Patent ID: 6831491
Filing Date: 2004-12-14
Classification: H03C,H03L,H04L

Abstract:
A device that is operable to provide a corrected phase output signal, said device comprising:a first phase detector that generates a first phase signal; a phase locked loop (PLL) that generates an oscillator signal that is related to a tuning signal, wherein said PLL comprises (i) a second phase detector that generates a second phase signal that is indicative of a phase difference between said oscillator signal and (ii) an input signal and a filter that filters said second phase signal to generate said tuning signal; and a phase modulator that receives said oscillator signal and said first phase signal that is indicative of a phase difference between said oscillator signal and said input signal, wherein said phase modulator generates said corrected phase output signal by adding, to said oscillator signal, an amount of phase modulation that is approximately equal and opposite to said phase difference between said oscillator signal and said input signal.