<p>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.</p>
申请公布号
WO2006087506(A1)
申请公布日期
2006.08.24
申请号
WO2005GB50151
申请日期
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