Patent ID: 6646439
Filing Date: 2003-11-11
Classification: G01R

Abstract:
A circuit arrangement for delivering power to coils, notably to gradient coils of an MR apparatus, said circuit arrangement comprising:at least a first coil whose magnetic field interacts with that of at least a second coil, both coils being traversed by a current I; at least a first and a second voltage source; at least a first and a second quadrupole switching network which are provided with inputs for control and regulating signals via which the current I through the quadrupole switching networks can be controlled, the first quadrupole switching network having two terminals at its input and two terminals at its output, and the second quadropole switching network having at least one terminal at its input and two terminals at its output, the two terminals at the input of the first quadrupole switching network being connected to the first voltage source in a potential embracing fashion and the second voltage source being connected to at least one terminal at the input of the second quadrupole switching network, wherein, the two terminals at the output of the first quadrupole switching network are connected, via the first coil and the second coil, respectively, to the two terminals at the output of the second quadrupole switching network, and the current I flows from the first quadrupole switching network, via the first coil, to the second quadrupole switching network and from the second quadrupole switching network, via the second coil, to the first quadrupole switching network.