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1. 发明授权

US5796781A Data receiver having bias restoration 失效
标题翻译：数据接收机具有偏置恢复
公开(公告)号：US5796781A
公开(公告)日：1998-08-18
申请号：US417239
申请日：1995-04-05
申请人： John J. DeAndrea , Keith M. Conroy
发明人： John J. DeAndrea , Keith M. Conroy
IPC分类号： H04L25/06 , H04L25/49
CPC分类号： H04L25/061 , H04L25/0266 , H04L25/4925
摘要： A data received is provided with DC restoration circuitry for correcting the DC level of received multi-level data signals. A DC shift detection circuit detects whether the received DC level multi-level signals has shifted due to a predominance of one of the data levels in the data stream. A correction circuit responds to the shift detection circuit by applying a corrective bias to an isolation transformer. Alternatively, the correction circuit applies a corrective bias to the received signals within the receiver circuit.
摘要翻译：接收到的数据被提供有DC恢复电路，用于校正接收的多电平数据信号的DC电平。直流偏移检测电路由于数据流中数据电平之一的优势而检测接收到的直流电平多电平信号是否已经移位。校正电路通过对隔离变压器施加校正偏置来响应移位检测电路。或者，校正电路对接收器电路内的接收信号施加校正偏置。

2. 发明授权

US5533054A Multi-level data transmitter 失效
标题翻译：多级数据发射机
公开(公告)号：US5533054A
公开(公告)日：1996-07-02
申请号：US89973
申请日：1993-07-09
申请人： John J. DeAndrea , Keith M. Conroy
发明人： John J. DeAndrea , Keith M. Conroy
IPC分类号： H04L25/06 , H04L25/49
CPC分类号： H04L25/0266 , H04L25/061 , H04L25/4925
摘要： A data transmitter circuit includes a pseudoternary conversion circuit for converting a binary logic signal to a differential pseudoternary signal having symmetric rise and fall characteristics. The output of the pseudoternary conversion circuit is filtered and passed to an electrically conductive medium via an isolation transformer. The conversion circuit includes a symmetric arrangement of toggle circuits which respond to transitions in respective complementary binary signals constituting a differential binary input signal. Voltage dividers are connected to the output terminals of the toggle circuits for providing three levels of output voltages in response to the logical states of the toggle circuits.
摘要翻译：数据发送器电路包括用于将二进制逻辑信号转换成具有对称上升和下降特性的差分伪三态信号的伪三进制转换电路。将该三元转换电路的输出经过隔离变压器滤波并传送到导电介质。转换电路包括对构成差分二进制输入信号的各个互补二进制信号中的转变作出响应的触发电路的对称布置。电压分压器连接到拨动电路的输出端，用于响应于触发电路的逻辑状态提供三个等级的输出电压。

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