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Abstract #2691

Low IF Passive Mixer Topologies for Low Power MRI Front Ends

Andreas Port1, John Pauly2, Fraser Robb3, and Greig Scott2

1Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland, 2Electrical Engineering, Stanford University, Stanford, CA, United States, 3GE Healthcare, Aurora, OH, United States

As MRI array counts expand, there is growing interest in moving more of the receive electronics onto the array, the ultimate goal being wearable, and cordless arrays. This places severe constraints on the maximum feasible power consumption per channel. We explore low power front-end topologies employing passive mixers. If combined with low-power high resolution successive approximation ADCs or continuous time sigma delta ADCs, receive arrays at only 100mW per channel may be feasible.

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