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Abstract #0043

5T On-Coil Current-Mode Class-D (CMCD) Amplifier with Amplitude Modulation Feedback and Voltage-Mode Class-D (VMCD) Preamplifier

Natalia Gudino1, Matthew J. Riffe1, Lisa Bauer2, Jeremiah A. Heilman3, Mark A. Griswold4

1Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States; 2Physics Department, Case Western Reserve University, Cleveland, OH, United States; 33Quality Electrodynamics, Mayfield Village, OH, United States; 4Radiology Department, Case Western Reserve University, Cleveland, OH, United States


We present a Current-Mode Class-D (CMCD) Feedback amplifier with class-D preamplification that avoids the characteristic DC losses of linear preamplification. We demonstrated a good wave profile of the AM feedback system that modulates the RF pulse and preliminary images that prove successful operation of the system in the scanner.