Modulator input signal producing method for magnetic resonance imaging device, involves adding dither signals to control signal, and producing dither signals based on periodic output of units of discrete dither series of basic form

摘要

The method involves adding dither signals (DITHER1, DITHER2) to a control signal (HIRES) that is present as a digital control signal. Two common mode modulator input signals are output as a digital modulator input signal at a modulator output stage in a H-bridge circuit. The dither signals are produced based on a periodic output of units of a discrete dither series of basic form. A common mode voltage is produced at the output of the modulator output stage by the dither signal. Independent claims are also included for the following: (1) a digital pre-modulator comprising a counter unit (2) a modulator system comprising a digital pre-modulator.