Rybalko, RuslanRuslanRybalko2022-03-112022-03-112011https://publica.fraunhofer.de/handle/publica/374837Levels of the human magnetic fields are one million times lower than the levels of artificial and geomagnetic fields. In Addition, the spectrum of magnetic noise overlaps the spectra of signals from biological objects. Therefore, the measurement of weak magnetic fields commonly requires methods which reduce external magnetic noise. As opposed to expensive methods such as magnetically shielded rooms (MSRs), a gradiometer on the base of a high precision fluxgate is a less expensive method for measuring weak magnetic fields. The proposed device consists of two fluxgate magnetometers included in the differential circuits. Such a method allows increasing efficient suppression of external magnetic noise. In this contribution we present the design and realization of a differential measuring circuit on the base of high sensitive magnetic sensors with very low intrinsic noise. In the future, this device will allow magnetic measurements of biological objects without any antimagnetic rooms.en621006conference paper