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<p>resonance frequency due to tip-surface interactions<br/>
* <a href="page.php?w=DC_motor">DC motor</a> <a href="page.php?w=motor_controller">drive</a></p>

<p><big>Clock recovery</big></p>
<p>Some data streams, especially high-speed serial data streams (such as the raw stream of data from the magnetic head of a disk drive), are sent without an accompanying clock. The receiver generates a clock from an approximate frequency reference, and then uses a PLL to phase-align it to the data stream's <a href="page.php?w=signal_edge">signal edge</a>s. This process</p><p>
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