公开(公告)号：US20080125060A1

公开(公告)日：2008-05-29

申请号：US11428597

申请日：2006-07-05

申请人： Jyh-Fong Lin ,  Jung-Chang Liu ,  Peir-Weir Chen ,  Ying-Che Tseng ,  Did-Min Shih

发明人： Jyh-Fong Lin ,  Jung-Chang Liu ,  Peir-Weir Chen ,  Ying-Che Tseng ,  Did-Min Shih

IPC分类号： H04B1/00

CPC分类号： H04B1/0082

摘要： A wireless communication device. The wireless communication device comprises first and second programmable frequency dividers, a mixer, a modulator, a phase detector, and a variable controlled oscillator. The first programmable frequency divider divides the frequency of a reference signal by a factor N to generate a modulating signal. The second programmable frequency divider divides the reference signal by a factor M and outputs a frequency-divided signal. The facts N and M are positive integers. The mixer down-converting a transmission signal according the divided signal and outputs a translation-loop signal. The modulator modulates the modulating signal with baseband signals, and outputs a comparison signal. The phase detector detects a phase difference between the comparison signal and the translation-loop signal. The variable controlled oscillator modifies the transmission signals according to an output of the phase detector.

摘要翻译： 无线通信设备。 无线通信设备包括第一和第二可编程分频器，混频器，调制器，相位检测器和可变控制振荡器。 第一可编程分频器将参考信号的频率除以因子N以产生调制信号。 第二可编程分频器将参考信号除以因子M并输出分频信号。 事实N和M是正整数。 混频器根据分频信号对传输信号进行下变频转换，并输出平移环路信号。 调制器用基带信号调制调制信号，并输出比较信号。 相位检测器检测比较信号和平移环路信号之间的相位差。 可变控制振荡器根据相位检测器的输出修改发送信号。

公开(公告)号：US07146141B2

公开(公告)日：2006-12-05

申请号：US10437988

申请日：2003-05-15

申请人： Peir-Weir Chen

发明人： Peir-Weir Chen

IPC分类号： H04B1/06

CPC分类号： H03G3/3052 ,  H03D3/008 ,  H03F3/45977 ,  H03F2200/294 ,  H03F2200/372 ,  H04B1/30

摘要： A direct conversion receiver with DC offset compensation. The receiver includes an antenna receiving a RF signal, a mixture module converting the RF signal to a baseband signal, a gain amplifier amplifying the baseband signal, an adder subtracting a DC offset current from the baseband signal, a DC offset cancellation circuit obtaining and converting a DC offset value to the DC offset current, a track-and-hold circuit receiving the baseband signal, holding and transferring a DC offset voltage to the DC offset current, and a switching circuit alternatively coupling and decoupling the DC offset cancellation and track-and-hold circuit to receive the baseband signal.

摘要翻译： 具有直流偏移补偿的直接转换接收器。 接收机包括接收RF信号的天线，将RF信号转换为基带信号的混合模块，放大基带信号的增益放大器，从基带信号减去DC偏移电流的加法器，获得和转换的DC偏移消除电路 直流偏移电流的DC偏移值，接收基带信号的跟踪保持电路，保持并将DC偏移电压传送到DC偏移电流;以及开关电路，交替地耦合和去耦合DC偏移消除和跟踪 - 保持电路接收基带信号。