专利名称：Device for triggering an alarm system in the
event of insufficiency of the transmissionlevel, for the receiver module of an optical-fiber transmission system
发明人：Bertrand Jarret,Rose Cordier申请号：US06/232966申请日：19810209公开号：US04399565A公开日：19830816
摘要：An alarm-triggering device for the receiver of an optical- fiber transmissionsystem including in series a filter which has a passband located externally with respect tothe band of frequencies employed for optical- fiber transmission and the input of which isconnected to an avalanche photodiode, an amplifier, a rectifier, a voltage comparatorcircuit, and alarm- triggering circuit.
申请人：LIGNES TELEGRAPHIQUES ET TELEPHONIQUES
代理机构：Cushman, Darby & Cushman
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