发明名称 |
CURRENT AVERAGING DATA SEPARATOR |
摘要 |
A data separator for use in synchronizing data derived from a floppy disk or similar data source provides a variable net gain or loss of charge to vary the frequency of a voltage-controlled oscillator in accordance with the relative position of the data with respect to the clock until data centering or synchronization is achieved. The net charge is derived from a charge pump circuit that is controlled by a charge pump-up signal whose duration is proportional to the detected phase difference between the data and the clock, and a charge pump-down signal whose duration is one clock cycle. When the data pulse is centered within a clock cycle, the duration of a pump-up signal is one half that of a pump-down signal.
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申请公布号 |
CA2041867(C) |
申请公布日期 |
1994.04.05 |
申请号 |
CA19912041867 |
申请日期 |
1991.05.06 |
申请人 |
STANDARD MICROSYSTEMS CORPORATION |
发明人 |
WAHLER, RICHARD;SCHOOLEY, CARL;GROSS, ROBERT |
分类号 |
G11B20/14;H03L7/089;H03L7/14;H03L7/199;H03M7/40;H04L7/033;(IPC1-7):G06F1/04;G11B20/10 |
主分类号 |
G11B20/14 |
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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