Patent ID: 6310498
Filing Date: 2001-10-30
Classification: H03K,H03L,H04L

Abstract:
Apparatus comprising:a voltage responsive circuit for producing X different clock signals, where X is an integer greater than one (1), each one of said X clock signals having the same frequency and a different phase;means for applying a control voltage to the voltage responsive means, with the phase of each one of the X clock signals varying as a function of an amplitude of the control voltage applied to the voltage responsive circuit;circuitry, including a phase comparator responsive to an incoming data signal and to a predetermined one of said X clock signals for producing at an output of said phase comparator a control signal and said circuitry including a multiplexer being responsive to said control signal for selecting one of the X clock signals; andwherein said means for applying a control voltage includes comparator circuitry for comparing the selected one of the X clock signals with a reference frequency signal for varying the amplitude of the control voltage applied to the voltage responsive circuit.