Patent ID: 7693243
Filing Date: 2010-04-06
Classification: H04L

Abstract:
1. A timing recovery circuit, comprising: a converter converting an in put signal to sample data with a sampling signal; a timing recovery controller coupled to the converter and determining the sampling signal; and an initial phase generator, coupled to the converter, for detecting a change with the sample data only, producing an initial phase based on the change, and controlling the sampling signal, comprising: a change detection circuit, coupled to the converter, for detecting the change in two of the sample data; a decision circuit, coupled to the change detection circuit, for producing the initial phase based on the change; a recording circuit, coupled to the change detection circuit and the decision circuit, for recording a change information of the change, wherein the change information comprises a time position of the change in a time frame, and the recording circuit further sums sample data at the time position as decision data for the decision circuit to produce the initial phase, wherein the decision circuit further determines a minimum decision data among all the decision data, and produces the initial phase based thereon; and a counter, coupled to the change detection circuit and the decision circuit, for counting the change as a change count, and enabling the decision circuit upon the change count meeting a target count.