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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。

2. 发明公开

KR1020070069170A 저역 중간 주파수 라디오 수신기 회로들 无效
标题翻译：低频中频（如果）无线电接收器电路
公开(公告)号：KR1020070069170A
公开(公告)日：2007-07-02
申请号：KR1020077008933
申请日：2005-09-12
申请人： 프론티어 실리콘 리미티드
发明人： 러프그윌림프란시스
IPC分类号： H04B1/06
CPC分类号： H04B1/28 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D7/1483 , H03D7/165 , H03D2200/0025
摘要： This invention relates to apparatus and methods for radio receivers, in particular low (IP) frequency receivers. Embodiments of the invention are particularly suitable for digital audio broadcast receivers. A low-IF radio receiver circuit, the circuit comprising: an rf input (202) for a received rf signal: a first local oscillator (208) having a quadrature output to provide a quadrature first local oscillator signal at a first frequency; a quadrature first mixer (206) coupled to said rf input and to said quadrature output of said first local oscillator and having a quadrature first mixer output, and said first mixer and said first local oscillator being configured to provide quadrature mixing of said quadrature first local oscillator signal and said received rf signal to downconvert said received rf signal to a first quadrature IF signal at a first IF frequency; a bandpass filter (210) coupled to said quadrature first mixer output and having a filtered output to provide a bandpass filtered first IF signal; a second local oscillator (214) having a second local oscillator ourput to provide a second local oscillator signal at a second frequency; a second mixer (212) coupled to said filtered output of said bandpass filter and to said second local oscillator and having a second mixer ouput, said second mixer and said second local oscillator being configured to provide mixing of said second local oscillator signal and said bandpass filtered first IF signal to upconvert said bandpass filtered first IF signal to a second IF signal at a second IF freqquency, wherein said second IF frequency is greater than said first IF frequency; and an output coupled to said second mixer output to provide an output signal from said second IF signal.
摘要翻译：本发明涉及无线电接收机，特别是低（IP）频率接收机的装置和方法。本发明的实施例特别适用于数字音频广播接收机。一种低IF无线电接收机电路，所述电路包括：用于接收的rf信号的rf输入（202）：具有正交输出的第一本地振荡器（208），以提供第一频率的正交第一本地振荡器信号; 耦合到所述第一本地振荡器的所述rf输入和所述正交输出的正交第一混频器（206），并具有正交第一混频器输出，所述第一混频器和所述第一本地振荡器被配置为提供所述正交第一局部振荡器信号和所述接收的rf信号，以将所接收的rf信号以第一IF频率下转换成第一正交IF信号; 耦合到所述正交第一混频器输出并且具有滤波输出以提供带通滤波的第一IF信号的带通滤波器（210）具有第二本机振荡器的第二本地振荡器（214），用于以第二频率提供第二本地振荡器信号; 耦合到所述滤波器输出的所述带通滤波器和所述第二本机振荡器并具有第二混频器输出的第二混频器（212），所述第二混频器和所述第二本机振荡器被配置为提供所述第二本机振荡器信号和所述带通经过滤波的第一IF信号，以第二IF频率将所述带通滤波的第一IF信号上变频到第二IF信号，其中所述第二IF频率大于所述第一IF频率; 以及耦合到所述第二混频器输出以提供来自所述第二IF信号的输出信号的输出。

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