Invention Grant
US07567644B2 Phase-lock loop, method for frequency switching in a phase-lock loop, and use of said phase-lock loop
有权
锁相环,锁相环中的频率切换方法以及所述锁相环的使用
- Patent Title: Phase-lock loop, method for frequency switching in a phase-lock loop, and use of said phase-lock loop
- Patent Title (中): 锁相环,锁相环中的频率切换方法以及所述锁相环的使用
-
Application No.: US11514521Application Date: 2006-09-01
-
Publication No.: US07567644B2Publication Date: 2009-07-28
- Inventor: Elmar Wagner
- Applicant: Elmar Wagner
- Applicant Address: DE Munich
- Assignee: Infineon Technologies AG
- Current Assignee: Infineon Technologies AG
- Current Assignee Address: DE Munich
- Agency: Eschweiler & Associates, LLC
- Priority: DE102004010365 20040303
- Main IPC: H03D3/24
- IPC: H03D3/24 ; H04L7/00

Abstract:
The invention relates to a phase comparison circuit including a reference input and a feedback input, and an output provided with a controlled oscillator which is connected thereto. A frequency divider with an adjustable division ratio resides in the feedback path of the phase-lock loop. The phase-lock loop includes a frequency adjusting arrangement having a first and a second control input, a first output which is connected to the frequency divider and is used to generate a digital regulating signal, and a second output which is coupled to the controlled oscillator and is used to generate an analog control signal. The first control input is embodied in such a way as to adjust a frequency of the phase-lock loop, and the second control input is embodied in such a way as to switch the frequency of the phase-lock loop according to a frequency offset. The phase-lock loop can advantageously be used to compensate frequency offsets of received signals.
Public/Granted literature
- US20070060090A1 Phase-lock loop, method for frequency switching in a phase-lock loop, and use of said phase-lock loop Public/Granted day:2007-03-15
Information query
IPC分类: