Patent ID: 6693985
Filing Date: 2004-02-17
Classification: H03L,H04L

Abstract:
An apparatus for recovering a data signal from a received signal, comprising:N sampling circuits which each samples the received signal periodically with a unique phase; a sampling clock generating circuit coupled to the N sampling circuits, wherein the sampling clock generating circuit generates a sampling clock signal with the unique phase for ea of the N sampling circuits; a clock divider circuit coupled to the sampling clock generating circuit, wherein the clock divider circuit supplies N*X clock signals to the sampling clock generating circuit, the N*X clock signals having N*X unique phases separated by substantially equal phase increments totaling 360 degrees; and a switching signal generating circuit coupled to the N sampling circuits and to the sampling clock generating circuit to, determine whether the N sampling circuits are sufficiently in phase with the received signal; and generate a control signal to shift phases of the N sampling circuits to cause the N sampling circuits to be sufficiently in phase with the received signal, such that an effective sampling resolution is N*X and an actual sampling resolution is N.