公开(公告)号：US4792748A

公开(公告)日：1988-12-20

申请号：US121652

申请日：1987-11-17

申请人： David M. Thomas ,  Rodney T. Burt ,  Robert M. Stitt, II

发明人： David M. Thomas ,  Rodney T. Burt ,  Robert M. Stitt, II

IPC分类号： H03F3/343 ,  C08F8/20 ,  G05F3/30 ,  H03F1/30 ,  H03F3/34 ,  H03F3/347 ,  G05F3/26

CPC分类号： G05F3/30 ,  C08F8/20 ,  Y10S323/907

摘要： A two-terminal temperature-compensated current source includes a first transistor having its emitter connected to a first terminal, its base connected to the base of a second transistor, and its collector coupled to a current mirror. The second transistor has its emitter coupled to the first terminal by a first resistor and its collector coupled to the current mirror. A second resistor is coupled between the first terminal and the base of the first transistor. The current mirror is coupled between a second terminal and the collectors of the first and second transistors so that all current supplied to the current mirror from the second terminal flows into the collectors of the first and second transistors. A third transistor has its base coupled to the collector of the first transistor, its emitter coupled to the base of the first transistor, and its collector coupled to the second terminal. The current in the first resistor has a positive temperature coefficient, and the current in the second resistor has a negative temperature coefficient. The temperature coefficient of the total current flowing between the first and second terminals is adjusted by adjusting the ratio between the first and second resistors.

摘要翻译： 两端温度补偿电流源包括其发射极连接到第一端子的第一晶体管，其基极连接到第二晶体管的基极，并且其集电极耦合到电流镜。 第二晶体管的发射极通过第一电阻器耦合到第一端子，并且其集电极耦合到电流镜。 第二电阻器耦合在第一晶体管的第一端子和基极之间。 电流镜耦合在第二端子和第一和第二晶体管的集电极之间，使得从第二端子提供给电流镜的所有电流流入第一和第二晶体管的集电极。 第三晶体管的基极耦合到第一晶体管的集电极，其发射极耦合到第一晶体管的基极，其集电极耦合到第二晶体管。 第一电阻器中的电流具有正温度系数，并且第二电阻器中的电流具有负温度系数。 通过调整第一和第二电阻器之间的比例来调节在第一和第二端子之间流动的总电流的温度系数。