| 发明名称 |
Synchronization circuit |
| 摘要 |
A synchronization circuit receives an external clock input. The circuit includes an internal oscillator; a clock detection circuit, coupled to the external clock input, for determining whether a clock signal at the external clock input is valid; circuitry for keeping the frequency of the internal oscillator constant until the clock detection circuit determines that an external clock signal is valid; and circuitry for switching the output of the synchronization circuit from the internal oscillator to the external clock input when the clock detection circuit determines than an external clock signal is valid. |
| 申请公布号 |
US9292038(B1) |
申请公布日期 |
2016.03.22 |
| 申请号 |
US201414531685 |
申请日期 |
2014.11.03 |
| 申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
Ozalevli Erhan |
| 分类号 |
G06F1/04;G06F1/12 |
主分类号 |
G06F1/04 |
| 代理机构 |
|
代理人 |
Kempler William B.;Cimino Frank D. |
| 主权项 |
1. A synchronization circuit having an output, the synchronization circuit comprising:
an external clock input; an internal oscillator; a clock detection circuit, coupled to the external clock input, determining whether a clock signal at the external clock input is valid; circuitry keeping the frequency of the internal oscillator constant until the clock detection circuit determines that an external clock signal is valid; and circuitry switching the output of the synchronization circuit from the internal oscillator to the external clock input when the clock detection circuit determines than an external clock signal is valid. |
| 地址 |
Dallas TX US |
