This paper presents a new type of integrated operational amplifier low-frequency noise measurement system built by discrete components. First, the noise model of the operational amplifier is established. Then sub-circuit modules of the test system are designed and simulated separately. Finally, the low-frequency noise measurement and data acquisition of the integrated operational amplifier are performed. The experimental results show that this system can realize the measurement of low frequency noise and power spectral density of integrated operational amplifiers in the frequency range of 100~105 kHz. The measured input equivalent noise value is basically consistent with that presented in the product data-sheet, with the measurement error is 0.039.
CHEN Xiaojuan, ZHANG Xinchao, JANG Shan, KANG Aimin
. A Method of Low Frequency Noise Measurement for Operational Amplifier[J]. Journal of Applied Sciences, 2019
, 37(3)
: 369
-377
.
DOI: 10.3969/j.issn.0255-8297.2019.03.007
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