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    • 4. 发明申请
    • TUNER INPUT FILTER WITH ELECTRONICALLY ADJUSTABLE CENTER FREQUENCY FOR ADAPTING TO ANTENNA CHARACTERISTIC
    • 具有电子可调谐中心频率的调谐器输入滤波器适应天线特性
    • WO2003092159A1
    • 2003-11-06
    • PCT/US2003/012871
    • 2003-04-25
    • THOMSON LICENSING S.A.PUGEL, Michael, AntonyGRUBBS, Gary, DeanHALL, Edward, AllenMUTERSPAUGH, Max, Ward
    • PUGEL, Michael, AntonyGRUBBS, Gary, DeanHALL, Edward, AllenMUTERSPAUGH, Max, Ward
    • H03J1/00
    • H04N5/50H03J1/0066H03J3/185H03J3/20H03J2200/28H04N5/52H04N21/4383H04N21/44209
    • A system, apparatus and/or method provides frequency response adjustment of an RF input filter (208) of an RF tuner (40) based on impedance of an antenna system (24) that is providing reception of RF signals to the RF tuner. The frequency response adjustment is preferably accomplished dynamically and/or with respect to each frequency tuned. Particularly, the system, method and/or apparatus provides compensation at the RF tuner level for mistuning effects produced on the RF tuner (40) by antenna system impedance (29) presented at the antenna input (30) that is other than a designed for impedance. Frequency response of an RF input filter (208, 216) for the RF tuner (40) is electronically adjustable with an independent or semi-independent control voltage signal based on one or more measured parameters of a tuning frequency. Frequency response adjustment may include adjustment of a center frequency of the RF input filter bandpass frequency range and/or altering the bandpass frequency range of the RF input filter. The subject invention expands the capability of an RF signal receiver, particularly one using at least one electronically adjustable RF filter at the input of an electronic alignment type tuner.
    • 基于正在向RF调谐器接收RF信号的天线系统(24)的阻抗,系统,装置和/或方法提供RF调谐器(40)的RF输入滤波器(208)的频率响应调整。 频率响应调整优选地动态地和/或关于调谐的每个频率实现。 特别地,系统,方法和/或设备在RF调谐器级别提供对在天线输入(30)上呈现的天线系统阻抗(29)在RF调谐器(40)上产生的失谐效应的补偿,该天线系统阻抗(29)不是为 阻抗。 用于RF调谐器(40)的RF输入滤波器(208,216)的频率响应基于调谐频率的一个或多个测量参数通过独立或半独立的控制电压信号进行电子可调。 频率响应调整可以包括调整RF输入滤波器带通频率范围的中心频率和/或改变RF输入滤波器的带通频率范围。 本发明扩展了RF信号接收机的能力,特别是在电子对准型调谐器的输入处使用至少一个电子可调节RF滤波器的能力。
    • 5. 发明申请
    • BI-DIRECTIONAL COMMUNICATION APPARATUS
    • 双向通信设备
    • WO2003056831A1
    • 2003-07-10
    • PCT/US2002/039412
    • 2002-12-10
    • THOMSON LICENSING S.A.RAMASWAMY, KumarHALL, Edward, Allen
    • RAMASWAMY, KumarHALL, Edward, Allen
    • H04N7/173
    • H04N7/20H04N7/17309
    • An apparatus includes a first signal receiving module, a second signal receiving module, and a signal transmitting module. The first signal receiving module is coupled between a first signal point and a third signal point for receiving a first RF signal from the first signal point. The first signal receiving module down-converts the first RF signal for providing a first down-converted signal at the third signal point. The second signal receiving module is coupled between a second signal point and the third signal point for receiving a second RF signal. The second signal receiving module down-converts said second RF signal for providing a second down-converted signal at the third signal point. The signal transmitting module is coupled between the first and second signal points and the third signal point for receiving a third RF signal from the third signal point. The signal transmitting module up-converts the third RF signal for selectively providing an up-converted signal at one of the first and second signal points in response to a selection signal.
    • 一种装置包括第一信号接收模块,第二信号接收模块和信号发射模块。 第一信号接收模块耦合在第一信号点和第三信号点之间,用于从第一信号点接收第一RF信号。 第一信号接收模块对第一RF信号进行下变频,以在第三信号点提供第一下变频信号。 第二信号接收模块耦合在第二信号点和用于接收第二RF信号的第三信号点之间。 第二信号接收模块对所述第二RF信号进行下变频,以在第三信号点处提供第二下变频信号。 信号发送模块耦合在第一和第二信号点和第三信号点之间,用于从第三信号点接收第三RF信号。 所述信号发送模块对所述第三RF信号进行升压转换,以响应于选择信号选择性地在所述第一和第二信号点之一提供上变频信号。