流水式双积分器电流检测方法

为解决传统电流检测输出结果受积分常数RC限制的问题,提出了一种应用于智能电池管理芯片中的流水式双积分器电流检测方法。采用中芯国际0.18μm标准CMOS工艺,应用Spectre和Spectre Verilog等软件对相关模块进行仿真验证。在参考电压为0.3V和敏感电阻30mΩ的条件下,最终检测电流可达0.04～10A。两级流水电流工作方式的选用,使检测速度比传统方法提高了一倍。结果表明,该方法输出结果不依赖于RC,检测速度快、精度高,可以对电流进行实时检测。

Pipeline dual integration current detection method

Aimed at overcoming the limit by the integration constant RC on the output of conventional current detection,this paper proposes a pipelining dual integration current detection method designed for MCU of the Smart Battery systems.The verification of the modules of the circuit is obtained by SMIC 0.18 μm standard CMOS technology and with the EDA tools of Spectre and Spectre Verilog.With the reference voltage of 0.3 V and the sensitive resistor of 30 mΩ,the final detection current is in the range of 40 mA ～10 A.The two-stage pipelining gives twice as much detection speed as the conventional method.Experimental results show that this method,independent of RC and with a higher detection rate and precision,is capable of the real-time detection of current.