高精度带隙可编程基准电流源的设计  

Design of Programmable Bandgap Reference Current Source with High Precision

作　　者：唐玉兰 陈建慧[2] 

机构地区：[1]无锡城市学院电子信息工程系,江苏无锡214151 [2]无锡职业技术学院,江苏无锡214121

出　　处：《无锡职业技术学院学报》2012年第6期81-84,共4页Journal of Wuxi Institute of Technology

摘　　要：提出了一种新的CMOS高精度带隙可编程基准电路,设计了高精度运放电路和可编程基准电流源电路结构。整个电路采用的是0.18μm标准的CMOS工艺,仿真结果表明,温度在-40～120℃范围内时,基准电压变化为3.2mV。该电路已成功应用于14位高速DAC中,所设计的DAC转换器的输出电流范围为8～32mA。在应用中可根据实际需求,通过调节改变输出电流大小。A new programmable CMOS bandgap reference circuit of high precision is proposed. The circuit structure of the high-precision Operational Amplifier and the programmable current reference is also designed. The whole circuit was designed with 0.18 μm standard CMOS technology, and the simulation results show that the movement of reference voltage is 3.2mV while the temperature is range --40 ℃ from 120 ℃. The circuit has been successfully applied in 14-bit high speed DAC, while the output current range of DAC is 8-32 mA. The output current can be changed according to the practical application.

关 键 词：带隙基准电流源 温度系数 高精度 数模转换器 

分 类 号：TN432[电子电信—微电子学与固体电子学]