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公开(公告)号：US06553216B1
公开(公告)日：2003-04-22
申请号：US08572550
申请日：1995-12-14
IPC分类号： H04B118
CPC分类号： H03F3/191 , H03D7/18 , H03F2200/168 , H03H7/12 , H03H7/1766 , H03H7/1775 , H03J3/08
摘要： A tuner includes a tunable filter for selecting a desired RF signal in response to a tuning control signal and a tunable image trap for rejecting the undesired image signal corresponding to the desired RF signal responsive to the tuning control signal coupled in cascade between an RF amplifier and a mixer. The tunable trap also serves as an impedance transformation element between the tunable filter and said mixer. The arrangement is particularly useful in a tuner in which the frequency range of the local oscillator signal is below the frequency range of the received RF signals.
摘要翻译： 调谐器包括可调谐滤波器，用于响应于调谐控制信号选择所需的RF信号，以及可调谐图像陷波器，用于拒绝对应于所需RF信号的不需要的图像信号，所述调谐控制信号响应于串联耦合在RF放大器和 搅拌机 可调谐阱还用作可调滤波器和所述混频器之间的阻抗变换元件。 该装置在本地振荡器信号的频率范围低于所接收的RF信号的频率范围的调谐器中特别有用。
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公开(公告)号：US07202910B1
公开(公告)日：2007-04-10
申请号：US09959083
申请日：2000-04-20
IPC分类号： H04N7/18
CPC分类号： H04N5/50 , H04N5/4401 , H04N21/42638
摘要： An IF signal processing arrangement for processing both analog and digital signals is disclosed in the present application. The signal processing arrangement includes a signal source for providing one of digital and analog IF signals, a first SAW filter having an output for filtering the IF signal, digital signal processing circuitry coupled to the output for processing a filtered digital IF signal, and analog signal processing circuitry coupled to the output for processing which includes filtering a filtered analog signal.
摘要翻译： 在本申请中公开了用于处理模拟和数字信号的IF信号处理装置。 信号处理装置包括用于提供数字和模拟IF信号中的一个的信号源，具有用于对IF信号进行滤波的输出的第一SAW滤波器，耦合到输出的数字信号处理电路，用于处理滤波的数字IF信号，以及模拟信号 处理电路耦合到输出以进行处理，其包括滤波滤波的模拟信号。
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3.发明授权Apparatus and method for providing an AGC function using multiple feedback sources 有权使用多个反馈源提供AGC功能的装置和方法公开(公告)号：US07602448B2
公开(公告)日：2009-10-13
申请号：US10564345
申请日：2004-07-08
CPC分类号： H03G3/3052 , H03G3/3068 , H04N5/4401 , H04N5/46 , H04N5/52
摘要： 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.
摘要翻译： 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）。
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4.发明授权Apparatus and method for processing analog and digital signals from multiple signal sources 失效用于处理来自多个信号源的模拟和数字信号的装置和方法公开(公告)号：US07599009B2
公开(公告)日：2009-10-06
申请号：US10564428
申请日：2004-07-08
CPC分类号： H04N5/4401 , H04N5/46 , H04N5/52 , H04N21/42638 , H04N21/4382 , H04N21/6112 , H04N21/6118
摘要： An apparatus such as a television signal receiver employs an efficient and cost-effective signal processing architecture which enables, among other things, the reception and processing of both analog and digital signals from multiple signal sources, such as but not limited to, terrestrial and cable signal sources. According to an exemplary embodiment, the apparatus includes a first tuner operative to generate a first IF signal corresponding to a first RF signal. A first demodulator is operative to generate a first demodulated signal corresponding to the first IF signal. A second tuner is operative to generate a second IF signal corresponding to a second RE signal. A second demodulator is operative to generate a second demodulated signal corresponding to the second IF signal. A third demodulator is operative to generate a third demodulated signal corresponding to one of the first and second IF signals.
摘要翻译： 诸如电视信号接收机之类的装置采用有效且经济有效的信号处理架构，其特征在于能够接收和处理来自多个信号源（例如但不限于地面和电缆）的模拟和数字信号 信号源。 根据示例性实施例，该装置包括可操作以产生对应于第一RF信号的第一IF信号的第一调谐器。 第一解调器用于产生对应于第一IF信号的第一解调信号。 第二调谐器用于产生对应于第二RE信号的第二IF信号。 第二解调器用于产生对应于第二IF信号的第二解调信号。 第三解调器用于产生对应于第一和第二IF信号之一的第三解调信号。
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5.发明授权Method and apparatus for providing dual automatic gain control delay settings in a television receiver 失效用于在电视接收机中提供双重自动增益控制延迟设置的方法和装置公开(公告)号：US07317493B1
公开(公告)日：2008-01-08
申请号：US10031059
申请日：2000-07-13
CPC分类号： H04N5/52 , H04N5/46 , H04N21/42607
摘要： The present invention provides a method and apparatus for processing a received television signal comprising one of a first type of television signal and a second type of television signal. Specifically, the method comprises amplifying the received television signal in response to a control signal. If the received television signal comprises the first type of television signal, the RF amplifier gain is reduced when the received television signal exceeds a first signal level. If the received television signal comprises the second type of television signal, the RF amplifier gain is reduced when the received television signal exceeds a second signal level. The second signal level is greater than the first signal level. A concomitant apparatus is also provided. As the first signal level is lower for the first type of television signal, reception of the first type of television signal is improved.
摘要翻译： 本发明提供了一种用于处理包括第一类型的电视信号和第二类型的电视信号之一的接收的电视信号的方法和装置。 具体地，该方法包括响应于控制信号来放大所接收的电视信号。 如果所接收的电视信号包括第一类型的电视信号，则当所接收的电视信号超过第一信号电平时，RF放大器增益减小。 如果所接收的电视信号包括第二类型的电视信号，则当所接收的电视信号超过第二信号电平时，RF放大器增益减小。 第二信号电平大于第一信号电平。 还提供了一种伴随的装置。 当第一类电视信号的第一信号电平较低时，第一类电视信号的接收得到改善。
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