一种基于低频三角波调制的高精度I/F转换器设计  

Design of High Precision 1/F Converter Based on Low Frequency Triangular Wave Modulate

作　　者：汪金华[1] 夏海生 何一蕾 庄永河[1] 周晶[1] WANG Jin-hua;XIA Hai-sheng;HE Yi-lei;ZHUANG Yong-he;ZHOU Jing(No.43 Research Institute of CETC,Hefei 230088,China)

机构地区：[1]中国电子科技集团公司第四十三研究所,合肥230022

出　　处：《混合微电子技术》2020年第1期36-39,共4页Hybrid Microelectronics Technology

摘　　要：分析了造成电荷平衡式I/F转换器误差的主要因素,提出了一种基于低频三角波调制的电流复位技术,使电路在大电流和小电流输入时工作在同一个较低的开关频率上,降低了积分电路误差和开关频率误差,提高了电路非线性度。制作的电路非线性度达到20ppm以内,标度因素温度系数达到5ppm/℃,一次通电稳定性达到5ppm。The main factors of the charge equalizing I/F converter error are analyzed,then a current charge technology base on low frequency triangular wave modulate is given,which improves the non-linearity of the circuit by reducing the integral circuit error and the switch frequency error.The circuit made by the new method provides a non-linearity better than 20ppm,and the average temperature coefficient scale factor can be controlled within 5ppm/℃,and the once electrify stability achieves 5ppm.

关 键 词：高精度 电荷平衡 I/F转换 三角波调制 

分 类 号：TN702[电子电信—电路与系统]