Journal of Applied Sciences ›› 2019, Vol. 37 ›› Issue (3): 369-377.doi: 10.3969/j.issn.0255-8297.2019.03.007

• Signal and Information Processing • Previous Articles     Next Articles

A Method of Low Frequency Noise Measurement for Operational Amplifier

CHEN Xiaojuan1, ZHANG Xinchao1, JANG Shan2, KANG Aimin2   

  1. 1. College of Electronical and Information Engineering, Changchun University of Science and Technology, Changchun 130022, China;
    2. Jilin Electric Power Corporation, Changchun 130022, China
  • Received:2018-07-02 Revised:2018-11-26 Online:2019-05-31 Published:2019-05-31

Abstract: 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.

Key words: background noise, long-term instabity, low frequency noise, time series, power spectral density

CLC Number: