Patent ID: 7133654
Filing Date: 2006-11-07
Classification: H04B

Abstract:
1. A communications link receiver, comprising: a data receiver for receiving a communications signal from a communications link; a first circuit for producing a high frequency jitter measurement output proportional to an amount of high frequency jitter of said communications signal, said high frequency jitter measurement output having a component that varies with an amount of low frequency jitter present in said communications signal; a second circuit for producing a low frequency jitter measurement output proportional to an amount of low frequency jitter of said communications signal; and a correction circuit coupled to said high frequency jitter measurement output and said low frequency jitter measurement output for correcting said high frequency jitter measurement output in conformity with said low frequency jitter measurement output to produce a corrected high frequency jitter measurement output, wherein said data receiver comprises a clock/data recovery circuit, and wherein an input of said first circuit and an input of said second circuit are coupled internal signals of said clock and data recovery circuit for providing a measure of jitter of said communications signal.