Clock supplying system专利检索- 产生用作定时标准的预选的时间间隔的仪器专利检索查询-专利查询网

Clock supplying system
申请号	JP671180	申请日	1980-01-22	公开(公告)号	JPS56103386A	公开(公告)日	1981-08-18
申请人	Mitsubishi Electric Corp;			发明人	SHIYUUTOU SEIJI;
摘要	PURPOSE:To enable one unit of clock system to be changed over to other clock system immediately when the former goes out of order by doubling the clock systems, supplying clocks simultaneously and concentrically and mutually monitoring these. CONSTITUTION:Normally, the clock CL is supplied to a system from the 1st clock system 13. When a trouble occurs in the oscillation circuit 1 in the 1st clock system 13 or in the associated parts such as a frequency dividing circuit 2 and AND circuit 7, this is detected with the 2nd monitoring circuit 4 or the 1st monitoring circuit 3, and the automatic selecting circuit 5 and the 1st AND circuit 7 in the 2nd clock system 14 are operated, so that the clock CL is supplied from the 2nd clock system 14 to the system and at the same time an alarm signal ANN is emitted from a timer 6. Further when the 2nd clock system 12 goes out of order as well, the supply of the clock to the system is stopped and the alarm signal ANN is emitted from a timer 16.
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