Highly symmetric filter for a fully differential receive chain

J. Schumacher*, A. Malhotra, K. Gräfe, T. M. Buzug

*Corresponding author for this work


Differential signaling can provide a higher fidelity of the receive signals in MPI, which is especially important for mobile scanner setups not being operated in a shielding room. A passive, highly symmetrical filter is presented as a part of the fully differential receive chain of the scanner setup. Due to the combined use with a gradiometric receive coil, the requirements for the components in terms of voltage and current specifications can be lowered which allows for partly building the filter on a PCB with well-matched SMD capacitors and trace lengths. The achieved attenuation for the differential-mode excitation field feedthrough is 77 dB while providing a common-mode rejection of more than 49 dB throughout the receive bandwidth.

Original languageEnglish
Article number2009031
JournalInternational Journal on Magnetic Particle Imaging
Issue number2
Pages (from-to)1-3
Number of pages3
Publication statusPublished - 02.09.2020


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