发明名称 |
OPTISCHER EMPFÄNGER. |
摘要 |
PCT No. PCT/GB90/01607 Sec. 371 Date May 26, 1993 Sec. 102(e) Date May 26, 1993 PCT Filed Oct. 18, 1990 PCT Pub. No. WO91/06157 PCT Pub. Date May 2, 1991.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. |
申请公布号 |
DE69015203(T2) |
申请公布日期 |
1995.05.04 |
申请号 |
DE1990615203T |
申请日期 |
1990.10.18 |
申请人 |
BRITISH TELECOMMUNICATIONS P.L.C., LONDON, GB |
发明人 |
CLARKE, DONALD, ERIC, ARTHUR, COLCHESTER CO1 1EY, GB |
分类号 |
H04B10/00;H04B10/158;H04B10/20;H04J3/00;(IPC1-7):H04B10/14 |
主分类号 |
H04B10/00 |
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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