Ultralow Noise Preamplifier and Optimization Method for Induction Magnetometers


A 2 nV/√Hz and 10 fA/√Hz at 1-Hz ultralow noise preamplifier is designed to improve the sensitivity of the induction magnetometer (IM) from 0.1 Hz to 10 kHz. Meanwhile, the noise characteristics of IM are analyzed and distinguished. A novel optimization method to find the minimum length of the core under the required noise level and the limited IM weight is… (More)

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