关于恒流源电路的研究与几种设计方案

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1、关于恒流源电路的研究与几种设计方案关键词：晶体管恒流源；场效应管恒流源；集成运放恒流源；输出电流；开关恒流源；场效应管；稳压器；开关恒流源；数控直流恒流源；SPCE061A；单片机。中文摘要本文首先从恒流源基本概念，基本电路开始分类，将恒流源电路概括为三大类。然后针对具体的思路进行设计。设计出运放构成的线性恒流源、采用开关电源的开关恒流源、集成稳压器构成的开关恒流源等三类恒流源电路，并针对单片机设计了一种数控恒流源电路，这中电路主要是运用SPCE061A单片机，并以SPCE061A为核心控制器，对整个恒流源电路进行控制。主要运行过程是：SPCE061A单片机送出相应的

2、数字信号，经过D/A转换、信号放大、电平转换、压控恒流源，再输出所需电流；实际输出的电流经过精密电阻变成取样电压信号，经高输入阻抗放大器、A/D转换器，将信号反馈到凌阳SPCE061A单片机中构成闭环控制；通过液晶显示器显示此信号的值AboutpermanentcurrentsourceelectricircuitcertainquestionsresearchElectronicinformationprojectGrad2003ZhangYinGeKeyword:Transistorpermanentcurrentsource;Fieldeffecttubeper

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6、eelectriccircuitmainlyutilizestheSPCE061Amonolithicintegratedcircuit，AndtakeSPCE061Aasthecorecontroller.Carriesonthecontroltotheentirepermanentcurrentsourceelectriccircuit.Themainmovementprocessis:TheSPCE061Amonolithicintegratedcircuitsendsoutthecorrespondingdigitalsignal,Transforms,the

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