公开(公告)号：US06556082B1

公开(公告)日：2003-04-29

申请号：US09976445

申请日：2001-10-12

申请人： Nanlei Larry Wang ,  Sarah Xu ,  Shuo-Yuan Hsiao

发明人： Nanlei Larry Wang ,  Sarah Xu ,  Shuo-Yuan Hsiao

IPC分类号： H03F304

CPC分类号： H03F1/302

摘要： A temperature compensating circuit for use with a current mirror circuit for maintaining a reference current value during temperature variations includes a compensating transistor connected in parallel with a reference current transistor and bias circuitry for biasing the compensating transistor whereby current flows from the reference node to ground through the compensating transistor to remove excess current from the reference transistor when temperature increases. A diode can be included in the bias circuitry for limiting bias current flow when the reference voltage drops below the voltage drop of the diode. An on/off switch circuit can be provided in parallel with the reference current transistor to further reduce reference current in specific applications.

摘要翻译： 在温度变化期间用于维持参考电流值的电流镜电路的温度补偿电路包括与参考电流晶体管并联连接的补偿晶体管和用于偏置补偿晶体管的偏置电路，从而电流从参考节点流过地面通过 补偿晶体管，以在温度升高时去除参考晶体管的过剩电流。 当参考电压低于二极管的电压降时，偏置电路中可包括二极管以限制偏置电流流动。 可以与参考电流晶体管并联提供开/关开关电路，以在特定应用中进一步减少参考电流。