PSM调制的新型电流极限比较器  

A New PSM Modulated Current-Limited Comparator

作　　者：刘永根[1] 罗萍[1] 张波[1] 李肇基[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,成都610054

出　　处：《电工技术学报》2009年第3期153-158,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点资助项目(60436030)

摘　　要：新型电流极限比较器由电流检测电路和电流比较电路两个部分组成。电流检测电路不仅能检测电感电流的大小,还能将检测电流精确引出,省去了脉冲前沿消隐电路;电流比较电路用电流镜网络代替传统的电阻网络,用电流比较器代替传统的电压比较器,能大大减小芯片面积,具有低功耗和高速的特性。采用电源或地作为开关,省去了占较大芯片面积的开关管。仿真结果表明,整个电路具有非常好的性能,容差分析电路的精度在1%以内,适于大批量生产,具有较大的实用价值。This paper proposes a new current-limited comparator including current detect and current comparison circuits. The current detect circuit has good accuracy and doesn＇t need resistor network and edge blanking circuit. The current comparison circuit use current mirror network and current comparator to produce different duty cycles. The whole circuit has lots of advantages in the espects of area, cost and power consumption compared with traditional structures. The simulation results and error, analyses of the whole circuits show that it＇s very useful for engineering applications.

关 键 词：PSM调制 电流极限比较 电流检测 电流比较 

分 类 号：TM462[电气工程—电器]