| 摘要 |
PURPOSE:To provide a clock supply system which reduces the constitutive scale of a system and a device in a system for establishing synchronous networks. CONSTITUTION:In a main device 50, a reference clock signal provided with a redundant system is received, and one reference clock signal is selected by first and second selective circuits 12 and 22 in the control of a system selection circuit 4. The respectively selected reference clock signals are newly regenerated by first and second reference signal generation circuits 14 and 24 and sent to a slave device 51. The reference clocks provided with regenerated redundant systems are respectively received, the reference clock signals of systems is use are respectively selected by first and second reference signal reproducing circuits 33 and 43, and an in-device reference signal is generated. Therefore, in the case of the system for synchronous networks with plural devices, the number of clock supply devices and system selection circuits can be reduced. |
