Digital circuit for correcting phase shift of digital signal
 A GPS receiver comprises a phase-error derivation circuit which derives the average phase error over a predetermined period. The phase-error derivation circuit sends an average phase difference signal to a numerically controlled oscillator to control its clock rate. Deriving the average phase error over the predetermined period makes it possible to determine accurately the phase error between the Gold code sequence from the satellite and the Gold code sequence derived by the local Gold code generator. 
Sony Corporation
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G01S G01S G01S
inventional additional inventional
Katsuya Masahiro
Hori Fujita