Koninklijke Philips Corporation N.V.

Daniel T Trabbic

Thomas R McBride

A controlled power supply () drives a magnetic field gradient coil () of a magnetic resonance imaging apparatus (). A gradient amplifier () includes a plurality of switching power regulators () which are electrically connected in series. A bipolar circuit () receives power from the series connected switching power regulators () and delivers the power at a selected polarity to the gradient coil (). A control circuit () delivers phase staggered pulse width modulated control signals (A, B, C, D) to the switching power regulators ().

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Burton, OH, United States of America

Daniel T Trabbic