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公开(公告)号：EP0812497A2
公开(公告)日：1997-12-17
申请号：EP96907159.0
申请日：1996-03-01
CPC分类号： H04W52/52 , H04B1/3877
摘要： A transceiver system for interfacing digital modems with radio frequency signals is described. The system includes a modem interface connected to the antenna interface via a coax cable, and an antenna. Circuits for providing power regulation of the exchanged signals include power detection circuits and attenuators in the antenna interface as well as in the modem interface.
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公开(公告)号：EP1175732A1
公开(公告)日：2002-01-30
申请号：EP00926034.0
申请日：2000-04-13
CPC分类号： H03F1/0261 , H03F1/02 , H03F1/0216 , H03F3/24 , H04B2001/045
摘要： A system for extending the battery life of a wireless phone has four circuits. A first circuit (20) provides a control signal (40) indicative of a mode of the wireless phone. A second circuit (20), which may be the same as the first circuit, provides a transmit signal (Tx). A third circuit (32) receives a biasing signal (42) and amplifies the transmit signal in preparation for transmission. A fourth circuit (12) selectively alters the power dissipated by the third circuit by selectively changing the biasing signal in response to the control signal.
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公开(公告)号：EP0812497B1
公开(公告)日：2003-06-04
申请号：EP96907159.6
申请日：1996-03-01
CPC分类号： H04W52/52 , H04B1/3877
摘要： A transceiver system for interfacing digital modems with radio frequency signals is described. The system includes a modem interface connected to the antenna interface via a coax cable, and an antenna. Circuits for providing power regulation of the exchanged signals include power detection circuits and attenuators in the antenna interface as well as in the modem interface.
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