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1. 发明公开

KR1020070074570A 다중 대역 디지털 오디오 방송 수신기 无效
标题翻译：多频数字音频广播接收器
公开(公告)号：KR1020070074570A
公开(公告)日：2007-07-12
申请号：KR1020077009091
申请日：2005-09-12
申请人： 프론티어 실리콘 리미티드
发明人： 러프그윌림프란시스 , 트룹니콜라스마크 , 턴커센캔 , 에도웨즈데이비드
IPC分类号： H04N7/00 , H04N7/015
CPC分类号： H03J5/244 , H03J1/005 , H03J2200/10 , H04B1/0064 , H04B1/0078 , H04B1/0082 , H04H40/18 , H04H2201/20
摘要： This invention relates to improved architectures for digital audio broadcast (DAB) receivers, in particular multiband DAB receivers. A digital audio broadcast (DAB) receiver, the receiver comprising: an rf input to receive rf signals in at least two receive frequency bands; a local oscillator having a local oscillator signal output; a mixer having inputs coupled to said rf input and to said local oscillator and having an output to provide an IF frequency signal; and an output to provide an output signal from said IF frequency signal; and wherein said local oscillator comprises a phase locked loop (PLL) including a tunable voltage controlled oscillator (VCO) and a programmable divider coupled to an output of said voltage controlled oscillator to provide said local oscillator signal output; at least one of said two receive frequency bands being associated with a plurality of different division ratios of said programmable divider; wherein said voltage controlled oscillator (VCO) has a plurality of selectable VCO frequency bands; and wherein said local oscillator further comprises a VCO band selector to select a said VCO frequency band; whereby said at least two receive frequency bands are covered by said receiver by a combination of said VCO band selection and said plurality of different division ratios.
摘要翻译：本发明涉及用于数字音频广播（DAB）接收机，特别是多频带DAB接收机的改进的架构。一种数字音频广播（DAB）接收机，所述接收机包括：用于在至少两个接收频带中接收rf信号的rf输入; 具有本地振荡器信号输出的本地振荡器; 混频器，具有耦合到所述RF输入和所述本地振荡器并具有输出以提供IF频率信号的输入; 以及输出，用于提供来自所述IF频率信号的输出信号; 并且其中所述本地振荡器包括锁相环（PLL），所述锁相环包括可调谐压控振荡器（VCO）和耦合到所述压控振荡器的输出的可编程分频器，以提供所述本地振荡器信号输出; 所述两个接收频带中的至少一个与所述可编程分频器的多个不同分频比相关联; 其中所述压控振荡器（VCO）具有多个可选择的VCO频带; 并且其中所述本地振荡器还包括选择所述VCO频带的VCO频带选择器; 由此所述至少两个接收频带由所述接收机通过所述VCO频带选择和所述多个不同分频比的组合来覆盖。

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