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

Abstract

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

CLC Number:

TN06

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.

Figures/Tables 7

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Table 1

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References 16

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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

Research of Fast Determination Method of On-chip Band-gap Voltage Reference

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