Linear Technology Corporation推出集成了400mV电压基准的微功率比较器LT6703，该器件采用纤巧2mm×2mm封装。可用1．4—18V的电源电压工作，非常适用于低压或未稳压电源。LT6703仅需要6．5μA的静态电流和低于10nA的输入偏置电流...Linear Technology Corporation推出集成了400mV电压基准的微功率比较器LT6703，该器件采用纤巧2mm×2mm封装。可用1．4—18V的电源电压工作，非常适用于低压或未稳压电源。LT6703仅需要6．5μA的静态电流和低于10nA的输入偏置电流。LT6703的总门限误差仅为1．25％，非常适合用作电压监视器或门限检测器。展开更多
A novel design of multiplex differential voltage comparators(MDVC) is presented for reducing current and power dissipation. According to the special properties of relational operation and logical operation, parts of t...A novel design of multiplex differential voltage comparators(MDVC) is presented for reducing current and power dissipation. According to the special properties of relational operation and logical operation, parts of the comparators are redundant in some instances, and thus can be turned off. By selecting and switching the current routes, several effective differential pairs are biased by a single tail current stage-by-stage and the redundant comparators are turned off by cutting their tail currents. As a result, the quiescent current and power consumption are greatly decreased. The switching of current is achieved by the input differential pair transistors themselves and hence no extra switches are required. When a MDVC is used in a flash analog-to-digital converter(ADC), its current dissipation is much lower than that of the conventional comparators. This architecture can also be used in window-comparators, maximum or minimum comparators, and comparators for logical operations. The power dissipation in all these cases could be reduced significantly.展开更多
基金National Natural Science Foundation of China(60172004)PhD Subject Research Foundation of Ministry of Education of China(20010701003)
文摘A novel design of multiplex differential voltage comparators(MDVC) is presented for reducing current and power dissipation. According to the special properties of relational operation and logical operation, parts of the comparators are redundant in some instances, and thus can be turned off. By selecting and switching the current routes, several effective differential pairs are biased by a single tail current stage-by-stage and the redundant comparators are turned off by cutting their tail currents. As a result, the quiescent current and power consumption are greatly decreased. The switching of current is achieved by the input differential pair transistors themselves and hence no extra switches are required. When a MDVC is used in a flash analog-to-digital converter(ADC), its current dissipation is much lower than that of the conventional comparators. This architecture can also be used in window-comparators, maximum or minimum comparators, and comparators for logical operations. The power dissipation in all these cases could be reduced significantly.
