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Abstract #4278

A 5.7mW 1.5T Silicon Germanium Pre-Amp, and its Effects on Image Distortion

Christopher Vassos1, Fraser Robb2, Shreyas Vasanawala3, John Pauly1, and Greig Scott1
1Electrical Engineering, Stanford University, Stanford, CA, United States, 2GE Healthcare, Aurora, OH, United States, 3Radiology, Stanford University, Stanford, CA, United States

A 5.7mW Silicon Germanium Pre-Amplifier was constructed, characterized, and its potential impact on image quality demonstrated. The amplifier demonstrates significant power savings relative to current implementations at the cost of increased device non-linearity and decreased input impedance. A benchtop measurement setup was constructed to simulate coils signals in conjunction with a physical receive chain. Measured image distortion began at peak input powers of -25dBm. This corresponds to high bandwidth, high dynamic range imaging sequences. For small coil sizes this distortion may not play a role, reducing the power barrier to wireless receive arrays.

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