发明名称 |
Automatic gain control device for a burst-mode optical receiver |
摘要 |
An automatic-gain-control device in an optical receiver is provided and includes a pre-amplifier for converting a current signal outputted from an optical detector to a voltage signal and a bottom level detector for detecting the bottom level from the output of the pre-amplifier, the automatic-gain-control device comprising a bottom signal-level-determining section for analyzing the bottom level from the bottom level detector and outputting a signal denoting the presence of a signal and a reset signal for initialization at intervals between packets; and an automatic-gain-control signal generating section for providing an automatic-gain-control signal by showing the presence of a signal, the automatic-gain-control-signal-generating section including a first transistor which turns on according to a signal from the bottom signal-level-determining section and a second transistor which is connected to a capacitor for charging or discharging a voltage applied by the first transistor, and the drain voltage of which becomes low when the capacitor is charged but becomes high when the capacitor is discharged.
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申请公布号 |
US2003201382(A1) |
申请公布日期 |
2003.10.30 |
申请号 |
US20030389058 |
申请日期 |
2003.03.14 |
申请人 |
DOH HEE-CHAN;PARK GIL-YONG;WON SHIN-HEE;OH YUN-JE;PARK TAE-SUNG;KI HYEON-CHEOL |
发明人 |
DOH HEE-CHAN;PARK GIL-YONG;WON SHIN-HEE;OH YUN-JE;PARK TAE-SUNG;KI HYEON-CHEOL |
分类号 |
H03F3/08;H03G3/20;H03G3/30;H04B10/04;H04B10/06;H04B10/14;H04B10/26;H04B10/28;(IPC1-7):H01J40/14 |
主分类号 |
H03F3/08 |
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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