发明名称 Digitale PLL-Schaltung mit erhöhter Zeitauflösung
摘要 The inventive digital PLL circuit (2) consists of a phase detector (4) which receives an external synchronisation signal (to) and a first feedback signal and produces a phase difference signal. The value of said phase difference signal is a measure of the phase difference between a synchronisation signal (to) and the first feedback signal. The circuit also comprises a DTO (20) which is connected downstream from the phase detector (4), said DTO (20) producing an n-bit wide digital output signal according to the phase difference signal, a feedback device for conveying the output signal of the DTO (20) to the phase detector (4) as a first feedback signal, and a decoding device (14) which is connected to the output of the DTO (20) and which has an output (16) for a correction signal. Said correction signal represents a measure of the phase relation between two scanning values and is derived from at least a subset m of the bits of the second feedback signal. The digital PLL circuit is particularly useful for regenerating horizontal synchronisation in televisions, using the pixel timing.
申请公布号 DE19738914(A1) 申请公布日期 1999.03.18
申请号 DE19971038914 申请日期 1997.09.05
申请人 SIEMENS AG, 80333 MUENCHEN, DE 发明人 ENGLERT, ULRICH, DIPL.-ING., 81549 MUENCHEN, DE;BEINTKEN, HARTMUT, DIPL.-ING., 81541 MUENCHEN, DE;ABLER, MICHAEL, DIP.-ING., 81669 MUENCHEN, DE
分类号 H03L7/081;H03L7/099;H04N5/12;(IPC1-7):H03L7/06;H04L7/033;H04N5/04 主分类号 H03L7/081
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