Invention Grant
- Patent Title: Clock recovery circuit, related clock and data recovery circuit, receiver, integrated circuit and method
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Application No.: US15190020Application Date: 2016-06-22
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Publication No.: US09866223B2Publication Date: 2018-01-09
- Inventor: Jesus Alejandro Guinea Trigo
- Applicant: STMicroelectronics S.r.l.
- Applicant Address: IT Agrate Brianza
- Assignee: STMICROELECTRONICS S.R.L.
- Current Assignee: STMICROELECTRONICS S.R.L.
- Current Assignee Address: IT Agrate Brianza
- Agency: Seed IP Law Group LLP
- Priority: IT102015000080928 20151207
- Main IPC: H04L7/00
- IPC: H04L7/00 ; H03D3/24 ; H03L7/08 ; H03L7/087 ; H03L7/14 ; H04L7/033 ; H03L7/089 ; H03L7/093 ; H03L7/113

Abstract:
A clock recovery circuit includes an oscillator to generate a clock signal. The oscillator varies a frequency of the clock signal as a function of a control signal. The clock recovery circuit has a phase tracking control loop to determine the phase error between the reference signal and the clock signal, and vary the control signal as a function of the phase error. The phase tracking control loop has a linear region for phase errors in the range between −π and +π, thereby creating a cycle slippage event when the phase error exceed said range. The clock recovery circuit includes a cycle-slippage detector which determines whether the phase error reaches or approaches +π or −π. In case the phase error reaches or approaches +π or −π, the cycle-slippage detector acts on the control signal in an effort to avoid that said phase tracking control loop leaves said linear region.
Public/Granted literature
- US20170163267A1 CLOCK RECOVERY CIRCUIT, RELATED CLOCK AND DATA RECOVERY CIRCUIT, RECEIVER, INTEGRATED CIRCUIT AND METHOD Public/Granted day:2017-06-08
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