Signal break detecting circuit

Details Signal break detecting circuit Signal break detecting circuit

H - Electricity

04

B

H04B 17/00 (2006.01) H04B 10/08 (2006.01) H04B 10/158 (2006.01)

Patent

CA 2357813

This invention provides a signal break detecting circuit for reducing time required for detecting a data signal break. A difference between an average value of data signal amplified by a limiter amplifier (2) to a predetermined amplitude (output of a full-wave rectifying circuit (7)) and a peak value (output of a peak value detecting circuit (5)) is compared with a reference voltage with by a comparator (9) and if the difference drops below the reference voltage vth, an alarm is dispatched. Consequently, as compared to a conventional technology in which the data signal break is detected by detecting that the peak value of the reception signal drops to a predetermined value, time required for detecting a data signal break can be reduced.

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