公开(公告)号：US20080295137A1

公开(公告)日：2008-11-27

申请号：US12124367

申请日：2008-05-21

申请人： ShouFang CHEN

发明人： ShouFang CHEN

IPC分类号： H04N7/20

CPC分类号： H04N7/20 ,  H04B1/18

摘要： A digital video broadcasting-satellite (DVB-S) multi-input receiving circuit and an associated method are provided to receive satellite input signals provided by a plurality of low noise blocks (LNB), thereby reducing the cost of DVB-S receivers. The DVB-S multi-input receiving circuit includes a selection circuit and a combiner. The selection circuit includes a plurality of signal paths for conveying a plurality of satellite input signals, and enables one of the signal paths to output one of the satellite input signals. The combiner combines the signal paths into a single signal path, which is coupled to a DVB-S tuner.

摘要翻译： 提供卫星数字视频广播（DVB-S）多输入接收电路和相关联的方法来接收由多个低噪声块（LNB）提供的卫星输入信号，从而降低DVB-S接收机的成本。 DVB-S多输入接收电路包括选择电路和组合器。 选择电路包括用于传送多个卫星输入信号的多个信号路径，并且使得信号路径之一能够输出卫星输入信号之一。 组合器将信号路径组合成单个信号路径，其耦合到DVB-S调谐器。

公开(公告)号：US20110116655A1

公开(公告)日：2011-05-19

申请号：US12163264

申请日：2008-06-27

申请人： ShouFang CHEN

发明人： ShouFang CHEN

IPC分类号： H03G5/00

CPC分类号： H03C3/0916 ,  H04H20/48

摘要： An apparatus and method for audio conversion is provided to upgrade the resolution of transmission frequency of an FM (frequency modulation) transmitter and reduce the size of the FM transmitter by applying frequency coarse tune and fine tune. The apparatus comprises a digital FM modulator, a digital frequency synthesizer, a signal converter, and an analog frequency converter. The digital FM modulator modulates a digital audio input signal into a first digital audio signal. The digital frequency synthesizer converts the first digital audio signal into a second digital audio signal, whose frequency is determined according to a first frequency conversion parameter. The signal converter converts the second digital audio signal into an analog audio signal. The analog frequency converter generates an audio transmission signal with a predetermined frequency according to a second clock signal and the analog audio signal while the second clock signal is generated according to a first clock signal.

摘要翻译： 提供了一种用于音频转换的装置和方法，以提高FM（调频）发射机的发射频率的分辨率，并通过应用频率粗调和微调来减小FM发射机的大小。 该装置包括数字FM调制器，数字频率合成器，信号转换器和模拟频率转换器。 数字FM调制器将数字音频输入信号调制成第一数字音频信号。 数字频率合成器将第一数字音频信号转换为第二数字音频信号，其频率根据第一频率转换参数确定。 信号转换器将第二数字音频信号转换为模拟音频信号。 模拟频率转换器根据第二时钟信号和模拟音频信号产生具有预定频率的音频传输信号，同时根据第一时钟信号产生第二时钟信号。