Invention Grant
- Patent Title: Dual-loop phase-locking circuit
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Application No.: US17546662Application Date: 2021-12-09
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Publication No.: US11588488B1Publication Date: 2023-02-21
- Inventor: Gary Ian Moore
- Applicant: Raytheon Company
- Applicant Address: US MA Waltham
- Assignee: Raytheon Company
- Current Assignee: Raytheon Company
- Current Assignee Address: US MA Waltham
- Agency: Schwegman Lundberg & Woessner, P.A.
- Main IPC: H03L7/087
- IPC: H03L7/087 ; H03L7/093 ; H03L7/095 ; H03L7/23 ; H03L7/099

Abstract:
A dual-loop phase-locking circuit combines a conventional phase-frequency-detector (PFD) and frequency-divider based first loop to lock an output signal frequency to a multiple of a reference signal frequency within a first loop bandwidth BW1 with a second loop to simultaneously lock the output signal phase to a second signal independently locked to the same multiple of the reference signal. The second loop integrates the phase error between the output signal and the second signal, and applies an offset at the PFD output in the first loop to reduce the first loop phase errors within a second loop bandwidth BW2 (
Public/Granted literature
- US3174047A Coordinated tape feed and photosensitive sensing mechanism Public/Granted day:1965-03-16
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