节点文献
一种高精度带隙基准源和过温保护电路
A High-Precision Bandgap Reference and Over-Temperature Protection Circuit
【摘要】 设计了一种适用于P阱CMOS工艺的高精度带隙基准源及过温保护电路。基准源信号输出由两路电流相加实现:一路是正比于双极晶体管的发射极-基极电压的电流(IVBE),另一路是基准源内产生的正比于绝对温度的电流(IPTAT);同时,利用这两路电流的不同温度特性,通过直接电流比较的方法,简单地实现了高精度的过温保护电路。
【Abstract】 A high-precision bandgap reference with an over-temperature protection circuit is designed, which is suitable for P-well CMOS technology. The output of the reference voltage is determined by the sum of two currents: current proportional to the emitter-base voltage (VBE) of a bipolar transistor (IVBE), and current proportional to the absolute temperature (IPTAT). The high-precision over-temperature protection circuit is realized by making a direct comparison between the two branches of currents, which have different temperature characteristics.
【关键词】 带隙基准源;
过温保护;
电压-电流转换;
共栅共源结构;
【Key words】 Bandgap reference; Over-temperature protection; Voltage-current conversion; Cascode;
【Key words】 Bandgap reference; Over-temperature protection; Voltage-current conversion; Cascode;
【基金】 国家自然科学基金资助项目(69836010)
- 【文献出处】 微电子学 ,Microelectronics , 编辑部邮箱 ,2005年02期
- 【分类号】TN431.1
- 【被引频次】29
- 【下载频次】727