Chair of Networked Electronic Systems

Electronics for biomagnetic sensors

Goal: Magnetic field sensors based on miniaturized magnetoelectric composites have revealed their potential to detect sub-pT fields at room temperature under certain conditions. The general objectives of the project are the research and development of different magnetoelectric sensor approaches and the electronic interface circuits.

Related Publications

Parallel Recording for Improved Readout of MEMS Cantilever Sensors

Micromechanically integrated (MEMS) cantilever sensors have demonstrated potential for a wide variety of biomedical detection applications. A current collaborative research effort at the University of Kiel aims at the detection of magnetism associated with medical and biological processes using custom-made sensors as well as its readout electronics. The use of MEMS technology allows to minimize the sensor area and integrate parallel sensor structures on a single die. In addition to providing a larger spatial resolution, this approach yields the potential for improving the signal-to-noise ratio (SNR) by accessing several sensors in parallel. However, massive parallel readout requires miniaturized low-noise interface electronics which operates at very low power consumption per sensor channel. Initially, the development of the mechanical parts and the electronics will occur on separate chips, with the final goal of packaging sensor arrays and sensor electronics in a single unit. To validate the proposed SNR improvement principle, previously manufactured larger prototype sensors are connected to an amplifier circuit built of discrete components. These larger sensors and optimized amplifiers serve as a benchmark for the targeted miniaturized sensor elements and CMOS readout circuits. Paper on researchgate.net