发明授权
- 专利标题: Charge pump circuit for a PLL
- 专利标题(中): PLL的电荷泵电路
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申请号: US10438178申请日: 2003-05-13
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公开(公告)号: US06952126B2公开(公告)日: 2005-10-04
- 发明人: Sang Jin Byun , Beomsup Kim , Chan-Hong Park
- 申请人: Sang Jin Byun , Beomsup Kim , Chan-Hong Park
- 申请人地址: US CA Campbell
- 专利权人: Berkana Wireless, Inc.
- 当前专利权人: Berkana Wireless, Inc.
- 当前专利权人地址: US CA Campbell
- 代理机构: Van Pelt, Yi & James LLP
- 优先权: KR10-2001-00610465 20010929
- 主分类号: H03L7/089
- IPC分类号: H03L7/089 ; H03L7/06
摘要:
A technique is disclosed for providing a charge pump circuit for phase locked loop (PLL) to reduce mismatch of up/down currents and feed-through of up/down currents to voltage output. Elimination of feed-through of the input signal may be achieved by using differential switches (M1 and M2, and M3 and M4) based on DC reference voltage in the charge pump and also eliminate the mismatch of up/down currents in a wide voltage output range by applying a new replica biasing using feedback.
公开/授权文献
- US20040004500A1 Charge pump circuit for a PLL 公开/授权日:2004-01-08