A Low-Noise Amplifier for Submarine Electric Field Signal Based on Chopping Amplification Technology

In the exploration of ocean resources, the submarine electric field signal plays a crucial role through marine electromagnetic methods. However, due to the field signal's low-frequency and weak characteristics, it often encounters interference from the instrument's own 1/f noise during its...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2024-02, Vol.24 (5), p.1417
Main Authors: Liu, Fenghai, Chun, Shaoheng, Chen, Rujun, Xu, Chao, Cao, Xun
Format: Article
Language:English
Subjects:
Amplifiers (Electronics)
chopping amplification technology
circuit simulation
Design
Electric fields
Electromagnetism
Electronic components industry
equivalent input voltage noise spectrum (EIVNS)
Helicopters
low-noise amplifier
noise measurement
Seawater
Simulation methods
submarine electric field
Temperature
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Summary:In the exploration of ocean resources, the submarine electric field signal plays a crucial role through marine electromagnetic methods. However, due to the field signal's low-frequency and weak characteristics, it often encounters interference from the instrument's own 1/f noise during its acquisition. To address this issue, we developed a low-noise amplifier for the submarine electric field signal based on chopping amplification technology. This amplifier utilizes low-temperature electronic components to adapt to the cold submarine environment and enhances its independence by incorporating a square wave generator. Additionally, we conducted simulations and experimental tests on the designed chopper amplifier circuit, evaluating the equivalent input voltage noise spectrum (EIVNS) and the frequency response within 1 mHz~100 Hz. The experimental results indicate that the amplifier designed in this study achieves sufficiently low noise 2 nV/√Hz@1 mHz, effectively amplifying the submarine electric field signal measured with the electric field sensor.
ISSN:1424-8220
1424-8220
DOI:10.3390/s24051417