Invention Grant
- Patent Title: Phase-locked loop slip detector
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Application No.: US17458001Application Date: 2021-08-26
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Publication No.: US11444626B2Publication Date: 2022-09-13
- Inventor: Shailesh Ganapat Ghotgalkar , Wei Fu , Venkatseema Das , Jiankun Hu
- Applicant: TEXAS INSTRUMENTS INCORPORATED
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent Krista Y. Chan; Charles A. Brill; Frank D. Cimino
- Main IPC: H03L7/089
- IPC: H03L7/089 ; H03L7/095 ; H03L7/087

Abstract:
A phase-locked loop (PLL) includes a phase-frequency detector (PFD) having a first PFD input, a second PFD input, and a PFD output. The PFD is configured to generate a first signal on the PFD output. The first signal comprises pulses having pulse widths indicative of a phase difference between signals on the first and second PFD inputs. A low pass filter (LPF) has an LPF input and an LPF output. The LPF input is coupled to the PFD output. A flip-flop has a clock input and a flip-flop output. The clock input is coupled to the LPF output. A lock-slip control circuit is coupled to the flip-flop output and to the first PFD input. The lock-slip control circuit is configured to determine phase-lock and phase-slip based at least in part on a signal on the flip-flop output.
Public/Granted literature
- US20210384913A1 PHASE-LOCKED LOOP SLIP DETECTOR Public/Granted day:2021-12-09
Information query
IPC分类: