Abstract: A device for real-time correction of set-point signals intended to receive at the input set-point signals and to deliver at its output set-point signals that are modified to compensate for defects, negative effects or the like subsequently encountered during the processing and/or the application of the set-point signals. This device (1) includes at least one circuit (1?) that is based on a microprogrammed structure and composed of several subassemblies (3, 4, 5, 6, 6?) that work with digital components essentially including a micro-sequencer (3) forming a counter, a memory (4) for storing micro-instructions, and a processing unit (5) combined with at least one working memory (6, 6?) and integrating arithmetic calculation modules (7,7?), whereby the processing unit (5) modifies the data of set-point signals in accordance with the micro-instructions that are addressed by the micro-sequencer (3) and by taking into account the correction coefficients that are provided.

Abstract: A magnetic field gradient generating system for a NMR system, includes at least one set of gradient coils, preferably arranged according to three axes of a spatial referential system, and a controlled power supplying unit for the gradient coils, the power supplying unit including, for each gradient coil, a converter/amplifier module, the modules being fed with pulse sequences of digital gradient data provided as word streams by an adapted gradient data generator according to a pulse program, each arrangement of a gradient coil and a converter/amplifier module forming a gradient channel. The power supplying unit also includes an automatic blanking system which scans the gradient data words sent to the [converter/amplifier] modules and, according to sensed values, selectively delivers blanking signals to be applied to the modules in order to disable the power stages of their respective amplifiers connected to the gradient coils, when no current is to be fed to the coils.

Abstract: A device for real-time correction of set-point signals intended to receive at the input set-point signals and to deliver at its output set-point signals that are modified to compensate for defects, negative effects or the like subsequently encountered during the processing and/or the application of the set-point signals. This device (1) includes at least one circuit (1?) that is based on a microprogrammed structure and composed of several subassemblies (3, 4, 5, 6, 6?) that work with digital components essentially including a micro-sequencer (3) forming a counter, a memory (4) for storing micro-instructions, and a processing unit (5) combined with at least one working memory (6, 6?) and integrating arithmetic calculation modules (7, 7?), whereby the processing unit (5) modifies the data of set-point signals in accordance with the micro-instructions that are addressed by the micro-sequencer (3) and by taking into account the correction coefficients that are provided.

Abstract: A magnetic field gradient generating system for a NMR system, includes at least one set of gradient coils, preferably arranged according to three axes of a spatial referential system, and a controlled power supplying unit for the gradient coils, the power supplying unit including, for each gradient coil, a converter/amplifier module, the modules being fed with pulse sequences of digital gradient data provided as word streams by an adapted gradient data generator according to a pulse program, each arrangement of a gradient coil and a converter/amplifier module forming a gradient channel. The power supplying unit also includes an automatic blanking system which scans the gradient data words sent to the [converter/amplifier] modules and, according to sensed values, selectively delivers blanking signals to be applied to the modules in order to disable the power stages of their respective amplifiers connected to the gradient coils, when no current is to be fed to the coils.