Patent ID: 7551702
Filing Date: 2009-06-23
Classification: G06F,H04J,H04L

Abstract:
1. A method of operating a function unit to obtain data from a data pulse signal, said method comprising the steps: a) receiving, into said function unit, said data pulse signal (DS) including data pulses at a first clock frequency; b) generating, in said function unit, a local oscillator signal having clock pulses at a second clock frequency; c) providing a first pulse count ratio; d) interrogating at least one of said data pulses respectively at an interrogation time determined from a number of said clock pulses dependent on said first pulse count ratio; e) counting said clock pulses of said local oscillator signal occurring in time between two predetermined pulse flanks of said data pulses of said data pulse signal to provide an actual pulse count (N); f) dividing said actual pulse count (N) by 2 to provide a second pulse count ratio; g) comparing said first pulse count ratio with said second pulse count ratio to provide a comparison result; and h) updating a present value of said first pulse count ratio to an updated value of said first pulse count ratio in response to and dependent on said comparison result.