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1. 发明公开

EP0403147A3 Line interface circuit and a method of testing such a circuit 失效
标题翻译：线路接口电路和测试这种电路的方法
公开(公告)号：EP0403147A3
公开(公告)日：1992-08-26
申请号：EP90306136.4
申请日：1990-06-06
申请人： TEXAS INSTRUMENTS INCORPORATED , TEXAS INSTRUMENTS LIMITED
发明人： Kerslake, Richard M. , Fattori, Frank R.
IPC分类号： H04L1/24
CPC分类号： H04L1/243
摘要： A line interface circuit sends two-level signals to a line and receives two-level signals from a line. The two levels of the signals are on opposite sides of a threshold range of levels. For testing the circuit the transmitter is connected to the receiver by a switchable path, and a test signal is produced by the transmitter for reception by the receiver for monitoring the functioning of the circuit. The test signal is of a small amplitude so as not to enter the threshold range of levels). The connections of the transmitter and receiver to the line are maintained during testing. During testing the output of the transmitter is limited in amplitude by a voltage clamp so that it can produce only the test signal.

2. 发明授权

EP0403147B1 Line interface circuit and a method of testing such a circuit 失效
标题翻译：电源接口电路和方法，用于检测这样的电路，
公开(公告)号：EP0403147B1
公开(公告)日：1997-01-08
申请号：EP90306136.4
申请日：1990-06-06
申请人： TEXAS INSTRUMENTS INCORPORATED , TEXAS INSTRUMENTS LIMITED
发明人： Kerslake, Richard M. , Fattori, Frank R.
IPC分类号： H04L1/24
CPC分类号： H04L1/243

3. 发明公开

EP0403147A2 Line interface circuit and a method of testing such a circuit 失效
标题翻译： Leistungsschnittstellenschaltung und Verfahren zurPrüfungeiner solchen Schaltung。
公开(公告)号：EP0403147A2
公开(公告)日：1990-12-19
申请号：EP90306136.4
申请日：1990-06-06
申请人： TEXAS INSTRUMENTS INCORPORATED , TEXAS INSTRUMENTS LIMITED
发明人： Kerslake, Richard M. , Fattori, Frank R.
IPC分类号： H04L1/24
CPC分类号： H04L1/243
摘要： A line interface circuit sends two-level signals to a line and receives two-level signals from a line. The two levels of the signals are on opposite sides of a threshold range of levels. For testing the circuit the transmitter is connected to the receiver by a switchable path, and a test signal is produced by the transmitter for reception by the receiver for monitoring the functioning of the circuit. The test signal is of a small amplitude so as not to enter the threshold range of levels). The connections of the transmitter and receiver to the line are maintained during testing. During testing the output of the transmitter is limited in amplitude by a voltage clamp so that it can produce only the test signal.
摘要翻译：线路接口电路向线路发送两电平信号，并从一条线路接收两电平信号。信号的两个电平位于阈值阈值范围的相对侧。为了测试电路，发射机通过可切换的路径连接到接收机，并且发射机产生测试信号，以便接收机接收用于监测电路功能的测试信号。测试信号的幅度小，不进入阈值阈值范围）。发射机和接收机与线路的连接在测试期间保持不变。在测试期间，发射器的输出通过电压钳位在幅度上受到限制，使得它只能产生测试信号。

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