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1. 发明公开

EP1227592A3 Frequency synthesizer and method of generating frequency-divided signal 审中-公开
标题翻译：频率合成器和方法，用于产生分频信号
公开(公告)号：EP1227592A3
公开(公告)日：2004-01-21
申请号：EP02250049.0
申请日：2002-01-04
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Hirano, Shunsuke , Yasunaga, Takeshi , Miyahara, Yasunori
IPC分类号： H03L7/18
CPC分类号： H03B21/02 , H03L7/099 , H03L7/185 , H03L7/1974
摘要： In a frequency synthesizer, a voltage controlled oscillator has a terminal and oscillates a signal whose frequency corresponds to a control signal applied to the terminal. A first frequency divider divides the frequency of the signal outputted from the voltage controlled oscillator so as to output a first frequency-divided signal. The first frequency-divided signal has a divided frequency. A comparator compares a phase of the first frequency-divided signal with that of a reference signal so as to output a difference signal representing a difference between the phase of the first frequency-divided signal and that of the reference signal. A loop filter smoothes the difference signal outputted from the comparator so as to output the smoothed signal as the control signal to the terminal of the voltage controlled oscillator. A frequency division unit divides the frequency of the signal outputted from the voltage control oscillator so as to output a second frequency-divided signal. The second frequency-divided signal has a divided frequency. A mixer unit mixes the second frequency-divided signal outputted from the frequency division unit and the signal outputted from the voltage control oscillator so as to output a mixed signal.

2. 发明公开

EP1227592A2 Frequency synthesizer and method of generating frequency-divided signal 审中-公开
标题翻译：频繁合成器和Verfahren zur Erzeugung eines Frequenzgeteilten信号
公开(公告)号：EP1227592A2
公开(公告)日：2002-07-31
申请号：EP02250049.0
申请日：2002-01-04
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Hirano, Shunsuke , Yasunaga, Takeshi , Miyahara, Yasunori
IPC分类号： H03L7/18
CPC分类号： H03B21/02 , H03L7/099 , H03L7/185 , H03L7/1974
摘要： In a frequency synthesizer, a voltage controlled oscillator has a terminal and oscillates a signal whose frequency corresponds to a control signal applied to the terminal. A first frequency divider divides the frequency of the signal outputted from the voltage controlled oscillator so as to output a first frequency-divided signal. The first frequency-divided signal has a divided frequency. A comparator compares a phase of the first frequency-divided signal with that of a reference signal so as to output a difference signal representing a difference between the phase of the first frequency-divided signal and that of the reference signal. A loop filter smoothes the difference signal outputted from the comparator so as to output the smoothed signal as the control signal to the terminal of the voltage controlled oscillator. A frequency division unit divides the frequency of the signal outputted from the voltage control oscillator so as to output a second frequency-divided signal. The second frequency-divided signal has a divided frequency. A mixer unit mixes the second frequency-divided signal outputted from the frequency division unit and the signal outputted from the voltage control oscillator so as to output a mixed signal.
摘要翻译：在频率合成器中，压控振荡器具有端子并振荡其频率对应于施加到端子的控制信号的信号。第一分频器分压从压控振荡器输出的信号的频率，以输出第一分频信号。第一分频信号具有分频。比较器将第一分频信号的相位与参考信号的相位进行比较，以输出表示第一分频信号的相位与参考信号的相位差之差。环路滤波器平滑从比较器输出的差分信号，以将平滑信号作为控制信号输出到压控振荡器的端子。分频单元将从压控振荡器输出的信号的频率除以输出第二分频信号。第二分频信号具有分频。混频器单元将从分频单元输出的第二分频信号和从压控振荡器输出的信号混合，以输出混合信号。

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