发明名称 |
TIME-DISCRETE PHASE-LOCKED LOOP |
摘要 |
<p>A time-discrete phase-locked loop includes a discrete time oscillator (DTO) which supplies a periodical oscillator signal (OS) representing oscillator values (OV) at corresponding clock instants (TC) of a clock signal (CLK). A position-determining circuit (P) generates a time-discrete synchronization instant (SI) representing a position of an analog synchronizing pulse (SP) of a video signal with sub-clock period accuracy. A phase detector (PD) determines a phase error (PE) between the discrete time oscillator signal (OS) and the synchronization instant (SI) by using the synchronization instant (SI), a value (OV1) of the discrete time oscillator signal (OS) at a clock instant (TC1) related to the synchronization instant (SI), and the slope of the oscillator signal (OS). A period of the oscillator signal (OS) depends on the phase error (PE). By using the slope of the oscillator signal (OS), the phase error (PE) is independent of this slope.</p> |
申请公布号 |
EP0962053(B1) |
申请公布日期 |
2003.05.21 |
申请号 |
EP19980957083 |
申请日期 |
1998.12.14 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
STESSEN, JEROEN, H., C., J.;VAN DALFSEN, AGE, J. |
分类号 |
H04N5/06;G09G1/00;H03L7/091;H03L7/099;(IPC1-7):H03L7/091 |
主分类号 |
H04N5/06 |
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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