发明申请
- 专利标题： LOW PASS FILTER AND LOCK DETECTOR CIRCUIT
- 专利标题（中）： 低通滤波器和锁定检测电路
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申请号： US12344552申请日： 2008-12-28
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公开(公告)号： US20090168944A1公开(公告)日： 2009-07-02
- 发明人: Taek-Sang Song , Kyung-Hoon Kim , Dae-Han Kwon , Dae-Kun Yoon
- 申请人： Taek-Sang Song , Kyung-Hoon Kim , Dae-Han Kwon , Dae-Kun Yoon
- 申请人地址： KR Gyeonggi-do
- 专利权人： HYNIX SEMICONDUCTOR, INC.
- 当前专利权人： HYNIX SEMICONDUCTOR, INC.
- 当前专利权人地址： KR Gyeonggi-do
- 优先权： KR10-2007-0140412 20071228
- 主分类号： H03D3/24
- IPC分类号： H03D3/24
摘要：
A low pass filter includes a driver unit configured to output a voltage proportional to an input pulse width, a charge/discharge unit configured to charge the output voltage of the driver unit, a comparator unit configured to compare an output voltage of the charge/discharge unit with a reference value to output a square wave signal, and a switching unit configured to switch the charge/discharge unit to an operation state, based on a bandwidth expansion signal.
公开/授权文献
- US07876148B2 Low pass filter and lock detector circuit 公开/授权日：2011-01-25