发明授权
- 专利标题: High-performance charge pump for self-biased phase-locked loop
- 专利标题(中): 用于自偏置锁相环的高性能电荷泵
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申请号: US10330556申请日: 2002-12-30
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公开(公告)号: US06894569B2公开(公告)日: 2005-05-17
- 发明人: Eyal Fayneh , Ernest Knoll
- 申请人: Eyal Fayneh , Ernest Knoll
- 申请人地址: US CA Santa Clara
- 专利权人: Intel Corporation
- 当前专利权人: Intel Corporation
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Fleshner & Kim, LLP
- 主分类号: H03B5/32
- IPC分类号: H03B5/32 ; H03L7/00 ; H03L7/089 ; H03L7/18
摘要:
A charge pump includes a charge circuit switch, a pump circuit switch, and a controller for generating a first control signal for switching the charge circuit switch and a second control signal for switching the pump circuit. In order to reduce the effects of self-jitter and improve signal quality, the controller generates the first and second control signals so that they have a same amplitude and slew rate. This results in improving steady-state phase error (DC skew). To further improve performance, current sources of the charge pump are controlled to operate continuously. This advantageously minimizes parastic switching currents. The charge pump may be incorporated within a phase-locked loop for purposes of generating frequency signals. The phase-locked loop may be self-biased. A processing system having, for example, a microprocessor-based computing architecture may advantageously include the phase-locked loop for performing any one of a variety of applications.
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