Patent ID: 8040193
Filing Date: 2011-10-18
Classification: H03L

Abstract:
1. An oscillation adjusting circuit, comprising: an oscillator producing an output signal having a first period; a timing comparator receiving the output signal and an input data stream with a known time interval, producing a feedback signal with a first duration according to the known time interval and the first period, producing a first error signal representing a difference between the known time interval and the first duration, and counting a predetermined multiple of the first period to produce a reference error signal having a reference error time interval by being triggered by the first error signal, wherein the known time interval is associated with a period between a first occurrence of and a second occurrence of a predetermined bit pattern in the input data stream; and an error processing circuit receiving the first error signal and the reference error signal and producing a control signal adjusting the first period according to the first error signal and the reference error signal.