公开(公告)号：US07315216B2

公开(公告)日：2008-01-01

申请号：US11408040

申请日：2006-04-21

申请人： Chih-Wei Yang ,  Chien-Hsun Lee ,  Hsiang-Sheng Liu ,  Juh-Gua Shiau

发明人： Chih-Wei Yang ,  Chien-Hsun Lee ,  Hsiang-Sheng Liu ,  Juh-Gua Shiau

IPC分类号： H03D3/24 ,  H03L7/085 ,  H03L7/033

CPC分类号： H03L7/0812 ,  H03L7/07 ,  H03L7/085 ,  H03L7/093

摘要： An adjusting frequency device of built-in oscillator for USB interface and a method thereof are described. It is Auto detect the error of bit-rate between the USB host and the USB device, and produce tiny counting time for clocking the clock error between the USB host and the USB device by a delay lock loop. The clock error after quantification, digitization and operation outputting a quantitative code, then the oscillator adjusts the oscillation frequency according to the quantitative code. Whereby adjusting the oscillation frequency of the USB device and the frequency of the USB host to less than 1% clock error for ensuring the accuracy of data transmission.

摘要翻译： 描述了用于USB接口的内置振荡器的调整频率装置及其方法。 它是自动检测USB主机和USB设备之间比特率的错误，并产生微小的计数时间，通过延迟锁定环来计时USB主机和USB设备之间的时钟错误。 量化后的时钟误差，数字化和运算输出定量代码，然后振荡器根据定量代码调整振荡频率。 通过将USB设备的振荡频率和USB主机的频率调整到小于1％的时钟误差，以确保数据传输的准确性。