Invention Grant
- Patent Title: Low jitter clock recovery circuit
- Patent Title (中): 低抖动时钟恢复电路
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Application No.: US13897267Application Date: 2013-05-17
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Publication No.: US08903031B2Publication Date: 2014-12-02
- Inventor: Carl W. Werner
- Applicant: Rambus Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: Rambus Inc.
- Current Assignee: Rambus Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Peninsula Patent Group
- Agent Lance Kreisman
- Main IPC: H03D3/24
- IPC: H03D3/24 ; H03L7/091 ; H03L7/07 ; H04L7/033 ; H03L7/081 ; H03D13/00 ; H03L7/087 ; H03L7/089

Abstract:
A clock recovery circuit includes a first phase detector for measuring the phase difference between a first clock signal from a voltage controlled oscillator (VCO) and a data signal. A phase shifter responsive to a control signal based on this phase difference adjusts the phase of an incoming clock signal to yield a second clock signal. The phase difference between the first clock signal and the second clock signal is measured and the resulting signal is low-pass filtered to derive a control signal for controlling the VCO. The phase locked loop including the VCO filters out jitter.
Public/Granted literature
- US20130251084A1 LOW JITTER CLOCK RECOVERY CIRCUIT Public/Granted day:2013-09-26
Information query
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