Invention Grant
- Patent Title: Oversampling CDR which compensates frequency difference without elasticity buffer
-
Application No.: US15009696Application Date: 2016-01-28
-
Publication No.: US09705665B2Publication Date: 2017-07-11
- Inventor: Abhishek Chowdhary , Vivek Uppal , Alok Kaushik , Sajal Kumar Mandal , Tapas Nandy , Sanjeev Chopra
- Applicant: STMicroelectronics International N.V.
- Applicant Address: NL Amsterdam
- Assignee: STMicroelectronics International N.V.
- Current Assignee: STMicroelectronics International N.V.
- Current Assignee Address: NL Amsterdam
- Agency: Seed Intellectual Property Law Group LLP
- Main IPC: H04L12/26
- IPC: H04L12/26 ; H04L7/033 ; H04L7/00 ; H03L7/08 ; H04L25/03 ; H03L7/091

Abstract:
A method, algorithm, architecture, circuit and/or system that compensates for frequency difference in oversampled CDRs. The oversampled CDR uses a programmable divider whose division ratio is changed, for one or more cycles, from its usual division ratio, when accumulated phase movement in either direction exceeds a threshold. Accordingly, the elasticity buffer in oversampled CDRs can be made much smaller or entirely eliminated, resulting in less area, and reduced or eliminated dependence of max allowed burst size on ppm difference. The threshold can be kept programmable, and more than half unit interval, to provide robustness towards high frequency jitter.
Public/Granted literature
- US20160149695A1 OVERSAMPLING CDR WHICH COMPENSATES FREQUENCY DIFFERENCE WITHOUT ELASTICITY BUFFER Public/Granted day:2016-05-26
Information query