发明名称 |
Circuit arrangement for controlling an oscillator in a colour television receiver or a video recording and/or reproducing apparatus having a phase alternating subcarrier. |
摘要 |
The invention relates to a circuit arrangement for controlling an oscillator. In a first phase-comparator circuit a burst signal whose phase alternates in a predetermined sequence is compared with a first oscillator signal. The output signal generated by the first phase comparator circuit is superimposed on a correction signal generated in a correction circuit, so as to eliminate fluctuations as a result of the phase alternation of the burst signal. The correction circuit is disabled when the magnitude of the phase difference exceeds a specific limit value.
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申请公布号 |
US4758879(A) |
申请公布日期 |
1988.07.19 |
申请号 |
US19870000013 |
申请日期 |
1987.01.02 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
MATTHIES, KARL-HEINZ |
分类号 |
H04N9/45;H03L7/087;H03L7/093;H04N9/44;H04N9/465;H04N9/87;(IPC1-7):H04N9/45 |
主分类号 |
H04N9/45 |
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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