公开(公告)号：US06239617B1

公开(公告)日：2001-05-29

申请号：US09434861

申请日：1999-11-04

申请人： David LeRoy Guertin ,  Robert Russell Williams ,  Daniel Guy Young ,  Joseph James Cahill

发明人： David LeRoy Guertin ,  Robert Russell Williams ,  Daniel Guy Young ,  Joseph James Cahill

IPC分类号： H03K190175

CPC分类号： H03K19/0005

摘要： A mixed voltage output driver includes an output sensing circuit that senses an output voltage at an output terminal and generates a voltage signal that corresponds to a voltage level at the output terminal. Next, an impedance selection circuit receives the voltage signal and generates a control signal in response to the output voltage having a higher logical uplevel than the mixed voltage output driver. The control signal is then received by an adjustable drive impedance circuit that is also coupled to an input terminal of the mixed voltage output driver and, in response thereto, the adjustable drive impedance circuit modifies an output drive impedance of the mixed voltage output driver. In another advantageous embodiment, the mixed voltage output driver only determines if the output voltage at the output terminal is at a logical uplevel before adjusting the output drive impedance.

摘要翻译： 混合电压输出驱动器包括输出感测电路，其感测输出端子处的输出电压并产生对应于输出端子处的电压电平的电压信号。 接下来，阻抗选择电路接收电压信号，并响应于具有比混合电压输出驱动器更高的逻辑高电平的输出电压产生控制信号。 然后，控制信号被可调驱动阻抗电路接收，该可调驱动阻抗电路也耦合到混合电压输出驱动器的输入端，并且响应于此，可调驱动阻抗电路修改混合电压输出驱动器的输出驱动阻抗。 在另一个有利的实施例中，混合电压输出驱动器仅在调整输出驱动阻抗之前确定输出端子处的输出电压是否处于逻辑上限。

公开(公告)号：US06222413B1

公开(公告)日：2001-04-24

申请号：US09270031

申请日：1999-03-16

申请人： Joseph James Cahill

发明人： Joseph James Cahill

IPC分类号： H03K1700

CPC分类号： G06F13/4072

摘要： An improved net driver circuit is provided. The net driver circuit includes a control circuit. A bi-directional input/output (I/O) circuit is coupled to the control circuit. The bi-directional input/output (I/O) circuit includes a receiver and a driver. The control circuit monitors the net and responsive to a new changed state of the net being identified, the control circuit enables the driver to drive the net to the new changed state. The receiver senses the current state of the net and the control circuit remembers the previous state of the net. When the net state is the same as the previous state, the control circuit causes the driver to be in a high impedance state.

摘要翻译： 提供了一种改进的网络驱动器电路。 网络驱动器电路包括控制电路。 双向输入/输出（I / O）电路耦合到控制电路。 双向输入/输出（I / O）电路包括接收器和驱动器。 控制电路监视网络并响应被识别的网络的新的改变状态，控制电路使驾驶员能够将网络驱动到新的改变状态。 接收器感测网络的当前状态，并且控制电路记住网络的先前状态。 当净状态与先前状态相同时，控制电路使驱动器处于高阻抗状态。

公开(公告)号：US5804998A

公开(公告)日：1998-09-08

申请号：US772879

申请日：1996-12-26

申请人： Joseph James Cahill ,  Robert Russell Williams ,  Daniel Guy Young

发明人： Joseph James Cahill ,  Robert Russell Williams ,  Daniel Guy Young

IPC分类号： G11C7/10 ,  H03K19/0185 ,  G11C8/00

CPC分类号： H03K19/018521 ,  G11C7/1051 ,  G11C7/1078

摘要： The present invention is a driver circuit for interfacing electronic components which have different supply voltages. The driver circuit includes a source terminal for receiving a source voltage, an output terminal connected to an off-chip electronic component, and a pull up circuit disposed between the source and output terminals for providing a field effect controlled current path between the source terminal and the output terminal. The pull up circuit includes a first transistor in series with a second transistor, the second transistor providing overvoltage stress relief for the first transistor.

摘要翻译： 本发明是用于接口具有不同电源电压的电子部件的驱动电路。 驱动器电路包括用于接收源极电压的源极端子，连接到片外电子部件的输出端子和设置在源极和输出端子之间的上拉电路，用于在源极端子和源极端子之间提供场效应控制电流路径 输出端子。 上拉电路包括与第二晶体管串联的第一晶体管，第二晶体管为第一晶体管提供过压应力释放。