Invention Grant
- Patent Title: Hybrid phase locked loop having wide locking range
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Application No.: US15364167Application Date: 2016-11-29
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Publication No.: US10243572B2Publication Date: 2019-03-26
- 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: Glass & Associates
- Agent Kenneth D'Alessandro; Kenneth Glass
- Priority: IN962/MUM/2015 20150323
- Main IPC: H03L7/00
- IPC: H03L7/00 ; H03L7/10 ; H03L7/087 ; H03L7/093 ; H03L7/099

Abstract:
A digital phased lock loop includes a digital controlled oscillator configured to produce an output signal at an output signal frequency, and a phase comparator configured to compare the output signal or a signal derived from the output signal, with a reference signal at a reference signal frequency or a signal derived from the reference signal to produce a phase error signal. A first loop filter produces a first control signal for the digital controlled oscillator. A frequency error measuring circuit produces a frequency error signal that directly represents a frequency difference between the output signal frequency and the reference signal frequency. 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 providing the combined control signals to the digital controlled oscillator.
Public/Granted literature
- US20170085273A1 HYBRID PHASE LOCKED LOOP HAVING WIDE LOCKING RANGE Public/Granted day:2017-03-23
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