Patent ID: 7283000
Filing Date: 2007-10-16
Classification: H03L,H04L

Abstract:
1. An auto-adjusting high accuracy oscillator, comprising: a frequency comparator, for comparing a synchronization signal obtained from a USB host with an oscillation signal obtain from a device so as to obtain a frequency difference between the two; a control tuning circuit, further comprising a counter and an adder/sub circuit, for receiving the frequency difference received form the frequency comparator and using the same as an adjusting reference; and an oscillating element; wherein, a variation is obtained by the counting of the counter while transmitting the variation and the adjusting reference to the adder/sub circuit to be encoded thereby into a digital code so as to enable the oscillating element to perform a frequency up/down operation according to the digital code, and thus enable the frequency of the oscillation signal to approach that of the synchronization signal successively.