发明申请
- 专利标题： SPREAD SPECTRUM CONTROL PLL CIRCUIT AND ITS START-UP METHOD
- 专利标题（中）： 传播频谱控制PLL电路及其启动方法
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申请号： US12595008申请日： 2008-03-18
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公开(公告)号： US20100127739A1公开(公告)日： 2010-05-27
- 发明人: Tsuyoshi Ebuchi , Yoshihide Komatsu , Michiyo Yamamoto
- 申请人： Tsuyoshi Ebuchi , Yoshihide Komatsu , Michiyo Yamamoto
- 优先权： JP2007-143261 20070530; JP2007-294371 20071113
- 国际申请： PCT/JP2008/000639 WO 20080318
- 主分类号： H03L7/08
- IPC分类号： H03L7/08
摘要：
A calibration circuit (19) adjusts at least one of one of a charging current of a charge pump circuit (12) and a capacitance value of a filter capacitor in a loop filter circuit (13) and a gain of a voltage controlled oscillator (14), depending on a frequency of a reference clock signal input to a calibration circuit (10).
公开/授权文献
- US07986175B2 Spread spectrum control PLL circuit and its start-up method 公开/授权日：2011-07-26
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