Nanosecond-Skew 24-bit TMR (Tunnel Magnetoresistance) Array DAQ for Geomagnetic Anomalies, W5500
Low-noise TMR sensor array with 24-bit synchronized ADCs, adaptive power modes, and W5500 Ethernet streaming for geomagnetic anomaly monitoring.
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Project description
Overview This patent describes a geomagnetic anomaly detection device built around a multi-sensor TMR (Tunnel Magneto-Resistance) array and a carefully engineered low-noise signal chain. The design goal is long-duration, high-precision field operation where external interference, sensor noise floor, and power constraints often degrade measurement quality. Key elements include: triaxial TMR sensing units (orthogonally arranged), front-end impedance decoupling via voltage followers, low-noise instrumentation amplification with single-resistor gain setting, passive analog filtering, and…
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