Amplifier having a regulation system controlled by the output stage

A magnetic resonance system having gradient amplifier and a gradient coil, comprising:

• an output stage adapted to connect to an electrical energy source;
• a compensation device adapted to connect to the electrical energy source and to measure a first parameter value and to output at least one compensation signal;
• a control device, wherein the control device accepts at least one compensation signal as an input, and controls the output stage by a control signal output;
• and
• wherein the output stage of the gradient amplifier permits supply-voltage-dependent, output-current-regulated amplification by the gradient amplifier of the gradient coil in the magnetic resonance system.

A method of controlling a gradient amplifier of a gradient coil within a Magnetic Resonance system, having an output stage which is supplied by an electrical energy source, the method comprising:

• ascertaining a first parameter value of the energy source;
• generating a compensation signal as a function of the first parameter value;
• generating a control signal as a function of the compensation signal, wherein the output stage generates an output signal as a function of the control signal;
• and
• wherein the method of controlling the output stage of the gradient amplifier permits supply-voltage-dependent, output-current-regulated amplification by the gradient amplifier of the gradient coil in the magnetic resonance system.