Invention Grant
- Patent Title: Clock and data recovery device and phase control method
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Application No.: US16137500Application Date: 2018-09-20
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Publication No.: US10367634B1Publication Date: 2019-07-30
- Inventor: Po-Shing Yu
- Applicant: GLOBAL UNICHIP CORPORATION , TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Applicant Address: TW Hsinchu TW Hsinchu
- Assignee: GLOBAL UNICHIP CORPORATION,TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Current Assignee: GLOBAL UNICHIP CORPORATION,TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Current Assignee Address: TW Hsinchu TW Hsinchu
- Agency: CKC & Partners Co., LLC
- Priority: TW107120572A 20180614
- Main IPC: H04L25/03
- IPC: H04L25/03 ; H04L7/00 ; H03L7/08 ; H03L7/091

Abstract:
A clock and data recovery device includes a data analysis circuitry, a loop filter circuitry, a phase rotator circuitry, a multiplexer circuitry, and a phase interpolator circuitry. The data analysis circuitry analyzes input data according to a first clock signal and a second clock signal to generate an error signal. The loop filter circuitry updates an adjustment signal according to the error signal. The phase rotator circuitry adjusts rotation signals according to the adjustment signal and limit values if the adjustment signal is updated. The multiplexer circuitry outputs one of the rotation signals as a phase control signal according to third clock signals. The phase interpolator circuitry adjusts the first and the second clock signals according to the phase control signal and fourth clock signals.
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