Patent ID: 7116166

Claim:
A gradient amplifier power stage for providing a current to a gradient coil, comprising: a first bridge amplifier; a first DC voltage source coupled in parallel to the first bridge amplifier and configured for providing voltage supply at a first voltage to the first bridge amplifier; a second bridge amplifier coupled in series with the first bridge amplifer; a second direct-current voltage source coupled in parallel to the second bridge amplifier and configured for providing voltage supply at a second voltage to the second bridge amplifier; a third bridge amplifier coupled in series with both the first bridge amplifier and the second bridge amplifier; and a third direct-current voltage source coupled in parallel to the third bridge amplifier and configured for providing voltage supply at a third voltage to the third bridge amplifier, wherein the first bridge amplifier and the third bridge amplifier are configured to provide an inductive voltage drop in the gradient coil and the second bridge amplifier is configured to provide a resistive voltage drop in the gradient coil.