Title:
【発明の名称】警報転送回路
Document Type and Number:
Japanese Patent JP3070546
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a new alarm transfer circuit capable of easily transferring alarm at the time of a fault occurrence without lowering transmission efficiency of a signal and without enlarging a circuit scale. SOLUTION: This circuit is provided with a storage circuit 11 for converting speed for constructing a frame between radio sections, a PLL circuit 12 for generating a clock signal after speed conversion synchronizing with an input clock signal, a timing generation circuit 13, a data fixing circuit 14 for fixing an input signal to the storage circuit 11 to a predetermined data signal by the detection result of clock disconnection, a clock signal disconnection detection circuit 15 for detecting signal disconnection of the input clock signal, and a clock selection circuit 16 for switching a clock signal to be outputted to the data fixing circuit 14, the storage circuit 11 and the PLL circuit 12 from the input clock signal to an output signal of the timing generation circuit by this detection result.
Inventors:
Naoto Kubo
Application Number:
JP29123897A
Publication Date:
July 31, 2000
Filing Date:
October 23, 1997
Export Citation:
Assignee:
NEC
International Classes:
H04J3/14; H04L69/40; (IPC1-7): H04L29/14; H04J3/14
Domestic Patent References:
| JP3226036A | ||||
| JP7143092A | ||||
| JP7264212A |
Attorney, Agent or Firm:
Yutaro Kumagai