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1. 发明申请

WO2006087506A1 MULTIBAND DIGITAL AUDIO BROADCAST RECEIVER 审中-公开
标题翻译：多频数字音频广播接收器
公开(公告)号：WO2006087506A1
公开(公告)日：2006-08-24
申请号：PCT/GB2005/050151
申请日：2005-09-12
申请人： Frontier Silicon Limited , LUFF, Gwilym Francis , TROOP, Nicholas Mark , TUNCER, Sencan , EDDOWES, David
发明人： LUFF, Gwilym Francis , TROOP, Nicholas Mark , TUNCER, Sencan , EDDOWES, David
IPC分类号： H03D7/16 , H04H1/00
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. 发明申请

WO2006032932A1 RF INPUT STAGE FOR LOW NOISE AMPLIFIER OR MIXER 审中-公开
标题翻译：低噪声放大器或混频器的射频输入级
公开(公告)号：WO2006032932A1
公开(公告)日：2006-03-30
申请号：PCT/GB2005/050149
申请日：2005-09-12
申请人： FRONTIER SILICON LIMITED , TROOP, Nicholas Mark
发明人： TROOP, Nicholas Mark
IPC分类号： H03F1/56
CPC分类号： H03F3/4508 , H03F1/565 , H03F3/19 , H03F2200/294 , H03F2200/372 , H03F2203/45512 , H03F2203/45554 , H03F2203/45556 , H03F2203/45562
摘要： This invention generally relates to radio frequency circuits, more particularly to circuits such as amplifier circuits, having a high dynamic range. Embodiments of the invention are particularly suitable for use in the front end of a Broadcast Radio Receiver such as a digital audio broadcast (DAB) receiver. An rf amplifier circuit, the circuit comprising: first and second inputs; at least one output; first and second inductors each having first and second connections, said first connections of said first and second inductors being respectively coupled to said first and second inputs; first and second transistors, each having at least a control connection., an input connection and an output connection, said input connections of said first and second transistors being respectively coupled to said second connections of said first and second inductors, said control connections of said first and second transistors each having a bias, and at least one of said output connections of said first and second transistors being coupled to said at least one output; and wherein said control connections of said first transistors is capacitatively coupled to said first inductor of said second inductor and said control connection of said second transistors is capacitively coupled to said first connection of said first inductor.
摘要翻译：本发明一般涉及射频电路，更具体地说涉及具有高动态范围的诸如放大器电路的电路。本发明的实施例特别适用于诸如数字音频广播（DAB）接收机的广播无线电接收机的前端。一种RF放大器电路，该电路包括：第一和第二输入; 至少一个输出; 第一和第二电感器各自具有第一和第二连接，所述第一和第二电感器的所述第一连接分别耦合到所述第一和第二输入; 第一和第二晶体管，每个具有至少一个控制连接，输入连接和输出连接，所述第一和第二晶体管的所述输入连接分别耦合到所述第一和第二电感器的所述第二连接，所述控制连接第一和第二晶体管各自具有偏置，并且所述第一和第二晶体管的所述输出连接中的至少一个耦合到所述至少一个输出; 并且其中所述第一晶体管的所述控制连接电容耦合到所述第二电感器的所述第一电感器，并且所述第二晶体管的所述控制连接电容耦合到所述第一电感器的所述第一连接。

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