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1. 发明申请

WO2005109462A2 APPARATUS AND METHOD FOR SHIFTING A SIGNAL FROM A FIRST REFERENCE LEVEL TO A SECOND REFERENCE LEVEL 审中-公开
标题翻译：将信号从第一参考电平移位到第二参考电平的装置和方法
公开(公告)号：WO2005109462A2
公开(公告)日：2005-11-17
申请号：PCT/US2005/015353
申请日：2005-05-02
申请人： TEXAS INSTRUMENTS INCORPORATED , FATTARUSO, John, W. , SHEAHAN, Benjamin, J.
发明人： FATTARUSO, John, W. , SHEAHAN, Benjamin, J.
IPC分类号： H01H83/00
CPC分类号： H03K19/0136 , H03K17/04126 , H03K19/00346 , H03K19/00376 , H03K19/01812 , Y10T307/826
摘要： A level-shifting apparatus 80 includes an input section 82, level shift sections 84 and output sections 86. Differential signaling input signals received from an upstream data source at input terminals 100, 102 of input section 82 are coupled with respective bases of common emitter NPN bipolar transistors Q1, Q2 and respectively presented at collector outputs 124, 126 to level shift sections 84. Each level shift section 84 includes a low speed network 130 and a high speed network 140 coupled substantially in parallel between a respective output 124, 126 and an output locus 88. Low speed network 130 operates as a level setting signal path to set the DC (direct current) level at output locus 88 to a desired level. Low speed network 130 employs an active amplifier component to set output DC resistance. In one embodiment, the active component is an NPN bipolar transistor Q 4 configured as an emitter-follower, with its base connected to an output 124, 126 via a resistor R LS . High speed network 140 operates as a signal transition path to speed up provision of signal transitions (for example, information bearing signal transitions) to output locus 88. In one embodiment, a base 142 of an NPN bipolar transistor Q 5 is driven without added series resistance to avoid delay and unwanted filtering. Output section 86 connects signals appearing at output locus 88 with downstream portions of a communication system.
摘要翻译：电平移位装置80包括输入部分82，电平移位部分84和输出部分86.输入部分82的输入端子100,102处的从上游数据源接收的差分信令输入信号与公共发射极NPN的相应基极耦合双极晶体管Q1，Q2并分别呈现在集电极输出124,126至电平移位部分84.每个电平移位部分84包括低速网络130和高速网络140，高速网络140基本上并联耦合在相应的输出124,126和输出轨迹88.低速网络130作为电平设置信号路径操作，以将输出轨迹88处的DC（直流）电平设置为期望的电平。低速网络130采用有源放大器组件来设置输出直流电阻。在一个实施例中，有源部件是被配置为射极跟随器的NPN双极晶体管Q4，其基极通过电阻器RLS连接到输出端124,126。高速网络140作为信号转换路径进行操作，以加速提供信号转换（例如，信息承载信号转换）到输出轨迹88.在一个实施例中，NPN双极晶体管Q5的基极142被驱动而不增加串联电阻以避免延迟和不需要的过滤。输出部86将出现在输出轨迹88处的信号与通信系统的下游部分连接。

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