发明申请
- 专利标题: Phase locked loop and method for phase correction of a frequency controllable oscillator
- 专利标题(中): 锁相环和频率可控振荡器相位校正方法
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申请号: US11086039申请日: 2005-03-22
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公开(公告)号: US20060082417A1公开(公告)日: 2006-04-20
- 发明人: Burkhard Neurauter , Gunter Marzinger , Christian Munker , Roland Vuketich
- 申请人: Burkhard Neurauter , Gunter Marzinger , Christian Munker , Roland Vuketich
- 优先权: DE102004014204.1 20040323
- 主分类号: H03L7/00
- IPC分类号: H03L7/00
摘要:
A phase locked loop is disclosed and includes a frequency divider circuit with a settable division ratio in a feedback path. The division ratio is produced using a control circuit which, besides an input for supplying the integer and fractional components for the frequency division ratio which is to be set, includes an input for supplying a phase correction signal. To produce the phase correction signal, the phase locked loop further includes a phase correction apparatus. The phase correction signal preferably contains a signal component with an exponential profile, and is supplied to the control circuit for producing a frequency division ratio for the frequency divider circuit such that it compensates for a phase drift in the output signal from the voltage controlled oscillator in the phase locked loop.