Patent ID: 7474100

Claim:
A method for driving a power supply of a magnetic field coil to generate a predetermined magnetic field profile B ( r ,t) in a volume under investigation of a nuclear magnetic resonance (=NMR) apparatus, the method comprising the steps of: a) predistorting an input signal i(t) that defines a temporal behavior of the magnetic field profile using a transfer function of the form G ⁡ ( s ) = O ⁡ ( s ) I ⁡ ( s ) = ∑ n = 0 N ⁢ s n ⁢ b n ∑ n = 0 N ⁢ s n ⁢ a n , with s=σ+jω, s εC, and with N≧2, wherein O(s) is the Laplace transform of o(t), and I(s) is the Laplace transform of i(t); and b) driving the power supply with the predistorted signal o(t) to compensate for apparatus distortions.