公开(公告)号：US20100255802A1

公开(公告)日：2010-10-07

申请号：US12417512

申请日：2009-04-02

申请人： Tzu-wang Pan ,  Yi Zeng ,  I-Hsiang Lin ,  Pushp K. Trikha ,  Jeremy D. Dunworth ,  Rahul Apte

发明人： Tzu-wang Pan ,  Yi Zeng ,  I-Hsiang Lin ,  Pushp K. Trikha ,  Jeremy D. Dunworth ,  Rahul Apte

IPC分类号： H04B1/16

CPC分类号： H04B1/3805 ,  H04B15/06

摘要： An FM radio with a wide frequency range operates in a cell phone without interfering with the VCO of the RF transceiver. The FM transceiver generates a VCO signal whose frequency varies by less than ±7% from the midpoint of a narrow first range. A synthesizer signal is generated by dividing the VCO frequency by a first divisor such that the synthesizer frequency varies over a lower frequency second range. The VCO frequency is also divided by a second divisor such that the synthesizer frequency varies over a third range. The upper limit of the second range falls at the lower limit of the third range. The lower limit of the second range is 85.5 MHz and the upper limit of the third range is 108.0 MHz. By also using a third divisor, a synthesizer signal with a range of 76-108 MHz is generated from the narrow first frequency range.

摘要翻译： 具有宽频率范围的FM收音机在手机中工作，而不会干扰RF收发器的VCO。 FM收发器产生一个VCO信号，其频率从窄的第一范围的中点变化小于±7％。 通过将VCO频率除以第一因子来产生合成器信号，使得合成器频率在较低频率的第二范围内变化。 VCO频率也被第二除数除以使得合成器频率在第三范围内变化。 第二范围的上限落在第三范围的下限。 第二范围的下限为85.5MHz，第三范围的上限为108.0MHz。 通过使用第三除数，从窄的第一频率范围产生具有76-108MHz范围的合成器信号。

公开(公告)号：US08254849B2

公开(公告)日：2012-08-28

申请号：US12417512

申请日：2009-04-02

申请人： Tzu-wang Pan ,  Yi Zeng ,  I-Hsiang Lin ,  Pushp K. Trikha ,  Jeremy D. Dunworth ,  Rahul Apte

发明人： Tzu-wang Pan ,  Yi Zeng ,  I-Hsiang Lin ,  Pushp K. Trikha ,  Jeremy D. Dunworth ,  Rahul Apte

IPC分类号： H04B1/06

CPC分类号： H04B1/3805 ,  H04B15/06

摘要： An FM radio with a wide frequency range operates in a cell phone without interfering with the VCO of the RF transceiver. The FM transceiver generates a VCO signal whose frequency varies by less than ±7% from the midpoint of a narrow first range. A synthesizer signal is generated by dividing the VCO frequency by a first divisor such that the synthesizer frequency varies over a lower frequency second range. The VCO frequency is also divided by a second divisor such that the synthesizer frequency varies over a third range. The upper limit of the second range falls at the lower limit of the third range. The lower limit of the second range is 85.5 MHz and the upper limit of the third range is 108.0 MHz. By also using a third divisor, a synthesizer signal with a range of 76-108 MHz is generated from the narrow first frequency range.

摘要翻译： 具有宽频率范围的FM收音机在手机中工作，而不会干扰RF收发器的VCO。 FM收发器产生一个VCO信号，其频率从窄的第一范围的中点变化小于±7％。 通过将VCO频率除以第一因子来产生合成器信号，使得合成器频率在较低频率的第二范围内变化。 VCO频率也被第二除数除以使得合成器频率在第三范围内变化。 第二范围的上限落在第三范围的下限。 第二范围的下限为85.5MHz，第三范围的上限为108.0MHz。 通过使用第三除数，从窄的第一频率范围产生具有76-108MHz范围的合成器信号。