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1. 发明授权

US08238857B2 Apparatus and method for performing attenuation function in cable broadcast receiver 有权
标题翻译：在有线广播接收机中执行衰减功能的装置和方法
公开(公告)号：US08238857B2
公开(公告)日：2012-08-07
申请号：US12645808
申请日：2009-12-23
申请人： Sang-Yeon Moon , Geun-Sik Yun , Dong-Uk Seo , Sung-Soo Lee , Hyun-Jun Kim
发明人： Sang-Yeon Moon , Geun-Sik Yun , Dong-Uk Seo , Sung-Soo Lee , Hyun-Jun Kim
IPC分类号： H04B17/02
CPC分类号： H03G3/3052
摘要： An apparatus and a method for performing an attenuation function on a signal using an attenuator in a cable broadcast receiver having a Low Noise Amplifier (LNA) that does not perform an attenuation function on a signal are provided. In the method, an input Radio Frequency (RF) signal is tuned, The RF signal is converted into an Intermediate Frequency (IF) signal. An intensity of the converted IF signal is compared to a threshold, and an RF Automatic Gain Control (AGC) value is generated based on a result of the comparison. When the generated RF AGC value is smaller than an RF AGC threshold, the attenuator is turned on to attenuate the input RF signal by a predefined amount. Therefore, a high SNR, such as in an analog-digital composite signal, may be obtained without using an LNA that performs an attenuation function on a signal.
摘要翻译：提供一种用于在具有不对信号执行衰减功能的低噪声放大器（LNA）的有线广播接收机中使用衰减器对信号执行衰减功能的装置和方法。在该方法中，调谐输入射频（RF）信号，将RF信号转换成中频（IF）信号。将转换的IF信号的强度与阈值进行比较，并且基于比较的结果生成RF自动增益控制（AGC）值。当所生成的RF AGC值小于RF AGC阈值时，衰减器导通，以将输入RF信号衰减预定量。因此，可以在不使用对信号执行衰减功能的LNA的情况下获得诸如模拟数字复合信号中的高SNR。

2. 发明申请

US20100159863A1 APPARATUS AND METHOD FOR PERFORMING ATTENUATION FUNCTION IN CABLE BROADCAST RECEIVER 有权
标题翻译：电缆广播接收机执行衰减功能的装置及方法
公开(公告)号：US20100159863A1
公开(公告)日：2010-06-24
申请号：US12645808
申请日：2009-12-23
申请人： Sang-Yeon MOON , Geun-Sik YUN , Dong-Uk SEO , Sung-Soo LEE , Hyun-Jun KIM
发明人： Sang-Yeon MOON , Geun-Sik YUN , Dong-Uk SEO , Sung-Soo LEE , Hyun-Jun KIM
IPC分类号： H04B7/00
CPC分类号： H03G3/3052
摘要： An apparatus and a method for performing an attenuation function on a signal using an attenuator in a cable broadcast receiver having a Low Noise Amplifier (LNA) that does not perform an attenuation function on a signal are provided. In the method, an input Radio Frequency (RF) signal is tuned, The RF signal is converted into an Intermediate Frequency (IF) signal. An intensity of the converted IF signal is compared to a threshold, and an RF Automatic Gain Control (AGC) value is generated based on a result of the comparison. When the generated RF AGC value is smaller than an RF AGC threshold, the attenuator is turned on to attenuate the input RF signal by a predefined amount. Therefore, a high SNR, such as in an analog-digital composite signal, may be obtained without using an LNA that performs an attenuation function on a signal.
摘要翻译：提供一种用于在具有不对信号执行衰减功能的低噪声放大器（LNA）的有线广播接收机中使用衰减器对信号执行衰减功能的装置和方法。在该方法中，调谐输入射频（RF）信号，将RF信号转换成中频（IF）信号。将转换的IF信号的强度与阈值进行比较，并且基于比较的结果生成RF自动增益控制（AGC）值。当所生成的RF AGC值小于RF AGC阈值时，衰减器导通，以将输入RF信号衰减预定量。因此，可以在不使用对信号执行衰减功能的LNA的情况下获得诸如模拟数字复合信号中的高SNR。

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