片上带隙基准电压源参数快速确定方法

doi:10.16180/j.cnki.issn1007-7820.2020.11.011

摘要/Abstract

摘要：

片上带隙基准电压源输出特性的偏差导致集成电路片上电源模块输出存在0~0.3 V的误差。文中对片上电源模块误差产生原因进行了研究,提出一种输出可调的带隙基准电压源外部电路设计方案来实现片上电源模块精确输出,并对电路参数确定方法进行了研究。该电路通过对片上带隙基准电压源后端分压电阻进行参数矫正实现对电源模块输出的精确调整。根据电流相等原理建立数学模型,通过测量两组固定参数电源模块输出数据,代入模型计算实现参数快速确定。实际测试数据证明,该电路可实现片上电源模块精确输出,误差仅为±0.02 V,满足实际应用需求。

关键词: 片上, 带隙基准, 外部电路, 数学模型, 参数快速确定, 误差分析

Abstract:

The deviation of the output characteristics of the on-chip bandgap reference causes an error of 0~0.3 V on the output of the power module on the integrated circuit. To investigate the causes of the on-chip power module error, an peripheral circuit design scheme with adjustable output bandgap reference voltage is proposed to realize the accurate output of the on-chip power supply module, and the method of determining the circuit parameters is studied. The circuit accurately adjusts the output of the power module by performing parameter correction on the on-chip bandgap reference voltage source. The mathematical model is established according to the principle of equal current, and the output data of two sets of fixed parameter power modules are measured, and the parameters are quickly determined by substituting the model calculation. The actual test data proves that the circuit can achieve accurate output of the on-chip power module with an error of only ±0.02 V, which meets the requirements of practical applications.

Key words: on chip, band-gap voltage reference, peripheral circuit, mathematical model, fast determination method, error analysis

中图分类号:

TN06

郑璇,李春江,张树平,李晓. 片上带隙基准电压源参数快速确定方法[J]. 电子科技, 2020, 33(11): 55-58.

ZHENG Xuan,LI Chunjiang,ZHANG Shuping,LI Xiao. Research of Fast Determination Method of On-chip Band-gap Voltage Reference[J]. Electronic Science and Technology, 2020, 33(11): 55-58.

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参考电压/V	R₁/kΩ	R₂/kΩ	R₃/kΩ	电流 /mA	输出计算值/V	输出实测值/V
1.323	10.86	6.66	130	198	3.323	3.322
1.319	10.75	6.55	240	201	3.319	3.319
1.389	10.79	6.62	62	209	3.319	3.320
1.329	10.78	6.56	100	202	3.310	3.313
1.289	11.11	6.85	430	188	3.317	3.316
1.408	11.04	6.71	51	209	3.326	3.326
1.274	11.09	6.83	470	186	3.320	3.320
1.440	10.97	6.71	47	214	3.325	3.327
1.290	11.13	6.77	360	190	3.321	3.319
1.263	11.15	6.83	空	183	3.321	3.323