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    • 1. 发明公开
    • 다수의 피드백 소스를 사용하여 AGC 기능을 제공하는 장치 및 방법
    • 使用多个反馈源提供AGC功能的装置和方法
    • KR1020060033908A
    • 2006-04-20
    • KR1020067000873
    • 2004-07-08
    • 톰슨 라이센싱
    • 헛친슨,다니엘,마크에코프,클린트,알란그럽스,개리,딘매이어,매튜,토마스
    • H04N5/52
    • H03G3/3052H03G3/3068H04N5/4401H04N5/46H04N5/52
    • An apparatus (20) such as a television signal receiver provides an AGC function by using multiple feedback sources which provide both narrow band and wide band AGC signals in an adaptive manner. According to an exemplary embodiment, the apparatus (20) includes a tuner (10, 15, 20, 25, 30) operative to generate first and second IF signals. A first demodulator (40) is operative to generate a first AGC signal responsive to the first IF signal. A second demodulator (50) is operative to generate a second AGC signal responsive to the second IF signal. A wide band AGC detector (60) is operative to generate a third AGC signal responsive to at least one of the first and second IF signals. A switch (70) is operative to selectively provide one of the first, second and third AGC signals to the tuner (10, 15, 20, 25, 30) responsive to a predetermined condition.
    • 诸如电视信号接收机的装置(20)通过使用以自适应方式提供窄带和宽带AGC信号的多个反馈源来提供AGC功能。 根据示例性实施例,装置(20)包括可操作以产生第一和第二IF信号的调谐器(10,15,20,25,30)。 第一解调器(40)用于响应于第一IF信号产生第一AGC信号。 第二解调器(50)用于响应于第二IF信号产生第二AGC信号。 宽带AGC检测器(60)用于响应于第一和第二IF信号中的至少一个产生第三AGC信号。 开关(70)可操作以响应于预定条件而选择性地将第一,第二和第三AGC信号中的一个提供给调谐器(10,15,20,25,30)。