公开(公告)号：US07321754B2

公开(公告)日：2008-01-22

申请号：US10486332

申请日：2002-08-01

申请人： Emil Zellweger ,  Yves Oesch ,  Kilian Imfeld ,  Pierre-André Farine

发明人： Emil Zellweger ,  Yves Oesch ,  Kilian Imfeld ,  Pierre-André Farine

IPC分类号： H04B1/10

CPC分类号： H03D3/007 ,  H03D7/163

摘要： The radio-frequency signal frequency conversion device generates intermediate complex signals (IF) for a correlation stage of a low power RF receiver. In order to do this, the device includes a first selective pass-band filter for filtering radio-frequency signals picked up by an antenna. A frequency synthesizer generates first and second high frequency signals, wherein the frequency of the first signals is higher than the frequency of the second signals. This synthesizer receives reference signals from an oscillator unit. A first mixer unit mixes the radio-frequency signals with the first signals in order to generate frequency-converted signals. A second pass-band filter filters the signals from the first mixer unit, and provides signals to a second mixer unit to mix them with the second high frequency signals. Finally, shaping means for the signals provided by the second mixer unit generate the intermediate signals. The second filter is a not very selective active filter, which is integrated, in an RF/IF integrated circuit with the first and second mixer units, the signal shaping means, and certain parts of the synthesizer and the oscillator unit.

摘要翻译： 射频信号频率转换装置为低功率RF接收机的相关级产生中间复合信号（IF）。 为了做到这一点，该装置包括用于滤波由天线拾取的射频信号的第一选择性通带滤波器。 频率合成器产生第一和第二高频信号，其中第一信号的频率高于第二信号的频率。 该合成器从振荡器单元接收参考信号。 第一混频器单元将射频信号与第一信号混合，以产生频率转换的信号。 第二通带滤波器对来自第一混频器单元的信号进行滤波，并向第二混频器单元提供信号以将它们与第二高频信号进行混频。 最后，由第二混频器单元提供的信号的整形装置产生中间信号。 第二滤波器是不是非常有选择的有源滤波器，它被集成在与第一和第二混频器单元的RF / IF集成电路，信号整形装置以及合成器的某些部分和振荡器单元中。