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Abstract #1157

Open-source, low-cost, flexible, current feedback-controlled driver circuit for local B0 shim coils and other applications

Nick Arango1, Jason P Stockmann2, Thomas Witzel2,3, Lawrence Wald2,3, and Jacob White1

1Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, 2A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States, 3Harvard Medical School, Boston, MA, United States

We demonstrate a low-cost (<$75/channel), open source, scalable, multi-channel current supply board that can provide up to 8 amps per channel for driving inductive loads such as local B0 shim coils. The design shows excellent stability while retaining sufficient gain in the audio frequency range to reject disturbances (e.g. gradient switching) and maintain stable output current.

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