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Phase locking circuit

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专利汇可以提供Phase locking circuit专利检索,专利查询,专利分析的服务。并且PURPOSE: To avoid the generation of undesired sweep signal component when the sweep is stopped, by keeping the sweep signal at a level obtained immediately before phase locking when the sweep is stopped by pull-in of a phase locking loop.
CONSTITUTION: A deciding signal (b) is supplied to a terminal A of a selecting circuit 11 from a base band processing circuit 4, and an output signal (d) of an output terminal X is supplied to a terminal B of the circuit 11 respectively. When the signal (b) is set at 1, a sweep signal (a) of the output of a sweep oscillator 8 is delivered. Then 0 and 1 are delivered when the signal (d) is set at 0 and 1 respectively with the signal (b) set at 0. Therefore when the signal (b) is set at 0 with the signal (a) set at 1, the signal (d) is kept at 1. Then a signal (c) of the output of a capacitor 9 generates no excessive sweep signal component. Thus a locking state can be maintained although a non-locking state is changed to a locking state with discontinuation of sweep when the signal (a) is set at 1 since the signal (d) is kept at 1.
COPYRIGHT: (C)1983,JPO&Japio,下面是Phase locking circuit专利的具体信息内容。

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