发明授权
- 专利标题： Optical receiver
- 专利标题（中）： 光接收机
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申请号： US859413申请日： 1992-05-26
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公开(公告)号： US5353143A公开(公告)日： 1994-10-04
- 发明人: Donald E. A. Clarke
- 申请人： Donald E. A. Clarke
- 申请人地址： GB2 London
- 专利权人： British Telecommunications public Limited company
- 当前专利权人： British Telecommunications public Limited company
- 当前专利权人地址： GB2 London
- 优先权： GBX8923488.4 19891018
- 主分类号： H04B10/66
- IPC分类号： H04B10/66 ; H04J3/00 ; H04J14/08 ; H04B10/06
摘要：
A network head-end station (1) is arranged to receive an upstream TDMA frame comprising interleaved optical signals from a plurality of terminations (2) connected to the head-end station (1) by a fibre network (3). The upstream TDMA frame includes a quiet phase during which none of the terminations transmit. The station (1) includes an opto-electronic receiver (4), a DC clamping circuit (10) for the opto-electronic receiver (4) and a clamping pulse generator. The clamping pulse generator is arranged to generate a pulse at a predetermined time falling within the quiet phase to operate the DC clamping circuit to clamp signals received during the remainder of the TDMA frame to a DC reference level received during the quiet phase.
信息查询
