Light receiving circuit
专利汇可以提供Light receiving circuit专利检索，专利查询，专利分析的服务。并且PURPOSE:To prevent the relay transmission of erroneous information due to establishment of troubles by providing a detecting circuit for detecting that the signals become higher than a preset value which is lower a preset value than such a bias voltage as is generaged when a trouble takes place. CONSTITUTION:When the bias voltage of an APD (avalanche photodiode) becomes higher than V3, the input voltage Va pf a comparator COMPA is increased whereas the other input voltage Vb remains constant. As a result, a gate circuit G is closed so that the recognizing output of a recognizer IDT is not fed to a drive circuit of subsequent stage. The input voltage Vb is so preset that it is equal to the other input voltage Va of the comparator COMPA corresponding to the bias voltage V3 which is lower a preset value than the bias voltage VN when no input optical signal is fed. Under the abnormal condition that the input optical signals are blocked or abnormally lowered, the abnormal rise in the bias voltage is detected, and the gate circuit G is accordingly closed so that the output of the erroneous signals having the noise component discriminated may be prevented.，下面是Light receiving circuit专利的具体信息内容。
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