Patent ID: 7315216
Filing Date: 2008-01-01
Classification: H03L

Abstract:
1. An adjusting frequency device of built-in oscillator for USB interface, comprising: a delay lock loop (DLL), which provides a reference signal of a time sector; an error compare module, which receives a USB reference signal and a feedback signal, and outputs a quantitative value according to the reference signal of the time sector; a computation module, which computes the quantitative value, and converts the obtained quantitative value into a quantitative code; an oscillator, which adjusts the oscillation frequency of the oscillator based on the quantitative code; a first frequency divider, which performs frequency division on the oscillation frequency of the oscillator, then outputs the feedback signal to the error compare module; and a second frequency divider, which performs frequency division on the oscillation frequency of the oscillator, then provides a frequency-adjusted output signal.