一种基于双极工艺的大电流高输出电阻恒流源  

Constant Current Source with High Current and High Output Resistance Based on Bipolar Process

作　　者：李政 周文质 包磊 陈旺云 LI Zheng;ZHOU Wenzhi;BAO Lei;CHEN Wangyun(Guizhou Zhenhua Fengguang Semiconductor Co.,Ltd.,Guiyang 550018,China)

机构地区：[1]贵州振华风光半导体有限公司,贵阳550018

出　　处：《电子与封装》2023年第12期34-38,共5页Electronics & Packaging

摘　　要：基于双极工艺,设计了一种同时具备大电流和高输出电阻特性的恒流源电路。该恒流源采用发射极输出的结构,使恒流源的输出电阻对输出电流不敏感,从而在大电流情况下保持较大的输出电阻。该结构适用于需要提供稳定大电流的集成电路,例如功率运算放大器的驱动级前级恒流源有源负载等。Based on the bipolar process,a constant current source circuit with high current and high output resistance is designed.An emitter-out structure is applied in the constant current source so that the output resistance is not sensitive to the output current,and accordingly the current source can keep a high output resistance when offering a high current.This structure is suitable for the ICs which need a constant high current,such as the active load of constant current source in the front stage of the driving stage of power operational amplifiers.

关 键 词：双极工艺 大电流 高输出电阻 恒流源 

分 类 号：TN402[电子电信—微电子学与固体电子学]