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1. 发明授权

US4650930A Adaptive equalizer 失效
标题翻译：自适应均衡器
公开(公告)号：US4650930A
公开(公告)日：1987-03-17
申请号：US701287
申请日：1985-02-13
申请人： John G. Hogeboom , Terry N. Thomas , Dennis A. Yarak , Arlan J. Anderson
发明人： John G. Hogeboom , Terry N. Thomas , Dennis A. Yarak , Arlan J. Anderson
IPC分类号： H03H21/00 , H04B3/06 , H04L25/03 , H04L25/04 , H04M11/00
CPC分类号： H04L25/03057
摘要： High-speed bipolar signals transmitted along standard twisted pair telephone wiring are subject to InterSymbol Interference which is corrected by an equalizer circuit that is operably responsive to predetermined parameters of bipolar signals detected at the secondary of a line transformer. These parameters are input to a control logic circuit which includes several stages, each producing a set of past dependent logical control signals which are input to corresponding equalizer tap circuits having outputs connected to a common output bus. Each tap circuit includes an integrator that is incrementally charged and discharged by an electronically switched capacitor. A tap weight voltage output from each integrator is subsequently summed directly or inversely by a second switched capacitor under control of the logical input signals. And, an equalizing signal output from the second capacitor is coupled through a buffer amplifier to the line transformer where it is added to the incoming signal and allows eye diagram monitoring directly at the transformer.
摘要翻译：沿着标准双绞线电话线路发送的高速双极信号经受InterSymbol干扰，该干扰由均衡器电路校正，该均衡器电路可操作地响应于在线路变压器次级检测到的双极性信号的预定参数。这些参数被输入到包括几个级的控制逻辑电路，每个级产生一组过去的依赖逻辑控制信号，这些逻辑控制信号被输入到具有连接到公共输出总线的输出的对应的均衡器抽头电路。每个抽头电路包括由电子开关电容器逐步充电和放电的积分器。随后在逻辑输入信号的控制下，从每个积分器输出的抽头重量电压随后由第二开关电容器直接或相反地相加。并且，从第二电容器输出的均衡信号通过缓冲放大器耦合到线路变压器，在那里它被添加到输入信号，并允许在变压器处直接监视眼图。

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