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公开(公告)号:US07039020B1
公开(公告)日:2006-05-02
申请号:US09529427
申请日:1998-10-27
申请人: Gunnar Bahlenberg , Daniel Bengtsson , Siwert Hakansson , Anders Isaksson , Lars-Ake Isaksson , Mikael Isaksson , Magnus Johansson , Mauritz Lahti , Lis-Marie Ljunggren , Hans Lundberg , Tomas Nordstrom , Lennart Olsson , Sven-Rune Olofsson , Tomas Stefansson , Hans Oman , Goran Okvist , Per Odling , Petra Dentgen , Franck Sjöberg
发明人: Gunnar Bahlenberg , Daniel Bengtsson , Siwert Hakansson , Anders Isaksson , Lars-Ake Isaksson , Mikael Isaksson , Magnus Johansson , Mauritz Lahti , Lis-Marie Ljunggren , Hans Lundberg , Tomas Nordstrom , Lennart Olsson , Sven-Rune Olofsson , Tomas Stefansson , Hans Oman , Goran Okvist , Per Odling , Petra Dentgen , Franck Sjöberg
IPC分类号: H04J1/00
CPC分类号: H04B3/23
摘要: The hybrid circuit can be used to substantially reduce near echo signals. The circuit includes a balanced 2-wire to 4-wire hybrid for interconnecting a two wire receive path and a two wire transmit path to a two wire transmission line. The two wire receive path connects the balanced hybrid to an A/D converter and the two wire transmit path connects a D/A converter to the balanced hybrid. The two wire receive path contains a filter, dimensioned to remove signals transmitted from the D/A converter. The invention is particularly adapted for use with FDD and OFDD.
摘要翻译: 混合电路可以用于大大减少近回波信号。 该电路包括用于将两线接收路径和两线传输路径互连到双线传输线的平衡的2线至4线混合。 两线接收路径将平衡混合器连接到A / D转换器,并且双线传输路径将D / A转换器连接到平衡混合器。 两线接收路径包含滤波器,其尺寸用于去除从D / A转换器发送的信号。 本发明特别适用于FDD和OFDD。