一种无运放的高电源抑制比基准电压源设计  

Design of a High PSRR Voltage Reference Source Without Operational Amplifier

作　　者：姬晶 刘树林[1] 

机构地区：[1]西安科技大学电气与控制工程学院,西安710054

出　　处：《微电子学》2014年第5期610-614,619,共6页Microelectronics

基　　金：国家自然科学基金资助项目(50977077;51277149)

摘　　要：设计了一种基准电压源电路。在分析传统带隙基准结构的基础上,该电路不采用运放结构,避免了运放失调电压对基准源的影响,并加入内部正、负反馈回路,对基准绝对数值进行补偿。仿真结果表明,当温度在-40℃~140℃之间变化时,该电路输出电压的温度系数小于1.622×10-5/℃,电源抑制比高达98dB,符合设计要求。A reference voltage source circuit was designed. Based on the analysis of traditional band-gap reference structure, the operational amplifier structure was not used to avoid the effect of offset voltage. To compensate for the absolute value of reference, internal positive and negative feedback loops were added. Simulation results showed that at the temperature varying from -40℃ to 140℃, the temperature coefficient of output voltage was less than 1. 622× 10^-5/℃, and the power supply rejection ratio was up to 98 dB. The circuit meets the design specification.

关 键 词：基准电压源 反馈回路 电源抑制比 启动电路 

分 类 号：TN431[电子电信—微电子学与固体电子学]