合半波调谐线。 双调谐预选器包括每个调谐线的一端的变容二极管和每条线的另一端的固定电容器。 为了补偿频率降低的变容二极管的Q减小，从而在整个UHF频谱上保持调谐器的均匀带宽，在固定电容器端的调谐线路之间提供电感耦合，在调谐器的低频操作期间， 增加线路之间的孔径耦合。