发明名称 |
METHODS, ALGORITHMS, CIRCUITS, AND SYSTEMS FOR DETERMINING A REFERENCE CLOCK FREQUENCY AND/OR LOCKING A LOOP OSCILLATOR |
摘要 |
<p>Apparatuses, methods, systems, algorithms, and circuits for reference clock frequency determination are disclosed. In one embodiment, a circuit for detecting a reference clock frequency can include a clock counter configured to count a number of cycles of the reference clock over a predetermined portion of a sleep clock to provide a reference clock cycle count, where the sleep clock has a known frequency and a predetermined accuracy; a frequency estimator configured to estimate the reference clock frequency from the reference clock cycle count and the known frequency of the sleep clock; and a frequency selector configured to select a closest frequency to the estimated reference clock frequency from a plurality of allowed frequencies.</p> |
申请公布号 |
EP2351223(B1) |
申请公布日期 |
2015.03.25 |
申请号 |
EP20090821190 |
申请日期 |
2009.10.14 |
申请人 |
MARVELL WORLD TRADE LTD. |
发明人 |
YEUNG, KEN;RAINNIE, HEDLEY |
分类号 |
H03L7/06;G06F1/08;G06F1/12;H03L7/08 |
主分类号 |
H03L7/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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