发明名称 |
LIGHT-EMISSION ERROR PREVENTING CIRCUIT FOR OPTICAL TRANSMITTER |
摘要 |
A subscriber-side optical network unit (ONU) has a control LSI (10) for outputting a data signal and a pre-bias signal at fixed intervals, an optical transmitter-receiver (30) for producing optical output in response to these signals, and a light-emission error preventing circuit (20) for preventing light-emission error. First and second light-emission error detecting circuits (21) and (22) output an abnormality detection alarm signal when no rising edge occurs in the data signal and pre-bias signal for a prescribed period of time. An OR element (23), when receiving the abnormality detection alarm signal from at least one of the first and second light-emission error detecting circuits (21) and (22), supplies the optical transmitter-receiver (30) with a shutdown signal and halts the optical output. |
申请公布号 |
EP2472747(A4) |
申请公布日期 |
2015.05.06 |
申请号 |
EP20100811409 |
申请日期 |
2010.04.28 |
申请人 |
MITSUBISHI ELECTRIC CORPORATION |
发明人 |
SENOO, KENJI;NODA, MASAKI;YAMANAKA, SHIGEO;KATAYAMA, MASATOSHI |
分类号 |
H04B10/50;H04B10/60;H04B10/079;H04B10/272;H04B10/40;H04B10/564 |
主分类号 |
H04B10/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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