- 专利标题: ADJUSTABLE FREQUENCY DELAY-LOCKED LOOP
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申请号: EP05725604.2申请日: 2005-03-14
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公开(公告)号: EP1751867B1公开(公告)日: 2018-07-04
- 发明人: WILHITE, Jeffrey B., , CHARASKA, Joseph A., , GABATO, Manuel P., Jr. , GAILUS, Paul H., , STENGEL, Robert E.,
- 申请人: Motorola Solutions, Inc.
- 申请人地址: 500 W. Monroe Street 43rd Floor Chicago, IL 60661 US
- 专利权人: Motorola Solutions, Inc.
- 当前专利权人: Motorola Solutions, Inc.
- 当前专利权人地址: 500 W. Monroe Street 43rd Floor Chicago, IL 60661 US
- 代理机构: Treleven, Colin
- 优先权: US830337 20040422
- 国际公布: WO2005109647 20051117
- 主分类号: H03K5/133
- IPC分类号: H03K5/133 ; H03L7/081 ; H03L7/16 ; H03L7/189 ; H03J7/06 ; H03L7/099 ; H03K5/00
摘要:
A delay-locked loop 300 that includes: an adjustable frequency source ( 320 ) for generating a clock signal ( 322 ) having an adjustable frequency; an adjustment and tap selection controller ( 310 ) for determining a first frequency as a function of a second frequency and for causing the frequency source to adjust the frequency of the clock signal to substantially the first frequency, the second frequency being the desired frequency of a first output signal; a delay line ( 330 ) configured to receive the clock signal for generating a plurality of phase-shifted clock signals; and a first selection circuit ( 370 ) for receiving the plurality of phase-shifted clock signals and for selecting, one at a time and under the control of the adjustment and tap selection controller, a first sequence of the phase-shifted clock signals for generating the first output signal having substantially the second frequency.
公开/授权文献
- EP1751867A2 ADJUSTABLE FREQUENCY DELAY-LOCKED LOOP 公开/授权日:2007-02-14
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