发明名称 |
Signal input cutoff detector, photo receiver and signal input cutoff detecting method |
摘要 |
A photo receiver branches a data signal obtained by photoelectric conversion and supplies the signal to a signal cutoff detector. Depending on the degree of an autocorrelation of a data signal obtained by an autocorrelation detector, the signal cutoff detector detects abnormality/normality. Depending on a level of a control signal to a VCO contained in a frequency phase-locked loop for use in clock generation, an out-of-synchronization detector makes determination of abnormality/normality. Outputs of both the detectors are ORed at an alarm processor and when at least one of the detectors detects abnormality, the detector generates an alarm.
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申请公布号 |
US2001048067(A1) |
申请公布日期 |
2001.12.06 |
申请号 |
US20010864306 |
申请日期 |
2001.05.25 |
申请人 |
MATSUMOTO YOSHIHIRO;KURIYAMA TAKASHI;HONMA YOSHINORI;TACHIGORI MASASHI |
发明人 |
MATSUMOTO YOSHIHIRO;KURIYAMA TAKASHI;HONMA YOSHINORI;TACHIGORI MASASHI |
分类号 |
H03K5/19;H04B10/04;H04B10/06;H04B10/08;H04B10/14;H04B10/158;H04B10/26;H04B10/28;H04L7/00;H04L25/02;(IPC1-7):H01J40/14 |
主分类号 |
H03K5/19 |
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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