公开(公告)号：US20060158223A1

公开(公告)日：2006-07-20

申请号：US11385234

申请日：2006-03-20

申请人： Yueyong Wang ,  Barry Daly ,  Nhat Nguyen ,  Yohan Frans

发明人： Yueyong Wang ,  Barry Daly ,  Nhat Nguyen ,  Yohan Frans

IPC分类号： H03K19/0175

CPC分类号： H04L25/0274 ,  H03K19/018585 ,  H04L25/0282 ,  H04L25/10

摘要： Multi-mode signal drivers with a single output circuit that may be controlled using a mode select input and that may include a common mode (CM) voltage compensation mechanism are described. In a first exemplary implementation, a multi-mode output driver is adapted to drive signals from a single output circuit according to at least two modes, such as a current mode logic (CML) signaling mode and a low voltage differential signaling (LVDS) mode. In a second exemplary implementation, a circuit comprises a quasi-LVDS output driver in which a differential amplifier circuit is connected in series with an adjustable resistive element and a programmable current source. In a third exemplary implementation, a CM voltage of an output driver circuit changes with changes to a programmable bias current. To compensate, a feedback mechanism provides a compensation signal to a variable resistive element of the output driver circuit to maintain a desired CM voltage.

摘要翻译： 描述具有可以使用模式选择输入并且可以包括共模（CM）电压补偿机制的单个输出电路的多模式信号驱动器。 在第一示例性实施例中，多模式输出驱动器适于根据至少两种模式来驱动来自单个输出电路的信号，例如电流模式逻辑（CML）信令模式和低电压差分信号（LVDS）模式 。 在第二示例性实现中，电路包括准LVDS输出驱动器，其中差分放大器电路与可调电阻元件和可编程电流源串联连接。 在第三示例性实施方案中，输出驱动器电路的CM电压随着可编程偏置电流的改变而改变。 为了补偿，反馈机构向输出驱动器电路的可变电阻元件提供补偿信号，以维持期望的CM电压。