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1. 发明授权

US5592097A Load open state detection using H-bridge driving circuit 失效
标题翻译：使用H桥驱动电路加载开路状态检测
公开(公告)号：US5592097A
公开(公告)日：1997-01-07
申请号：US441199
申请日：1995-05-15
申请人： Toshifumi Shimizu , Yumiko Iwanami , Kazuhiro Mori
发明人： Toshifumi Shimizu , Yumiko Iwanami , Kazuhiro Mori
IPC分类号： G01R31/02 , G01R31/42
CPC分类号： G01R31/42 , G01R31/025
摘要： A load open state detection circuit includes a driver having X and Y terminals between which an inductive load is connected and which receive drive signals, a first transistor whose base is connected to the X terminal and whose collector is connected to a terminal supplied with a predetermined voltage, a second transistor whose base is connected to the Y terminal and whose collector is connected to the terminal supplied with a predetermined voltage and third and fourth transistors having bases thereof connected to input terminals supplied with respective drive signals. A fifth transistor has a base connected to the base of the first transistor, a collector connected to a resistor which is in turn connected to the collector of the first transistor, and an emitter connected to a second resistor which is connected to the emitter of the first transistor. A sixth transistor is provided, having a base connected to the base of the fourth transistor and a collector and emitter connected through respective resistors to the collector and emitter of the fourth transistor, respectively. A logic gate circuit receives voltages of the collectors of the fifth and sixth transistors to determine whether or not a load current flows between X and Y terminals to thereby detect whether the load is in a normal or an open state.
摘要翻译：负载打开状态检测电路包括具有X和Y端子的驱动器，在该端子之间连接有感性负载并且接收驱动信号的第一晶体管，其基极连接到X端子并且其集电极连接到提供有预定的电压，第二晶体管的基极连接到Y端子，其集电极连接到提供有预定电压的端子，第三和第四晶体管的基极连接到提供有相应驱动信号的输入端。第五晶体管具有连接到第一晶体管的基极的基极，连接到电阻器的集电极，电阻器又连接到第一晶体管的集电极，以及连接到第二电阻器的发射极，第二电阻器连接到第一晶体管的发射极第一晶体管。提供第六晶体管，其具有连接到第四晶体管的基极的基极和通过相应电阻器分别连接到第四晶体管的集电极和发射极的集电极和发射极。逻辑门电路接收第五和第六晶体管的集电极的电压，以确定负载电流是否在X和Y端子之间流动，从而检测负载是正常还是打开状态。

2. 发明授权

US5457391A Load short-circuit detection using AWH-bridge driving circuit and an exclusive-OR gate 失效
标题翻译：使用H桥驱动电路加载开路状态检测。
公开(公告)号：US5457391A
公开(公告)日：1995-10-10
申请号：US110368
申请日：1993-08-23
申请人： Toshifumi Shimizu , Yumiko Iwanami , Kazuhiro Mori
发明人： Toshifumi Shimizu , Yumiko Iwanami , Kazuhiro Mori
IPC分类号： G01R31/02 , G01R31/42 , G01R31/08
CPC分类号： G01R31/42 , G01R31/025
摘要： A load short-circuit state detection circuit has a driver including X and Y terminals between which an inductive load is connected and receiving drive signals. The detection circuit further includes a first transistor whose base is connected to the X terminal and whose collector is supplied with a voltage, a second transistor whose base is connected to the Y terminal and whose collector is also supplied with a voltage, a first constant current circuit connected to an emitter of the first transistor through a first resistor and a second constant current circuit connected to an emitter of the second transistor through a second resistor. A comparator is provided for comparing a voltage of a node between the first resistor and the first constant current circuit with a voltage of a node between the second resistor and the second constant current circuit. An exclusive OR gate circuit receives one of the drive signals supplied to the driver and an output signal of the comparator and executes an exclusive OR operation on these signals. The comparator is capable of detecting a potential difference between the two input signals.
摘要翻译：负载短路状态检测电路具有包括X和Y端子的驱动器，在该端子之间连接感性负载并接收驱动信号。检测电路还包括第一晶体管，其基极连接到X端子并且其集电极被提供电压;第二晶体管，其基极连接到Y端子并且其集电极还被提供有电压，第一恒定电流电路通过第一电阻器连接到第一晶体管的发射极，通过第二电阻器连接到第二晶体管的发射极的第二恒流电路。提供比较器，用于将第一电阻器和第一恒定电流电路之间的节点的电压与第二电阻器和第二恒定电流电路之间的节点的电压进行比较。异或门电路接收提供给驱动器的驱动信号之一和比较器的输出信号，并对这些信号执行异或运算。比较器能够检测两个输入信号之间的电位差。

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