Alarm detecting system for redundancy configuration circuit

Details Alarm detecting system for redundancy configuration circuit Alarm detecting system for redundancy configuration circuit

1993-01-25

1996-09-03

Peng, John K.

Communications: electrical

Condition responsive indicating system

With particular system function

340527, 340507, 364187, G08B 2916

Patent

active

055527647

ABSTRACT:
In a receiving circuit which serves as a system in use, a gate circuit is enabled in response to a specifying signal. In a receiving circuit which serves as a backup system, a gate circuit is enabled in response to a specifying signal. When no signal is applied to an input terminal, alarm detection signals are outputted. However, a system-in-use/backup-system specifying circuit is first supplied with the alarm detection signal of the backup system. Thus, the system-in-use/backup-system specifying circuit determines or detects that the receiving circuit serving as the system in use is normal.

REFERENCES:
patent: 4215340 (1980-07-01), Lejon
patent: 4331952 (1982-05-01), Galvin et al.
patent: 4402903 (1983-09-01), Lenderking
patent: 4562528 (1985-12-01), Baba
patent: 4611197 (1986-09-01), Sansky
patent: 4630265 (1986-12-01), Sexton
patent: 4794376 (1988-12-01), Lloyd et al.

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