Invention Grant
- Patent Title: Hybrid phase locked loop having wide locking range
- Patent Title (中): 混合锁相环具有宽锁定范围
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Application No.: US15047778Application Date: 2016-02-19
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Publication No.: US09515669B2Publication Date: 2016-12-06
- Inventor: Prakash Reddy
- Applicant: Microsemi SoC Corporation
- Applicant Address: US CA San Jose
- Assignee: Microsemi SoC Corporation
- Current Assignee: Microsemi SoC Corporation
- Current Assignee Address: US CA San Jose
- Agency: Leech Tishman Fuscaldo & Lampl
- Agent Kenneth D'Alessandro, Esq.
- Priority: IN962/MUM/2015 20150323
- Main IPC: H03L7/06
- IPC: H03L7/06 ; H03L7/10 ; H03L7/099 ; H03L7/087

Abstract:
A digital phased lock loop includes a digital controlled oscillator configured to produce an output signal at a frequency. A phase comparator compares the output signal, or a signal derived therefrom, with a reference signal to produce a phase error signal. A first loop filter produces a first control signal for the digital controlled oscillator from an output of the phase comparator. A frequency error measuring circuit coupled to the output of the phase comparator produces a frequency error signal. A second loop filter produces a second control signal for the digital controlled oscillator from an output of the frequency error measuring circuit. A circuit combines the first and second control signals and provides the combined control signals to the digital controlled oscillator.
Public/Granted literature
- US20160285467A1 HYBRID PHASE LOCKED LOOP HAVING WIDE LOCKING RANGE Public/Granted day:2016-09-29
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