Patent ID: 9191190
Filing Date: 2015-11-17
Classification: H03L,H04B,H04L

Abstract:
1. A method for synchronizing a transmitter portion of a transceiver to a recovered clock generated by a receiver portion of the transceiver, comprising: applying a receiver input signal to a clock and data recovery system in said receiver portion to generate said recovered clock and a frequency offset value, wherein said frequency offset value comprises a digital word indicating an offset between a frequency of a reference clock and a data rate of the receiver input signal; and generating a transmit clock in said transmitter portion that is substantially synchronized to said recovered clock by applying said digital word to a clock signal that comprises a frequency modulator having a frequency offset value input, the frequency modulator comprising an integrator having an input and an output, the input of the integrator being connected to the frequency offset value input, wherein the integrator further comprises an accumulator having a first input, second input, and an output, the first input of the integrator being connected to the frequency offset value input, wherein the integrator further comprises a delay element having an input connected to the accumulator output and an output connect to the second input of the accumulator.