Device for triggering an alarm system in the event of insufficiency of the transmission level, for the receiver module of an optical-fiber transmission system
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United States of America Patent
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Aug 16, 1983
Grant Date -
N/A
app pub date -
Feb 9, 1981
filing date -
Feb 12, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An alarm-triggering device for the receiver of an optical-fiber transmission system including in series a filter which has a passband located externally with respect to the band of frequencies employed for optical-fiber transmission and the input of which is connected to an avalanche photodiode, an amplifier, a rectifier, a voltage comparator circuit, and alarm-triggering circuit.
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