Patent ID: 9270294
Filing Date: 2016-02-23
CPC Classification: H02M,H03M

Claim Text:
1. A method for generating a digital signal from an analog signal, wherein the analog signal is generated by means of a frequency converter on the basis of pulse width modulation having a variable period duration, wherein values of the digital signal correspond to an average value of the analog signal over an associated period duration of the pulse width modulation, the method comprising the acts of: generating a bit stream on the basis of the analog signal using a sigma-delta modulator, wherein the bit stream is generated having a constant modulator clock; generating temporally successive digital samples during an associated period duration by filtering the bit stream using a number of digital filters; wherein intervals of time between the temporally successive digital samples are multiples of the modulator clock; wherein the digital filters are started with a time delay with respect to one another, wherein the time delay is equal to the intervals of time, and wherein a respective digital filter outputs an associated digital sample; and forming an average value of the digital samples generated during the associated period duration, wherein the average value forms the value of the digital signal (DS) for the associated period duration.