| 摘要 |
In a gradient amplifier for a nuclear magnetic resonance tomography apparatus and a method for operating same, a reference value unit for providing a reference value for a gradient coil current, an actual value unit for determining an actual value of the gradient coil current, a control unit for determining a setting value, a modulator for generating at least one output stage drive signal and an output stage for generating an output signal across the coil are provided. The precision of the reference value and the precision of the actual value are higher by at least the factor of 10 than the precision of the setting value and/or of the at least one output stage drive signal and/or of the output signal. As a result, the gradient amplifier has a precision that is high enough to avoid disturbances affecting in the image can be realized with relatively little outlay.
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