发明申请
- 专利标题： Frequency-locking device and frequency-locking method thereof
- 专利标题（中）： 频率锁定装置及其频率锁定方法
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申请号： US11706199申请日： 2007-02-15
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公开(公告)号： US20080100388A1公开(公告)日： 2008-05-01
- 发明人: Yong Jheng Lin , Wen Hsiang Huang , Min-Yi Chen
- 申请人： Yong Jheng Lin , Wen Hsiang Huang , Min-Yi Chen
- 专利权人： SONIX Technology Co., Ltd.
- 当前专利权人： SONIX Technology Co., Ltd.
- 优先权： TW095140350 20061101
- 主分类号： H03L7/099
- IPC分类号： H03L7/099 ; G06F13/00
摘要：
A frequency-locking device including a digitally-controlled oscillator (DCO) and a comparing unit is disclosed. The DCO is used for generating an output frequency signal. The comparing unit receives a Keep Alive signal from a universal serial bus (USB) and the output frequency signal, and compares the Keep Alive signal with the output frequency signal to generate a calibration signal. Then, the DCO adjusts the frequency of the output frequency signal according to the calibration signal to meet the USB specification for data communication.
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